ACADIA Pharmaceuticals Inc. (ACAD) Earnings Call Transcript & Summary

July 13, 2023

NASDAQ US Health Care Biotechnology special 61 min

Earnings Call Speaker Segments

Operator

operator
#1

Hello, and thank you for standing by. Welcome to ACADIA Pharmaceuticals Conference Call. [Operator Instructions] I would now like to hand the conference over to Jessica Tieszen. Ma'am, you may begin.

Jessica Tieszen

executive
#2

Thank you. Good afternoon, everyone, and thank you for joining us on today's call to discuss Acadia's expanded agreement with Neuren Pharmaceuticals. Joining me on the call today from Acadia are Steve Davis, our Chief Executive Officer, who will provide some opening remarks before turning it over to Brendan Teehan, our Chief Operating Officer, Head of Commercial, to discuss the debut launch. Mark Schneyer, our Chief Financial Officer, will discuss the financial terms of the Neuren agreement as well as review preliminary second quarter net sales and updated guidance. Steve will finish our prepared remarks with some closing thoughts before opening the call up for your questions. In addition, Doug Williamson, our Head of R&D; and Kathie Bishop, our Head of Rare Disease and external innovation, will be on the call and available for the Q&A session. I would also like to point out that we are using supplemental slides, which are available on the Events and Presentations section of our website. Before we proceed, I would first like to remind you that during our call today, we will be making a number of forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995. These forward-looking statements, including goals, expectations, plans, prospects, growth potential, timing of events or future results, are based on current information, assumptions and expectations that are inherently subject to change and involve a number of risks and uncertainties that may cause actual results to differ materially. These factors and other risks associated with our business can be found in our filings made with the SEC. You are cautioned not to place undue reliance on these forward-looking statements, which are made only as of today's date. I will now turn the call over to Steve.

Stephen Davis

executive
#3

Thank you, Jess. Good afternoon, everyone, and thank you for joining us. Please turn to Slide 4. I'm pleased to announce today that Acadia has acquired exclusive worldwide rights to trofinetide as part of an expanded agreement with Neuren Pharmaceuticals. We've also acquired worldwide rights to Neuren's clinical stage development candidate, NNZ-2591, in Rett and Fragile X syndromes. Our expanded agreement follows our April 2023 launch of trofinetide, which is marketed as DAYBUE in the United States, as the first and only drug approved for the treatment of Rett syndrome. This worldwide expansion advances our rare disease strategy and highlights our commitment to pursuing innovative new products. The unmet need in Rett syndrome outside of the United States, is very similar to the dramatic unmet need that we see inside the United States, is a very debilitating disorder with no approved treatments outside of the U.S. Regarding potential addressable population, the worldwide instance rate of Rett syndrome is pretty constant. Therefore, for example, the prevalent population in Europe is somewhat larger than U.S. and in Japan it is somewhat smaller. Please turn to Slide 5. As Brendan will describe in greater detail in a moment, the debut launch is off to a great start. The Rett population is adopting faster than expected. Health care professionals and caregivers are reporting benefits. Approximately 20% of covered lives have a written policy in place. And our launch operational execution is going exactly according to plan. In our announcement today, we provided preliminary second quarter net sales of DAYBUE in the range of $21 million to $23 million. We also provided third quarter guidance on DAYBUE net sales in the range of $45 million to $55 million. While it's still very early days in the launch, at this point, the demand we're seeing for trofinetide in the Rett community has exceeded our plan. While it is premature to draw long-term conclusions on compliance and persistency, we're very encouraged that the hard work we put into educating the medical and caregiver communities appears to be making a difference. However, once again, I want to stress that it's still very early days. In addition, we've made very good progress in establishing access to trofinetide, most patients on therapy today have given access under a letter of medical necessity as most payers have not yet adopted a formal written policy. And with that, I'd like to pass the call over to Brendan to discuss the launch in more detail.

Brendan Teehan

executive
#4

Thank you, Steve. As Steve noted, we're excited to have the opportunity to serve the Rett community worldwide as a function of this agreement. Today, I'd like to give you a little more insight into the early days of our launch of DAYBUE for the treatment of Rett syndrome here in the United States. As a reminder, DAYBUE received FDA approval in March 2023, and then we made the product commercially available in mid-April. So I'll be sharing insights from commercialization over the first 12 weeks of the launch. Let's start with the market demand dynamics. As we previously described, we expect the demand to be high and it has been in the early days of the launch. We also expected demand to be somewhat moderated by patients and caregivers gaining access to their Rett physicians who generally have small staff and are seeing patients largely through scheduled Rett Clinic days generally once or twice monthly depending on resourcing. Patients, caregivers and health care professionals are also working through the early prior authorization process with their payers to gain appropriate access to DAYBUE. Let me double-click on a couple of topics and provide a bit more insight. As we noted, our first focus was on assisting our clinical trial patients in converting over to commercial therapy once they completed their participation in the open-label extension portion of our Phase III studies. This conversion has continued to progress as expected. From here, we turned our attention to the broader Rett patient population, first focusing on the Rett centers of excellence and high-volume institutions where a disproportionate number of Rett patients are treated. As anticipated, we are seeing significant demand in all treatment settings. There were a few centers of excellence in particular, that contributed to our early strong uptake. That said, we are also encouraged by the breadth of prescribers we are seeing from not only centers of excellence but also high-volume institutions and smaller community-based practices. We will work diligently with these existing centers and new prescribers as they continue to see additional Rett patients many for the first time since the product's approval. Our sales team is gaining access to these Rett centers, and we are pleased by the reception we're receiving and the relationships we're establishing with these treatment teams. Next, as you know, we established a comprehensive support system for patients, caregivers and providers, comprised of our dedicated distribution and specialty pharmacy services, our patient HUB staffed by clinical nurse care coordinators, our clinical pharmacists and benefit services team as well as our field-based family access managers who are all specifically paired with each new DAYBUE patient and family as they initiate their treatment journey. The goal here is to set the appropriate clinical benefit and treatment management expectations with physicians and families to ensure the optimal initiation and treatment journey for the patient. We are pleased by all the feedback we have been receiving regarding the high quality of the personalized service our teams are providing. Most importantly, we are excited about the clear clinical benefits caregivers are sharing with us about the day-to-day meaningful improvements they are seeing in their loved ones who have started treatment with DAYBUE. Caregivers are readily reaching out to their family access managers to share these early success stories, often noting abilities their daughters or sons are demonstrating either for the first time in a long time or for the first time ever. Let me now turn to compliance and persistency. What we know from market research and discussions with our prescribing physicians is that the majority of health care professionals are titrating up on dose for DAYBUE with their patients to find the dose that works best for the individual patient. With that background, it will take some time for us to see what titration will mean to both the average dose per patient over time as well as the refill rate. As stated above, we have a highly valued proactive program to educate health care professionals and caregivers on the benefits of DAYBUE as well as GI management, which we believe is leading to thoughtful titration to find the best dose to provide long-term benefit for these patients. In addition, physicians and families have been very receptive to other elements of our GI management plan, including management of anti-constipation medications as described in our package insert. While it's very early, we are very encouraged that this titration regimen of the GI management plan that we've invested in heavily appeared to be showing benefits. Let me turn to payer policy and access. It's still early innings regarding access. However, patients covering approximately 20% of Rett patients have issued a written policy for DAYBUE. These formal plans generally have been consistent with our expectations. Where formal plans don't exist, which is the case for the vast majority of patients on therapy, access has been granted by medical exception. Of course, we work diligently with payers as they establish formal policies at the remaining plans. We continue to work very closely with plans to ensure broad access for DAYBUE to all appropriate patients. As a reminder, we are very pleased with the DAYBUE label, which has no restrictions on gender, no age restrictions over -- from 2 years or older and no requirement for MECP2 testing. Let me turn to our operational execution. Our sales teams have established very good access to centers of excellence, high-volume institutions and key community practices and we're seeing prescriptions coming from each of these treatment locations. Our HUB services and family access management teams are supporting successful patient onboarding and continued HCP patient and family engagement along the treatment journey. And finally, our treated patient population is very much in line with our age, weight and gender expectations for the patients being treated in the early post-launch phase. We look forward to sharing more insights as we progress through the -- into the launch of DAYBUE. I'd like to turn the call over to Mark starting on Slide 7.

Mark Schneyer

executive
#5

Thank you, Brendan. Let me briefly describe the financial terms of the expanded agreement on Slide 7. As you can see on the left side, the financial terms for our existing rights to trofinetide in North America remain unchanged. Moving to the right side, the consideration for our expanded rights to trofinetide outside North America, and for global rights to NNZ-2591 in Rett syndrome and Fragile X include a $100 million upfront payment region-specific milestones for trofinetide in Europe, Japan and Rest of World as listed in the table. These milestones are awarded upon first commercial sale and the achievement of annual net sales thresholds. Region-specific tiered royalties for trofinetide ranging from the mid-teens to low 20s as a percentage of trofinetide net sales. And for NNZ-2591 global payments for this asset are identical to the global payments for trofinetide. The upfront consideration will be funded from cash on hand. Our cash balance continues to be strong as we are already close to cash flow breakeven and our results from DAYBUE will accelerate our pathway to becoming cash flow positive. We ended Q2 with a cash balance of approximately $375 million and we will have pro forma cash of approximately $275 million after completing the transaction. We do not require any additional financing to support our current business plan, which now includes: execution of the North American trofinetide opportunity and the continued advancement of our pipeline, including our Phase III program with pimavanserin and negative symptoms of schizophrenia; our Phase III program for Prader-Willi syndrome with ACP-101; our Alzheimer's disease psychosis program with ACP-204 in our early-stage portfolio. Please turn to Slide 8. Today, we are also announcing preliminary Q2 net sales ranges as well as forward-looking guidance for DAYBUE and NUPLAZID. Starting with DAYBUE, we expect to record Q2 net sales within the range of $21 million to $23 million and are providing a Q3 net sales guidance range of $45 million to $55 million. As discussed by Steve and Brendan, the launch is off to a great start, and we are highly encouraged at the level of demand we are seeing for DAYBUE. Our Q2 preliminary net sales benefited from the prevalent population adopting faster than expected, both from patients converting from our open-label extension trial as well as from naive patients starting therapy. As a reminder, our longer-term net sales trajectory will be influenced by patient compliance rates and levels of persistency. As most of our patients are titrating their initial doses and have only had 1 or 2 scripts filled, we are not yet at the stage where we have meaningful data on the go-forward rates of compliance and persistency. And finally, we continue to engage with payers as many of them are still working to formalize their reimbursement policies. Let me now turn to NUPLAZID. We expect to record NUPLAZID Q2 net sales within the range of $140 million to $144 million. This represents approximately 3% year-over-year of demand and selling growth. Our Q2 growth in NUPLAZID was driven by an increase in new patient starts across both office-based and long-term care channels with particularly strong performance in long-term care. Based on our year-on-year performance and now that we're halfway through the year, we are narrowing our full year net sales guidance range for NUPLAZID, we are increasing the bottom end of the range by $10 million to $530 million, and adjusting the top end by $5 million to $545 million. I'll now turn it over to Steve for closing remarks.

Stephen Davis

executive
#6

Thanks much, Mark. I'd like to end today's prepared remarks by highlighting our execution across our 4 strategic priorities on Slide 9. First, as we highlighted today, our execution of the DAYBUE launch is going extremely well, and we're seeing early uptake faster than planned. And today, we acquired worldwide rights to trofinetide. Second, NUPLAZID in PDP is delivering steady volume and increasing market share while increasing profitabilities. Third, we plan to complete enrollment in our Phase III ADVANCE-2 study for the negative symptoms of schizophrenia midyear with top line results expected in the first quarter of 2024. Fourth, we plan to initiate a global Phase III study of ACP-101 for Prader-Willi syndrome in the fourth quarter of 2023. And finally, we plan to commence Phase II clinical studies of ACP-204 in the second half of this year. We look forward to providing additional updates on our second quarter earnings call. As always, I would like to thank our employees for their accomplishments and their ongoing commitment and passion as we continue our mission to elevate life. I'll now turn things back over to the operator.

Operator

operator
#7

[Operator Instructions] Our first question comes from the line of Neena Bitritto-Garg with Citi.

Neena Bitritto-Garg

analyst
#8

Congrats on the update. I'm just curious if you can give us some more details on the trofinetide launch, in particular, if there was any stocking or any inventory impact in the likely range that you provided? And then also if you could give us some details on the number of patients that you actually had on drug at the end of June, just so that we can get a sense of how the guidance quarter-over-quarter, what that implies about patient numbers in Q2 and Q3?

Stephen Davis

executive
#9

Yes. Brendan, I'm going to let you take the first question, Mark, I'll ask you to take the second.

Brendan Teehan

executive
#10

Sure. Thanks for the question. As it relates to inventory, no, the inventory was not a component of our performance. The second question around patients, I think that we're more focused on, at this very early stage, trying to give you the right types of metrics that will avoid misinterpretation of the early kind of post launch dynamics, that's why we're giving guidance for the third quarter to give you a sense of progression from where we are today to where we think we'll be roughly 90 days from now.

Stephen Davis

executive
#11

I think you've answered both questions. That's all right. Mark, did you want to add something?

Mark Schneyer

executive
#12

Yes. Just I think the revenue recognition model for DAYBUE will be different for NUPLAZID. So there's no kind of difference between selling and demand. We have a single specialty pharma distribution, we sell on a consignment model. And then it's only really right before a script is filled that this distributor takes possession in ownership and then we recognize revenue. So you can think of this as really a sell-through model for revenue purposes. So our revenue will very closely match demand for DAYBUE.

Neena Bitritto-Garg

analyst
#13

Okay. Got it. No, that makes sense. I guess, maybe if I can just ask the question on patient starts a little bit differently. I guess, then what are the assumptions that are going into the 3Q guidance range that you provided? And how should we think about the gross to net and, I guess, the net adds and how all those things should play into that number?

Stephen Davis

executive
#14

Sure, Mark, do you want to take that?

Mark Schneyer

executive
#15

Yes. I mean as we think about, it's all of that, right? So it's assumptions on rates of continuations for existing patients, new patient adds, patients that are still working through the access program that have already submitted enrollment forms and just overall levels of compliance and persistency. So those are the assumptions that we're going forward. I think as just -- as Brendan mentioned, it is very early stage, we think providing kind of our guidance is more informative as any one of these variables is really very preliminary kind of the data that we have now, and we're certainly open to while -- wide bands of interpretation in and of themselves.

Operator

operator
#16

Our next question comes from the line of Ritu Baral with TD Cowen.

Ritu Baral

analyst
#17

And thank you for not limiting me to one. You can't do this to guidance and make me ask just one question. So this patients -- the profile of the patients, you said that they're sort of along with your expectations. And I believe previously you had said that you would expect younger patients, smaller patients, given this is weight-based dosing to start earlier, is that still what you're seeing? Because in many other orphan launches, we've seen sort of the larger, older, bigger patients [ bit earlier ] or so? And then I've got a follow-up on Europe.

Stephen Davis

executive
#18

Yes. We'll take the first question. Brendan, do you want to take that?

Brendan Teehan

executive
#19

Sure, Ritu, thanks so much for the question. And yes, I would say, in the very early days post-launch, we are seeing age, weight and gender very much in line with what we expected. So at age range towards the younger end, although we have been heartened by the number of prescriptions for patients over the age of 20, in line with our -- with a broad label. We've also been excited to see male enrollment forms at about the proportion that we would have expected for the patient population. So if that gives you some sense, I think we're largely on track with what we described.

Ritu Baral

analyst
#20

Yes. As far as Europe goes, you -- well, first of all, where are you with discussions with your [indiscernible] Regulators like [ DMO ]? Has Neuren gone through scientific advice -- or is that something that you'll be embarking. I mean I think the bottom line is do you have an idea of path to approval in Europe right now?

Stephen Davis

executive
#21

We do. Kathie, do you want to take that?

Kathie Bishop

executive
#22

Ritu, it's Kathie, and thanks for the question. So Neuren previously held this and now we're very excited to take it over. We've had a lot of interest from patients around the world since we had positive data. And so we're excited to take that forward. To answer your question, our first step will be to have those regulatory interactions. There has been some country level scientific advice. But now we want to sort of accelerate that and move into a full path to get to regulatory approval in Europe. And so we'll be starting with those appropriate regulatory interactions.

Ritu Baral

analyst
#23

Got it. I'm going to sneak in one more that came in from a client. Can you give the rough breakout of patients between open-label patients that are converted to commercial just fundamental in new patients to DAYBUE for us?

Brendan Teehan

executive
#24

Yes. Sure, Ritu. Thanks for the question. Just going back to previous statements, we had an expected number of patients that had been in the open-label extensions. They are, as you would expect, making an increasingly small proportion of our overall patient population. So de novo patients in the middle of the quarter certainly began to outpace the clinical trial conversion patients. And I would expect that as we move into future calls, there'll be an increasingly small minority of patients on DAYBUE.

Operator

operator
#25

Our next question comes from the line of Charles Duncan with Cantor.

Unknown Analyst

analyst
#26

This is [indiscernible] on for Charles at Cantor. Just wanted to ask a quick question on NNZ-2591, is it -- do you have an option to expand development into other rare disease indications?

Stephen Davis

executive
#27

We do not. We acquired rights to 2591 for Rett and Fragile X. Neuren is already developing the compound. It's in the clinic. They've already completed Phase I. They're working on studies in 4 different neurodevelopmental indications. We acquired rights for Rett and Fragile X.

Operator

operator
#28

Our next question comes from the line of Gregory Renza with RBC Capital Markets.

Gregory Renza

analyst
#29

Steve and team, congratulations on the updates all around. Steve, just a follow-up on your commentary and Kathie's on the regulatory proceedings outside of the U.S. I'm just curious if you could comment on maybe the calculus involved with respect to the infrastructure and the resources required for you and the team to go ex U.S., I would imagine that there are some considerations on broadening that infrastructure given the sort of new grounds for Acadia. So any commentary you have on how that would look, would be great. And then secondly, just with respect to the priority review voucher, what are the latest plans there seeing 1 transaction more recently in this space. Just curious how you're handling of a sale versus a hold on what the latest is on the PRV. Congratulations again.

Stephen Davis

executive
#30

Yes, I'll take the second part first of PRV then I'll ask Brendan to respond to the infrastructure question. In terms of the PRV, we've not made a determination about whether we will use it ourselves or sell it. There obviously is an established market for selling these. And just as a reminder, if we sell it, Neuren is entitled to 1/3 of the proceeds and we're entitled to 2/3. If we use it, Neuren is entitled to a payment that would be equivalent to the market value excuse me, 1/3 of the market value at that point in time. Brendan, do you want to address the infrastructure question.

Brendan Teehan

executive
#31

So a couple of things. Obviously, with the U.S. launch, we've leveraged a lot of our internal infrastructure and have added as appropriately for our target audience. In addition to that, at Acadia, there are a number of people who have both worked in rare disease in the U.S. and outside the United States. There are a number of us who have launched products internationally as well. We've done early diligence in the major markets to have an understanding of our options, and I'm sure we'll provide updates as we get closer to the commercialization process. But we will leverage those learnings to make the appropriate infrastructure decisions.

Operator

operator
#32

Our next question comes from the line of Yatin Suneja with Guggenheim.

Yatin Suneja

analyst
#33

And very nice transaction, congratulations. Just with regard to the estimates that you have provided, especially for DAYBUE. Can you just comment on how should we think about the net price now? I mean, obviously, there's a difference between the gross and the net. So when you talk about the guidance, what sort of a price you are assuming, that's one? And anything if you can comment on the compliance, I know it might be early discontinuation at or compliance that you might be seeing in the field.

Stephen Davis

executive
#34

Yes. I'll speak to the compliance issue, and then I'll ask Mark to answer the other question. So on compliance, of course, we see what the doctors write on the script. But based -- as Brendan mentioned, based upon our market research and just our very, very close interactions with the medical community, we know that a significant majority of doctors are having their patients titrate up, which we -- again, that's part of our GI management regimen that we recommend, and we think that is a good thing. But we don't know precisely what schedule they're on because they typically almost always right whatever the dose is for the drug on the script that tell the patient that I want you in the first week or 2 or a month or 2 to titrate up. And so we just don't have a -- we don't have visibility as to precisely how that titration is going on kind of a brand-wide basis. As we move forward, we'll get better information. We'll get a better lens on that as we go forward. But I think the right way to think about it is a significant majority of patients are titrating up for a relatively brief period of time. And again, at this point, we have some patients that have had 1 refill, some patients -- a few patients have had 2 refills. And I think by the time we get to the next quarterly call, not the call coming up a couple of weeks, but after that, we should have -- we have better information at that point. Okay, Mark, do you want to add?

Mark Schneyer

executive
#35

Yes, I think just for follow-up on that, as we gave our guidance, we did think about a range of which Steve mentioned there, compliance because that really does impact the kind of net price for patients. And then obviously, as we've got on previous calls, we do have mandatory government disciplines that impact net pricing and that we're accounting for, both in our results and our forecast going forward. At this time that those numbers are variable. So we're not giving information on gross to net at this time.

Yatin Suneja

analyst
#36

Got it. One more, if I can. Can you maybe also articulate for us the market opportunity outside U.S., both in patient terms and maybe the dollar terms, again, doesn't have to be accurate, but just as a percentage of U.S., how should we think?

Stephen Davis

executive
#37

Yes. Thanks for the question. At this juncture, we're just going to really speak at very high levels. As I mentioned in my remarks, the incident rate worldwide is very consistent. So that would tell you that the prevalent population in Europe is somewhat larger than U.S., somewhat smaller in Japan. In terms of pricing, what we typically see with rare drugs is lower prices outside of the U.S. But for rare diseases, of course, they're significantly closer to U.S. price than for nonrare diseases -- most nonrare diseases, I guess, I would say. And so in terms of the overall population size, in terms of patients and revenues, we'll get back with more details as we get closer to a launch. But we'd simply say at this point that it's a very sizable opportunity and a very attractive opportunity outside of the current market were approved in the United States.

Operator

operator
#38

Our next question comes from the line of Tazeen Ahmad with Bank of America.

Unknown Analyst

analyst
#39

This is [ Jae Mylan ] on for Tazeen. Congratulations on the exciting news. We just have 2 quick ones. The first being how long you expect to take through to peak sales in both the U.S. and ex U.S. for DAYBUE given the strong early launch. And the second question being, if you think the space can support annual price raises in the future?

Stephen Davis

executive
#40

Well, I'll take the second question because it's really straightforward. We just don't comment on pricing adjustments in the future. I think the right way to think about the dynamics of the launch is, as is the case with most of our diseases, of course, we have a sizable prevalent population for Rett syndrome, this is a fairly sizable market in rare disease. We've indicated that the prevalent population is 6,000 to 9,000, addressable population today is about 4,500. However, what we often see in rare disease is -- you often see that gap between diagnosed patients versus the prevalent population, particularly there's no drug approved to treat the disorder. When you have a drug approved anytime you see that gap narrow. And so we would expect that we will see the diagnosed population increase. The rate at which that increases, the rate at which the incident population feeds in beyond the prevalent population are, of course, going to be important determinants of when we peak. So we haven't guided and we're not guiding at this time in terms of when we would peak. But I would say the dynamics are very similar across rare diseases typically. And when you have no drug previously approved and that is you have a very sizable prevalent population that you get access to as quickly as you can, we're obviously very, very focused on that, and just very, very happy with the results we have today.

Operator

operator
#41

Our next question comes from the line of Tess Romero with JPMorgan.

Tessa Romero

analyst
#42

Steve and team, congrats on the progress here. First question from us is if you can provide any further granularity on what the right way to think about it for your persistence that you're assuming for the $45 million to $55 million in net sales for 3Q. Curious, are there any changes with respect to what you are hearing on how long physicians will try the drug before assessing for a treatment benefit. And then the second question is a little bit more big picture. It's really around what the key focus areas for physician education are for you going forward now that you have some time under your belt, where there are gaps in knowledge that you're hoping to fill?

Stephen Davis

executive
#43

Okay. Mark, I'm going to ask you to take the first question, Brendan, the second and third.

Mark Schneyer

executive
#44

Yes. I think for us, clearly, we've done a range. But keep in mind, at this early stage of the launch, right, it's as much kind of the impact from new patients as it is from continuing patients. And the most -- we've mentioned in our prepared remarks, most of our patients only have had like 1, maybe 2 scripts. So they're very early in their life of treatment. We're very encouraged by what we're hearing through our family access managers and our sales reps of how HCPs as well as caregivers really want to give their loved ones and patients are really fair shot at seeing the benefits that come from DAYBUE. So with all of that, that's considered in kind of what we look at for forecast in the very near term. And then in the long term, we, of course, we're going to be monitoring compliance levels and persistency. But as I said earlier that information at this couple of months into launch, we really don't have great actual data for yet.

Brendan Teehan

executive
#45

Yes. Thanks, Mark, and Tess, thanks so much for each of the questions. When it comes to clinical benefits, I think one of the more heartening things that we've seen since the introduction of DAYBUE has been the interaction between caregivers and our family access manager team. The degree to which there are conversations taking place about the day-to-day benefits even early on, that these families are seeing. And as I said in my prepared remarks, sometimes there can be improvements that the family is seeing for the first time in a very long time or they can be improvements that are -- they can be changes that are noted for the very first time ever. Those are paramount to the conversations that are going to take place between the caregiver and Rett treaters about the progress of patients on DAYBUE over time. And so we are certainly working to facilitate those discussions and create that dialogue so that clinicians have a very clear understanding of the day-to-day benefits that are seen. Even before we launched DAYBUE, clinicians would remind us that the caregivers spend 99.9% of their time with these patients. And so they look to them to find what those clinical benefits are that they're seeing that they wish to continue to pursue. And then, of course, they, during Rett Clinic days, will be able to see for themselves the changes that are noted in the young women, girls, boys and men that are treated with DAYBUE. And then over time, this question of education, it does come back to a little bit of what I just said, making sure that there's clarity on what treating the core symptoms of Rett syndrome really look like and how those translate into day-to-day benefits that we're already hearing these families want to not only are noticing early, but are hoping to see and improve over time. So that's definitely one of our key areas of focus. And then the second, which is, I think, equally important why we created this surround sound around patient support is around understanding the label and making the very best decisions on GI -- as you know, we have a very explicit language in the label to make sure that you discontinue anti-constipation medicines, which I think has been very helpful. but also to make sure that they're progressing through a logical process to make sure they're managing diarrhea if and when that occurs.

Operator

operator
#46

Our next question comes from the line of Ami Fadia with Needham.

Ami Fadia

analyst
#47

Congratulations on the great initial performance and the deal today. I had a couple of quick questions. Firstly, has there been a change in kind of how you are thinking about the compliance rate prior to the initial launch versus today? And can you give us some color on how long do you think patients need to be treated before the caregivers and the physicians can start to see some of the benefits from treatment or disease? What are the expectations that are being set with the caregivers when the patient starts treatment? And then I have a third -- very quick question on payers. You mentioned 20% of the target population coverage decisions have been made. When do you anticipate decisions for the remainder?

Stephen Davis

executive
#48

Yes. Thanks much, Ami, for the questions. I'll address the first one. Kathie, I'm going to ask you to address the time to benefits, and then Brendan I'll ask you to address the third question. So in terms of compliance, and maybe you should just confirm that role first speaking the same terms. By compliance, we mean compliance to dose. So how much of 100% of the dose is a patient actually taking about persistence, how long do they continue to take the drug. So on compliance, we expected that a lot of physicians would titrate and find the optimal dose or the best dose for each patient on a patient-by-patient basis. So from that perspective, it's gone exactly according to plan as we expected. We just don't have sufficient data yet to have a good picture on that compliance regimen nor but what dose will patients ultimately land. Again, we'll give better information on that as we go forward today, we have refill rates, but a refill rate doesn't really tell you much at this juncture and particularly given that we just have a month or, in some cases, 2 months of refill. So we don't really have a lot of that data. We will get as we go forward. I wish I could give you more clarity today, but we don't -- I would say just in terms of our expectations on compliance, it's very consistent so far with what we expected. Kathie, do you want to take the second question?

Kathie Bishop

executive
#49

Yes. On the time to benefit in setting expectations to benefit. Maybe I'll speak first about clinical trial data and how clinicians are initially using that to set expectations and then I'll ask Brendan to chime in about what we're hearing so far from the launch. So to remind you, the Phase III trial was a 12-week trial where we saw statistical significance from placebo but we did have 1 month and 2 months' time points and did see an improvement at those early time points as well. And then as we've previously talked about, we also followed patients in open-label extension studies. And beyond that first 3 months, we continue to see benefit on both of our clinical outcome measures, the RSBQ and the CGI-I over the long term, that benefit increases and becomes greater in magnitude. So based on that data, I think a lot of the clinicians have sort of set the expectation that parents should try and stick with it and be on job for about 3 months or 90 days, and it takes that long to see benefit. But I think -- I'll pass it over to Brendan to describe the reports we're hearing at this early stage is certainly we're very heartened to hear of improvements and benefits much earlier than that from caregivers and clinicians.

Brendan Teehan

executive
#50

Yes. Thanks very much, Kathie. And I would go to the first point that it was a study with a 12-week endpoint. So I think practically speaking, physicians are saying a couple of things with no approved therapy prior to DAYBUE with a study that demonstrated benefits and increasing benefits through the 12-week time period, they really are encouraging families to give the product time to demonstrate that benefit. And so they are setting them up for a treatment journey that would be at least 3 months. Sometimes they even set it up to say, please give it even longer than that. And I think the mindset is, this is a product that you could be on for the duration for the long haul. And just building on Steve's earlier comments, the point around titration is essentially to get to the best dose that, that patient will benefit from. And if you start at a low dose, then you would expect that the magnitude of benefit that you would see might also take some time as you get to that optimal dose. So I think the community is working to make certain that this is a therapy that you're establishing for this patient and family for the long haul and setting appropriate expectations for that initial trial period. And then your last question was around payers. We have about 20%, give or take, of covered lives that have written plans that cover DAYBUE. I'll just remind you that because it's such a rare disease, there are certain payer plans that may never have a -- make a coverage decision and may manage the product through the medical exception and letter of medical necessity process, and we're obviously already dealing with that and very prepared to handle it. As for some of the Medicaid state decisions and some larger plans, I would expect we will continue to see and report back on increased payer coverage decisions in the next, I would say, 90 to 180 days.

Operator

operator
#51

Our next question comes from the line of Jason Butler with JMP Securities.

Jason Butler

analyst
#52

Let me add my congrats on all the positive news as well. A couple for me. First one on NNZ-2591. Just any early thoughts on how we should think about the development past year. Is it essentially following the same road map as trofinetide. And then from a mechanism perspective, is there any potential to combine the drug with trofinetide. And then on NUPLAZID guidance, just looking at the guidance for 2Q and then full year, it looks like you're essentially at the top end of the range, point to relatively flat sales in 3Q and 4Q over 2Q. Just any thoughts on the guidance there or the trends we might see in the second half of the year?

Stephen Davis

executive
#53

Yes. Thanks, Jason. Mark, do you want to take the last question, and Kathie will go back to you on the first question.

Mark Schneyer

executive
#54

So on NUPLAZID, we're continuing to see steady to -- above steady volumes on NUPLAZID, and we're pleased with the performance thus far this year. and we expect to continue that through the remainder of the year, and that's reflected in our kind of narrowed guidance at this stage.

Kathie Bishop

executive
#55

Okay. And then on NNZ-2591, on the mechanism question, so both NNZ-2591 and trofinetide are modified, more stable derivatives of parts of IGF-1. So we think they may have a similar mechanism of action, but there's no reason to believe that they might not be synergistic or additive. We don't have any data, but I wouldn't roll that out at this early stage. So that's something we'll think about it, explore now that we have access to the compound and can start to work on it. Similarly, I think it's a little bit too early to comment on what a development plan might look like for Rett. But we'll mention that NNZ-2591 has already completed a Phase I study. So if we were to move forward, we could start right away with Phase II, it's already clinical stage.

Operator

operator
#56

Our next question comes from the line of Paul Matteis with Stifel.

James Condulis

analyst
#57

This is James on for Paul. Just a quick payer one. I believe based on some prior commentary, you mentioned that a lot of the decisions could happen pretty quickly within 90 days or so. So just wondering if that 20% number is kind of tracking with your expectations and how you -- quickly you expect that number to ramp. And then just second, you mentioned these policy decisions are coming in line with your expectations. I'm just curious if you could expand on that a little bit and kind of what exactly was baked into those expectations?

Stephen Davis

executive
#58

Sure. Brendan?

Brendan Teehan

executive
#59

Yes, sure. Thank you very much for the question. I would say that the dynamics around access for patients are largely what we expected. As I said, in the early days, it's an interim period, I still consider as a [ net payee ] 90-day period, and most of what we've been reporting on would be any decisions made for coverage of patients, obviously, before that 30, 60 days into the launch. And in those cases, the vast majority of patients received access through a medical exception, letter of medical necessity, prior authorization process because there is no -- there was no written policy. As the written policies have come in, I think what we are noting is the payers have heard the message that this is a highly debilitating disease, that they understand the affected patient population and the size of that audience. And for that, we're seeing a number of the early plans that suggests an understanding of our label and the addressable population, male and female and much in line with what the label would suggest. The earlier plans that have written policies have not been surprising in terms of those that tend to lead the way. And I expect that as we get into this really first full quarter of launch or second quarter sequentially that we're getting into that, we'll start to see a ramp in payer policies. And as I said, over the next 90 to 180 days, I think most of those planned decisions will likely come to fruition.

Operator

operator
#60

Our next question comes from the line of Kyle Qian with Canaccord.

Kyle Qian

analyst
#61

This is Kyle speaking for Sumant Kulkarni and congrats on the progress. One question from us. You mentioned titration up in the majority of the patients. Could you disclose where the dose in dose titration is relative to the recommended dose on the label? Would it be 50%,25% -- just any number would be great for us.

Stephen Davis

executive
#62

Sure. We just don't have hard data on that because as I mentioned, while we know a significant majority of physicians are titrating up. They almost all of the time do not write the titration schedule in the prescription. So we just don't see it. But we know through our fans network that are interfacing with families on -- through the access process and thereafter. We know that through information collected from them that, again very much a benefit to titrate rate up and that the titration schedule is relatively quick. So it's within a week or 2, sometimes it's up to a month or so. But for the most part, they titrate up pretty quickly. And so again, as we get further into launch, we'll have better information on that, but today, that's as much as we know.

Operator

operator
#63

Our next question comes from the line of Jeffrey Hung with Morgan Stanley.

Michael Riad

analyst
#64

This is Michael Riad on for Jeff Hung. Congratulations on the launch progress. First, so you said the majority of patients are up titrating in the first few weeks in the month. Does this like at a high level, open up the potential is needed for down titrating instead of discontinuations. And I have a follow-up.

Stephen Davis

executive
#65

So why don't we that first. So just to be clear, -- so the data we have on trofinetide in terms of the effective dose is -- comes from our clinical studies. In rare diseases [indiscernible] you just don't have the luxury doing a lot of dose ranging and so the data we have in our lab in our Phase III study is all at 1 dose, but we do have data from an earlier Phase II study that Neuren conducted a successful Phase II study where they saw a statistically significant benefit that was approximately 2/3 of the dose that we are approved at. So we knew that, and we do through the experience we had in our LAVENDER study and beyond that titrating up or down can be very beneficial. And so we were pleased to make that part of our GI management recommendations and get reference to that in the label. So in terms of what physicians are actually doing, they're doing what we believe they should be doing and there's a real benefit to it and that is titrating to get to the best dose on a patient-by-patient basis.

Michael Riad

analyst
#66

Okay. That's very helpful. And then maybe just a second question on NNZ-2591. Could you talk about the rationale for pursuing Fragile X. Was there anything you learned with DAYBUE and that gave you greater confidence in prioritizing Fragile X in your discussions in Neuren.

Stephen Davis

executive
#67

Kathie is going to take that.

Kathie Bishop

executive
#68

Yes. For NNZ-2591, of course, before we license it in, we did diligence. And Neuren has conducted preclinical studies in a mouse model of Fragile X, which looked, I think, quite positive. So that, combined with that it is a clinical stage compound, I think, gives us great confidence in moving ahead in that indication.

Operator

operator
#69

[Operator Instructions]. Our final question comes from the line of Uy Ear with Mizuho.

Uy Ear

analyst
#70

Congrats guys on the good start to DAYBUE. So I guess, my first question is, would you be able to provide a split between the -- in terms of percentage, the percent of patients who rolled over from the long-term extension study and the de novo patients for the first quarter? And, I guess, the second question I have is, so you mentioned the dose of titrating these patients. Just curious -- or I don't know how long -- just wondering -- are you seeing scripts lasting longer than a month long on the first scripts because of the need for titration? And just curious about how long it would take for patients to refill their scripts.

Stephen Davis

executive
#71

Yes. Thank you so much. I'll take the first one and ask Brendan to answer the second one. Just in terms of the proportion of split between rollover patients and total patients on therapy, we're not providing that information at this juncture. Patient data of patient numbers, script numbers, et cetera, are the type of thing that we think it's still moving a lot. There's still a lot of moving parts in general. And we felt like at this juncture, the best information that we can provide you is to give you a range for what the -- we expect revenues to be in the next quarter. The range that we provided is based upon very solid data. So we have a very good view of what we expect the range to be going forward. And it's reflective of the very strong start that we have at this juncture. So we've had to go that route in trying to give a lot of individual data points that in isolation would be more difficult to synthesize and get to the right number, we felt like it's better just to give you the range -- give you the guidance range.

Brendan Teehan

executive
#72

Yes. And thanks for the question on titration and maybe supply of product as well. And I think we said it in our -- in some of the earlier remarks. But oftentimes, the clinician will be telling the caregiver verbally what they want -- what they think titration should be. And so the written or prescribed dose that shows up at our specialty pharmacy is more often, perhaps through the appropriate dose for the weight band for the patient with a verbal titration schedule that is agreed upon between clinician and family. . And that can vary based on an individual clinician's experience or conversations they've had with people that have more experience with DAYBUE. So there's a reasonable degree of variability there. So it's difficult to tell you over time what might happen as they kind of settle into the most appropriate dose. The initial doses don't -- the initial approved or prescribed dose may not give us full insight into that.

Uy Ear

analyst
#73

Can I sneak in a last question, sorry. You provided guidance, I guess, for the revenue. Just wondering if there's anything in expenses that we should sort of watch out for?

Stephen Davis

executive
#74

Mark, do you want to take that?

Mark Schneyer

executive
#75

Nothing on expenses to watch for. We'll give a complete report when we get into our full second quarter earnings in another few weeks.

Operator

operator
#76

At this time, I would now like to turn the call back to Steve Davis for closing remarks.

Stephen Davis

executive
#77

Great. Thank you, operator, and thanks again, everyone, for joining us today. We look forward to updating you on our progress.

Operator

operator
#78

Ladies and gentlemen, that concludes today's conference call. Thank you for your participation. You may now disconnect.

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