Catalyst Pharmaceuticals, Inc. (CPRX) Earnings Call Transcript & Summary
October 7, 2024
Earnings Call Speaker Segments
Operator
operatorLadies and gentlemen, the program is about to begin. At this time, it is my pleasure to turn the program over to Jason.
Jason Gerberry
analystGood day, everybody, and thanks for joining us at the next company presenter at the BofA CNS Day event. And I'm pleased to be introducing Catalyst Pharma and CEO, Richard Daly; and Chief Operating Officer and Chief Scientific Officer, Steve Miller. So gentlemen, thanks for joining us. And I imagine we'll have a pretty lively discussion on things ranging from BD to the AGAMREE launch to all things with your core business for LEMS as well. So maybe as a starting point, I think strategy BD is a good place to start. Since I've been following catalyst, BD's always been kind of a critical component of the story. Assets that you've brought on board, you've been able to do it and do it in a way that hasn't put leverage on the company. And so that's -- I guess then the question becomes the ability to scale that model and to continue to bring in assets that could accelerate the growth profile, diversify the business and all those things. So maybe for starters, why neurological disorders and neuromuscular disorders as a therapy area of focus? Is this an area you feel like, hey, we've got the in-house expertise, and so we really want to leverage that? Is it just an attractive category for therapeutic opportunities and you see just an opportunity to scale there. Maybe if you could just sort of level set on first your TA focus and then we can go drill down into that.
Richard John Daly
executiveWell, Jason, thanks very much for having us. We really appreciate the opportunity to be with you today. So thanks. Yes, the CNS area is very attractive. And when we entered it with FIRDAPSE, we're very excited to be in it, and we have internal expertise on it. As you know, we purchased the drug. We got the drug in-house. We are a buy-and-build company, and we developed a drug. We brought it in-house, developed a drug, took to the FDA and got it on the market. It was a very, very successful launch and continues to be a very successful product. We like the CNS space. Drug has been on the market for 5 years. And in that time, the CNS space has changed pretty significantly. If you look at a lot of the forecast about what's happening in the CNS space, a lot of the opportunity in CNS has got to come from movement disorders. And a lot of larger companies are really looking at that opportunity to play in that space. And that's great for, I think, for patients. For us, we think we need to actually look a little bit more broadly to be able to compete for a company our size to stay in the orphan space and look for opportunities and continue to build our company. We like CNS. We have internal expertise, but we believe our infrastructure and the way we go to market and the execution story that we have, we believe we compete across the board in the orphan space. And so we continue to look for opportunities, not only in CNS, but also in areas that are adjacent to CNS in the orphan space.
Jason Gerberry
analystGot it. Okay. How about the deal landscape right now? Do you feel like it's asset-rich? Do you think that there's -- how is the temperature on seller willingness to part ways with assets? When we just did a recent M&A analysis and some of the trends seem to be that we're seeing more privates getting sold. Maybe that's a function of a more challenging IPO market for some of those companies. So just kind of curious what you're seeing and if it's a healthy environment for somebody that's on the prowl for quality assets.
Richard John Daly
executiveWe think -- we believe it is a healthy environment, especially as we increase our aperture for these opportunities. At any point in time, we're engaged in a number of discussions, multiple discussions with folks whether or not the seller has a realistic view of the value of their asset and whether it fits with us, those are things that we always gauge and we're looking for those opportunities all the time. And so having a discussion about where it fits, what's the appropriate price point, those kinds of things, that's always ongoing. And quite frankly, that's resident in any market at any point in time. But we are seeing opportunities out there, and we're going to continue to -- we're going to continue to discriminate and make sure that these opportunities fit us and we can do the best for our partner when we go forward.
Jason Gerberry
analystAnd how important is it to do another deal in, say, the next 12 months or so?
Richard John Daly
executiveWe look at our success with FIRDAPSE and the success we've had in bringing that product to market into the 15% to 20% growth year-over-year, continuing 5 years in, we're really happy with that execution. We look at FYCOMPA. FYCOMPA was essentially a transaction, a financial transaction for us in the epilepsy space. It gave us diversity of income. We like that. We integrated that very quickly. We digested that deal very quickly. We brought a lot of good talent with it as well from the sales side and the execution side. And then we look at the AGAMREE launch, and we see that, again, execution. So we believe we've digested these opportunities and integrated them into the organization in a really solid way, in a very, very quick way. And so we believe we can bring another product on, but I think it gets down to fit. How well it could fit and does it help us get where we want to go? Is it immediately accretive? Is it nearly immediately accretive? And does it fit where we want to go?
Jason Gerberry
analystOkay. And I guess for investors thinking about the business model, I know at different times, maybe it was past management regime talking about like Horizon Therapeutics as a company that maybe is a template to look at. Do you feel like deal activity is a source of synergies for you as a company? Or is it just more a mechanism for growth feeding the pipeline than it is necessarily like a synergy play?
Richard John Daly
executiveI think it's a growth opportunity. We run a really lean shop. Steve can speak to this as the Chief Operating Officer as well. We run a really lean shop, and we think that we can bring value to these new opportunities and not necessarily from an acquisition standpoint, but from a partnership standpoint, but open to acquisitions as well, looking for that best opportunity that fits right now. We want to work our way and thinking about the Horizon opportunity or the Horizon model work our way back in that pipeline. We want to give you the opportunity to value the future and be able to put a PTS on our future as well. And so that we can really get that multiple that really makes a lot of sense for our business. And essentially what Horizon did as well. So we really think that we can do that going forward. So we're really confident in our future.
Jason Gerberry
analystOkay. In terms of the next step in the evolution of the company and the ability to source in drugs with even larger peak sales potential. I don't know if you think that, that may involve leverage and thinking just about the company's just dry powder and capacity to do the deal, how would you frame that for investors?
Richard John Daly
executiveSo we -- you know we have no debt right now. We're bringing in close to $40 million a quarter on the bottom line. We feel really comfortable. We have almost $400 million on the balance sheet to put to work. So combination of the opportunity to look at deal size, we think we're really comfortable doing one deal or multiple deals to really bring balance to our income statement and strength to the company to go forward to do incremental deals as we go forward. We could do upwards of $600 million, $700 million, $800 million in total deal size with multiple deals as well. So we feel really comfortable in that range right now. And then obviously, as we bring more income in, we'd be looking for even greater opportunity going forward.
Jason Gerberry
analystMaybe shifting gears to the AGAMREE launch, which is a big area of focus, I think, with investors. And anything you can share as it pertains to early launch observations, how it's gone relative to expectations? Is EMFLAZA still is a good launch comp when you think about patient accruals and just sort of our revenue trajectory. So I'll leave that with you guys.
Richard John Daly
executiveYes. So Steve can speak to the product profile and how it's playing out in the marketplace. But I think EMFLAZA is a good launch surrogate for us. The key difference between our launch and the EMFLAZA's launch besides product profile is when EMFLAZA launch, there was no countervailing voice in the market. EMFLAZA launched into essentially a greenfield. They launched with prednisone as the only competitor, and there was no voice going against them. We're launching into a market where we not only have prednisone EMFLAZA, but also generic EMFLAZA. And when we frame it up that way, this launch is going extremely well. And to your point, I think from a patient accretion or patient accrual standpoint, I think the EMFLAZA launch is a very good surrogate for us going forward.
Jason Gerberry
analystYou used the term counter voice. So is PTC active still in sort of promoting EMFLAZA even though this is the generic available? I know that there's some -- you hear some things about stickiness of the brand and maybe that market is not genericizing that efficiently. So I was just curious if there's something going on that's unique there? Or are you really the only brand and the only voice in the steroid space?
Richard John Daly
executiveOur understanding is they're out there and they're promoting the product yes. So they're there.
Jason Gerberry
analystGot it. And the current mix of patients, I think with -- I guess it sounds like there's a pretty healthy mix of both, right, EMFLAZA and prednisone. And if you can maybe speak to that dynamic and yes, maybe we'll go from there.
Richard John Daly
executiveSo we have a proprietary pharmacy where we source all of our patients through a single point. And so we have a great deal with insight into the patients. Obviously, it's in a HIPAA-compliant way, which is fantastic. So we get this great data-rich environment. And so we've seen since we started enrolling patients 3 months prior to the launch of the product. We launched -- we started rolling December 1 of last year, launched on March 13. We started seeing a split on how the patient mix coming in, where the patient is sourcing from. And when we launched or are to launch, we thought we would source most of our patients from EMFLAZA, which we believe has about 30%, 35% of the market. Turns out, we're getting about half of our patients from EMFLAZA and half of our patients from prednisone. So instead of playing in that 35% of the market, we're actually playing in 100% of the market, which is tremendous. I think that speaks to a tremendous upside opportunity in the long run. So that not only happened prior to the launch as we were loading the patients into the queue, but it continues today. So we're really excited that this is an ongoing opportunity for the brand.
Jason Gerberry
analystOkay. And I know since we last spoke on 2Q update, it sounded like the payer landscape was largely single generic step edit. Here we are in the fall when companies typically have a better line of sight into 2025. Is it still the operating assumption that most plans will be more of a single generic step edit for AGAMREE?
Richard John Daly
executiveGreat question. So when you look at the shape of this market, 11,000, 13,000 boys and young men had this condition and 90% of them have been treated at some point in time. So they've experienced prednisone. They've likely experienced EMFLAZA. They're not going to go back and experience generic EMFLAZA. So by the time they get to us, they've already stepped through 2 things. So we're not experiencing any significant pushback because these young boys and men have experienced the drugs that are available for them already. So we don't have any significant change going forward.
Jason Gerberry
analystAnd so the way that these policies -- I haven't looked at a specific policy, but it's more of a lifetime thing, right? Like you've been on prednisone 2 years ago, 3 years ago, that constitutes a step through it's not in the calendar year such that like when everything resets GEN-1 hit to trial, a specific generic option?
Richard John Daly
executiveI think it can vary by plan, but it would be unusual that a physician would allow that to happen in my experience that they would say that this young man has been on this product before it didn't work for him. We're going to go to seep through. Remember, there are about 100 centers of excellence and about 250 physicians. And generally, these young men stay with their physician for a long, long time. So the physician knows that they're intimate with these young men and their treatment history. So it's really good, easy for them to defend their decision to the insurance carrier.
Jason Gerberry
analystAnd I guess, the recent broadening of the label for gene therapy, just curious at all, I mean, typically, when we talk to doctors, they say that the availability of gene therapy is not really going to impact how they use steroids at all, but figured I would just ask, given that you guys are out there, you're monitoring the space a lot more closely.
Richard John Daly
executiveSteve, do you want to take that one?
Steven Miller
executiveSure. Thank you, Jason. The comment you just made about what the doctors are saying, that's exactly what we hear in the field. Also, that steroids remain the backbone of therapy for these patients. And our expectation is that with the use of the gene therapy that they'll be using whatever the background of steroids that they continue to need. These gene therapies also require immunosuppressive dose of steroids. And typically, if the patient is [indiscernible] what a physician would do is need them on a [indiscernible] would do is need them on a GAR and additional prednisone to take them up to an immunosuppressive dose for a period of time.
Jason Gerberry
analystOkay. In terms of where we're at year 1 of the launch story and sort of how that evolves in time, is there additional data generation that's critical to the adoption story? Or do you feel like you have the information largely on hand to educate providers? And so really, it's just about familiarity, blocking and tackling, getting in front of doctors, making them aware of the AGAMREE value proposition at this point?
Richard John Daly
executiveWe believe that the product is significantly differentiated from competitors. And there are 4 essential things that will differentiate the product. One is behavior, and the physician can see that right away. So there's a certain tenancy of these young men to get -- develop aggressive tendencies on steroids. And you can see behavior improvement of these young men almost immediately according to what we're getting back from the physician. But Steve can speak to the other 3 benefits that will take time in the SUMMIT study that we put into place put in place to track the benefits here that we expect to see over time. Steve?
Steven Miller
executiveYes. As Rich mentioned, we have this long-term study going on. It's targeted for about 5 years, could actually go longer. We'll be analyzing that data approximately once a year, but we'll be looking at it on a blinded basis continuously. Obviously, you give up Alpha every time you do an analysis, you want to limit how many times you do the analysis. But having said that, we'll be looking at the data periodically hoping at the very least to publish additional beneficial data about the drug and perhaps update the label for the product as well. With regard to the other benefits that are seen, there's already information in the literature about bone growth improvement using vamorolone to treat DMD relative to prednisone. And we expect to see burn density improvements and cardiovascular improvements as well. And there's a number of endpoints that are being monitored in the SUMMIT study where we will gather that data and over a period of time, have something more material to say about the cardiovascular safety relative to other strains for gaming.
Jason Gerberry
analystYes. Ultimately, how those data play into the launch? I imagine that there -- even if you look at the EMFLAZA launch like there just are always going to be, I guess, legacy doctors who hold out and use prednisone for really long time and maybe have prescribing tendencies that are more difficult to shake or change, if you will. So is this something that you feel like helps with some of those doctors who may be a little bit more "stuck" in their ways? Or how would you think about the data potentially being leveraged?
Steven Miller
executiveWell, I would think that the data would be very helpful for the more traditional doctors who decide I'm going to use prednisone. That's what I've always used. Our medical science liaisons will be out there actively informing the doctors about what's [indiscernible]. One of the nice things that is -- are the benefits of these patients is that it's a very small community of physicians who treat those patients and a number of them participating in the clinical trial and those doctors talk to other doctors or they are in institutions where there's other DMD doctors, and they talk to each other about the treatment of patients. The bottom line is during the clinical trial and the safety follow-up phase that followed it, doctors actually have the opportunity to ensure clearly the improvement in behavior because that shows up right away. But there was even some patients who on the AGAMREE long enough for doctors to see a notable difference in birth relative to what they normally see for corticosteroid treatment. So there's already a number of doctors that are enthused about using the product.
Richard John Daly
executiveOn that point, Jason, by the end of the second quarter, 80% of other centers of excellence had written a prescription at 140 of the 250 target physicians had written a prescription. So we're seeing tremendous depth here and breadth. So we're really excited about the uptake. And there are going to be some physicians who say, "Hey, listen, I'm not really that interested or let me see more data. But our focus right now is on increasing the branding, expanding and then going deeper into these institutions. But we're having tremendous success so far. So we're really excited about the success of the product.
Jason Gerberry
analystYes. Within that 80%, because I know leading into your second quarter update, I think you'd mentioned that a certain proportion had written at least one script. Can you share anything more as it pertains to sort of the depth that you're seeing? Is it clustered in a smaller subset? Or is it pretty evenly distributed? And it's more about just sort of broadening the impact within that 80%? Or is there -- like in any disease area, right? There tends to be a top 20% that really can drive a lot of the business.
Richard John Daly
executiveYes. Right now, it's more along the lines of a Pareto, if you think, you're getting the early adopters, which is classic in my experience in the launch side done. You're getting the classic rapid adopters, early adopters in and they're having influence over the other physicians with whom they work. And we're seeing that the spread, and it continues over time. So we're really happy with where we're going with this.
Jason Gerberry
analystGot it. Okay. So what else -- can you maybe just discuss your peak sales outlook and some of the assumptions that are embedded in that for AGAMREE?
Richard John Daly
executiveWell, so we haven't given any guidance on peak. But one of the things that we -- I think is really important to talk about is right now, we're getting generally older young men or patients at this point in time. And so we expect over time, and this is a good thing. And so I just want to phrase it and position as such that the -- we expect over time as physicians get more comfortable and we get earlier -- get the later adopters in here into the queue, we'll expect that we'll get younger patients, and this is a product that's dosed by weight. So we'll get more patients, they'll be lighter and the average price of the product will likely come down. But that's good because those patients will generally be on for a longer period of time. So we're seeing a higher price at this point in time, but it will come down over time, not by much, but it will come down slightly, but we'll have a greater pool of patients on for a longer period of time. So we're excited about this, and we're getting great insurance coverage, almost 89%, almost 90% of the patients are paid for at this point in time, and they're getting their insurance approved in less than 30 days. So they're getting -- we're getting a really rapid turnaround. So we're excited about where we're going with the product.
Jason Gerberry
analystYou make an interesting point about, I guess, younger, maybe patients with less -- way less but staying on drug for a long period of time. One trend that's happened in the DMD space, I believe, is that doctors have kept patients on steroid longer than they might have otherwise, right? So I think maybe historically, if the patient had become nonambulatory, it might have been a decision point to maybe take the patient off. But now I think the realization that like that you can derive improvements on upper limbs and things like that even if the patient is nonambulatory. So I guess thinking about just the space more broadly and how maybe treatment rates have evolved? And maybe how you think about like durations of therapy. These are concepts I imagine that are fluid that you're still monitoring data to better understand. But it does seem like there are some moving parts that maybe are worth of discussion that like could be beneficial to the revenue story of AGAMREE?
Richard John Daly
executiveAnd I think this is another great point. So 90% of patients in this -- in DMD have been on a steroid at some point in time, but only 70% are on today, which says there's a gap. And so what is that gap? And so the gap is that generally, we call it the problem of the TOOs, T-O-O. Physicians start too late, they dosed too low and they stop too soon because of the behavior the bone growth and the bone density and some of the cardiovascular issues. Those are all the things that Steve talked about. If you can address those issues, there's an opportunity for the patient to start sooner, get the right dose and stay out longer. And especially when a patient, as you pointed out, Jason, if a patient becomes nonambulatory, the patients and the physicians and the caregivers we talk to talk about the window that the patient has, this young man has as he becomes nonambulatory. It's the ability to control the wheelchair and the ability to control the mouse because the view of the world then becomes, how do I move about the world and how do we interact with the world. And the ability to use your hands becomes critical to success. And so keeping that patient on steroids and maintaining as much movement capability as possible is foundational to success for that young man. So we see this as a great opportunity to use Summit the SUMMIT study to bear out that the drug is making a difference. And you can start earlier, keep them on the right dose and keep them on longer.
Jason Gerberry
analystRight. And I guess, mindful that you haven't guided to peak sales, and I should have known that or recall that. But I believe that there was some commentary that maybe a peak penetration at levels of EMFLAZA, which were 30% to 40%, maybe as a reasonable base case. I don't know if that's something that's evolving or something that has the potential for upside, you see a greater ability to play in both the prednisone segment and the EMFLAZA segment?
Richard John Daly
executiveSo when you think about the situation where I think AGAMREE has the opportunity to foundationally change the marketplace. So only 70% of patients are treated. So I think there's upside there. I think we have a better profile. So I think when we say what's the market share in an expanded space, we could end up with less market share, but bigger opportunity. We could end up with more market share because we have a better drug. We haven't guided even on market share, but I do think that the uptake in the first couple of years of launch, I think the uptake is probably pretty good. I think the EMFLAZA model is probably a pretty good one for us.
Jason Gerberry
analystTo the point about weight and weight base and perhaps on a revenue per patient basis, your point is, maybe that's a little lighter in the early years of the launch. If over time as these boys grow, I'm trying to get a sense of like what perhaps revenue per patient could look like on your therapy, say, versus EMFLAZA during pregeneric levels? And if there's a benefit, right, in terms of kind of overall net pricing per patient? And how you'd sort of frame -- I realize it's probably a complicated question with a lot of moving parts. But if you were, say, today where you sit versus perhaps or broadly penetrated into the market, does that change in a meaningful way?
Richard John Daly
executiveI think in the first couple of years, I think it's probably pretty similar because I think that the benefit that EMFLAZA brought to the market, the perceived benefit they brought to the market versus prednisone. I think they had a good uptake, a solid uptake, and you got those patients that were looking for something different. Those patients who were frustrated. And so you probably got the patients who are older and thus heavier who experienced a lot of prednisone challenges. And then it works its way backwards. I think that's a natural order and the natural cadence of the market, if you will. And I think we'll probably -- you can, again, probably look at EMFLAZA as a good surrogate for this.
Jason Gerberry
analystOkay. With EMFLAZA, I believe that, that was a drug that effectively saw a lot of discounting and rebating a gross to net spread that widened later in the product life cycle. Is there something inherent in this marketplace with sort of the payer mix as you get bigger and more successful that where there's a greater toll, if you will, that drives that gross to net expansion? Or do you feel like sort of where you operate in years one through 3 is a good operating assumption for like the long run? .
Richard John Daly
executiveI don't know of anything at this point in time that would change -- the patient population is very stable. It's about a 50-50 split between Medicaid and commercial. I think you'd have to make a choice based on the competitive set to want to do that. I don't see it changing all that much in years 1 to 3 and then beyond.
Jason Gerberry
analystOkay. And then maybe last question on AGAMREE unless there's anything else that we feel like we've missed and you want to touch on. But one of the assumptions I feel in the Catalyst Pharma valuation model that there's a lot of sensitivity around is how you model different exclusivity runways, right? So -- and we can get to that with FIRDAPSE, but with the AGAMREE, you have at a minimum 7-year orphan exclusivity. And so that's great. Maybe how you think about this asset and its runway and sort of what you'd say is your anchor patent and where that gets you?
Richard John Daly
executiveSteve?
Steven Miller
executiveSure. Well, you mentioned the exclusivity. Obviously, there's orphan drug exclusivity for that product. Effectively, it will take us to early 2031 because where it's combined with Paragraph IV as you now see, I won't go into a lot of the complexities unless we'd like to. But the bottom line is that the earliest entry based on that theoretically would be early 2031. However, there's also patents. There are 3 inpatient patents, one of which will be extended in June of 2034. There also are 2 polymorph patents that will get protection to July of 2040 and a cardiovascular safety patent that provides protection until 2033.
Jason Gerberry
analystI see. So the IP can maybe add 3, 4 years to the -- what the regulatory gets you?
Steven Miller
executiveTheoretically, with the polymorph patents, it could add up to 10.
Jason Gerberry
analystPolymorph runs to 2040?
Steven Miller
executive2040, correct.
Jason Gerberry
analystOkay. In that polymorph, I imagine -- is it like a stability, it's the rationale for the patentability?
Steven Miller
executiveIt's a particular crystal form of the drug that's polymorph Form 1. There actually are several polymorph, but the drug is fairly unique. It has a tendency to undergo change in the solid state to the Form 1 polymor while sitting on the shelf. So as a result of that, polymorph patents can sometimes not be particularly useful if someone can make an alternate polymorph. But when the other polymorphs spontaneously transition back to the Form 1 polymer actually another patent that could be much more for protection.
Jason Gerberry
analystOkay. So it sounds like things are going well with the AGAMREE launch overall, that momentum that you're seeing. Anything else that you guys would flag on AGAMREE?
Richard John Daly
executiveVery happy with the launch. Pretty happy.
Jason Gerberry
analystOkay. Well, maybe shifting gears to FIRDAPSE, your largest product. And yes. I mean do you -- what are you seeing first half in terms of what's driving this mid- to high teens year-on-year growth if you combine first and second quarter, I'd like to zoom out and not think about these revenues on a quarterly basis because 1Q so kind of anomalous in a lot of ways. So yes, I mean, in terms of like where you're sourcing that increased market penetration, the dynamic with small cell lung as well?
Richard John Daly
executiveSure. So we are -- we have this pipeline of patients. So it's a very challenging disease to diagnose and to treat. So there's 2 types of labs. There's the idiosyncratic or the non-tumor LEMS and then the tumor LEMS. So the idiosyncratic is about 80% of our business. And that's about 18 months from first symptom to getting on drug. And so the most frequent misdiagnosis is myasthenia gravis. And so when we see a prescription written for certain drugs that might be myasthenia gravis, we actually send some of our sales representatives in to talk to the doctor because the average doctor sees one LEMS patient in their entire career. We help educate the doc, and we keep track of these in a HIPAA-compliant way, keep track of these patients as they move through their therapeutic and diagnostic journey. And half of our patients come from this pipeline of patients that we keep. And we talk to the doctor and every quarter, quarter-on-quarter, year-on-year, 15% to 20% growth is really driven by this tracking of these misdiagnosed patients. On the tumor LEMS side, we're working with thoracic oncology centers. That's a much more concentrated opportunity. You work your way down from the number of diagnoses to small cell lung cancer because that's the most common cancer that just is associated with to the number of tumor LEMS patients and you can get upwards of 900 patients a year with tumor LEMS, and we're working with those oncology treatment centers to get better diagnosis there. We assume that only about 3%, 4% of those patients are actually ever diagnosed with LEMS. And it accounts for about 20%, 25% of our treatments that are patients that are being treated right now. So our goal is to lift that number up on the oncology side.
Jason Gerberry
analystWhen you get a tumor LEMS patient, do they tend to -- are they sticky, they stay on therapy? There's this idea, I guess, that with the chemo if the tumor goes away, the LEMS goes away. And so I just wondered if there's a dynamic with tumor LEMS patients that maybe aren't on therapy as long?
Richard John Daly
executiveSo we track them in a de-identified way, so we can track them by number, not by name, obviously, and we track them and they stay on for a long time. The average small cell lung cancer patient lives 7 months. The average tumor lens patient lives 17 months. So the -- and the average -- the average idiosyncratic LEMS patient lives a normal lifespan. So you're seeing this tumor LEMS patients live more than twice as long as a small cell lung cancer patient. So -- and they do stay on for a long time. So they're getting the benefit of the drug, even though the cancer has been treated and Steve can speak to some of the scientific components of it, the even though they're treated for the cancer, LEMS is still there, and they're needing therapy and perhaps makes a difference for that patient.
Steven Miller
executiveI just wanted to add one things also about the thought that when the cancer goes into remission were LEMS goes away. There may be some rare instances where that happens in patients. But remember that once you LEMS system is programmed to generate autoantibodies to particular epitope even though the epitope present on the carcinoma may be gone in the carcinoma has been remission that those antibodies also attack fret calcium channels and those Fret calcium channels are an epitope that we not in the human body forever. So the immune system in the vast majority of cases continues to respond in carcinoma.
Jason Gerberry
analystOkay. So I wanted to come back to the point you made about the MG diagnosis and that's an initial diagnosis, right, that tends to be the trigger. So if -- I don't know, there are new therapies that are -- have come to market with the FcRn class of recent. But my understanding at least is that that's kind of more of a switch opportunity from someone who's maybe been on IVIG. So -- but I wanted to ask you, has that been a catalyst at all for increase in diagnosis rates and thus, maybe becomes a product feeder for you in a way, for lack of a better term or if it's really irrelevant, right, to kind of the MG diagnosis rate?
Richard John Daly
executiveSo we haven't seen an increase in the diagnostic -- the diagnosis of MG. We haven't seen the data yet. So we'll continue to look for that. or at least we haven't seen an increase in the therapies across the board. So it's not affected us yet. We'll continue to look for it, though.
Jason Gerberry
analystAnd so the typical pattern there, though, is that you -- there was a discussion with the clinician and then there -- they're making a confirmatory diagnosis with the diagnostic and then switching the patient off of something like an IVIG or their FcRn over to FIRDAPSE. Is that typically what happens then?
Richard John Daly
executiveOver time, yes. There's -- it's a dialogue that goes on for quite some time.
Jason Gerberry
analystGot it. And then you mentioned small cell. And I guess, so yes, I guess, on the one hand, when I first started to think about this concept, right, oncology is pretty vast, pretty expansive area. So was this going to entail a full-blown kind of commercial oncology sales force build out, but it sounds like there's some concentrated oncology centers that you work with. Can you elaborate a little bit more on the strategy and how you're able to have that reach without massively reconfiguring your sales organization?
Richard John Daly
executiveWe see, we are very -- we have a very targeted approach to everything that we do. We're not interested in being a retail -- in the retail space in the long run. So having managed very large organizations. It's not my intent to bring this organization into the retail sphere. So when we see an opportunity where we know exactly where to go, and we can grow the business, we're going to take advantage of that. So there's an opportunity with these thoracic oncology centers to work with these physicians who treat a large volume of cancer patients, lung cancer patients and then it's just a matter of math that if you're treating a large number of oncology cancer patients or lung cancer patients, we're just going to work our way down to the bottom of the funnel and then have them connect with their neurology colleagues to do the VGCC testing and then the treatment and working in a peer-to-peer relationship. So there's an understanding. And that's how we're going to grow the business. We don't need to create large sales forces for this. We could be very targeted and be very successful.
Jason Gerberry
analystIs there some sort of -- can you just remind me the number of these centers and how -- what proportion of small cell lung is sort of captured in that? And is there -- has there been -- maybe what's been the trend in like the last 3 or 4 years with this -- you said at some point, maybe 3% to 4%, then you said 20% to 25% are not treated. So just maybe how we're seeing the progress here.
Richard John Daly
executiveSo until last year, there wasn't a true diagnostic code for small cell lung cancer. So it's very hard to track exactly where these are. So we're going to the 50 largest centers and talking to the 50 largest centers and focusing our effort on the 50 largest lung cancer centers in the U.S. That's how we're doing it and working our way through there because just by -- as I said, just a matter of diagnosis by exclusion or inclusion however you want to say it, just like these are the largest centers, therefore, they're going to have the highest likelihood of having these patients. As we start to develop the data set because of the new ICD-10 code, we can then start getting much more specific. But for now, that's how we're going to go at it.
Jason Gerberry
analystI see. And so where you're at right now? I realize you have this sort of pipeline of patients in terms of how penetrated into LEMS you are now. How should kind of investors think about the durability of that maintaining that sort of level of a pipeline? Imagine you get to like a law of larger numbers and that annualized growth rate start to moderate in future years, but maybe just wanted to get your perspective on that.
Richard John Daly
executiveI think it's quite sustainable for the near to the long term. It's -- I think this is a really robust population. As I said, that lives a fair half the patient population is idiosyncratic and half is tumor lens. Idiosyncratic patients live a normal life span. And the tumor LEMS patients live 17 months. And you can see that there is a significant opportunity on both sides of the equation. And so we believe that the 15% to 20% is sustainable for the mid- to long term.
Jason Gerberry
analystOkay. And then maybe just similarly, as we did with AGAMREE, just thinking about the IP situation here. You have a patent trial. I think there's a claim construction hearing next year and a trial, I believe, would be 2026, although I don't know if the hearing actually has been scheduled. So in terms of milestone events.
Steven Miller
executiveNo. Market hearing has not been scheduled. The defendants continue to file motions with the court that are causing delays, which is interesting because it costs them a lot of money too. I'm not sure they want to do that. But let me just generally say something about litigation. We recognize that any kind of litigation against any company is something that can sometimes cause concern in the investor community. And so we're working diligently to bring these proceeds to a resolution as quickly as possible and in a manner that's as favorable as possible to shareholders. Now having said that, let me tell you about a couple of recent events that I think highlight that we are directionally moving in that direction of [indiscernible]. The first is that one of the Paragraph IV filings, a company called Inventia has actually set and their entry date that they set for is February 2037, which is the expiration date of the last patent for Firdapse. In addition to that, a second company who was a first filer has actually stopped the challenge of the entire family of patents that span from 2032 to 2034. And as a result of that stopping the challenge, the case against them has been discussed. And directionally, I think that what that points to is that gradually that there is some resolution [indiscernible].
Jason Gerberry
analystAnd sorry, so you have 2 that seemingly have gone in a favorable or possible favorable the total of, what, 4 challenges?
Steven Miller
executiveTotal of 4 challenges, that's correct, 3 of which are first filers. The unique legal characteristic of doing a first filer is that as generics, the first filers are entitled to 6 months of exclusivity limit enter the generic market. And then the other generic filers who filed later who enter the generic market.
Jason Gerberry
analystAnd so the one that stopped challenge on the 2032, '34 patents, that was one of how many share first file.
Steven Miller
executiveThere were 3 first filers, and they were one of the first filers.
Jason Gerberry
analystAnd the other entity that settled for 2037 were they a non-first filer?
Steven Miller
executiveThat's correct. They were a later filing.
Jason Gerberry
analystYes. Okay. And so the terminal patent that, I believe, runs to 2037 is the impurity patent if I have that right. And so why do you think that will be difficult for generics to avoid infringement?
Steven Miller
executiveWell, it's an impurity that can show up in some formulations depending on how the product is formulated. If the impurity is found in their formulation, then the way the claims are awarded, they would basically infringe the patent because the patent patents the presence of the specificity.
Jason Gerberry
analystIt was a broad patent difficult to not have the impurity like FIRDAPSE has the impurity in it presumably? And so is something like claim construction typically can kind of affect the broadness, right, of a patent. And so on the one hand, depending upon how the claims get interpreted, does that open up to higher art-based arguments or noninfringement type of strategies?
Steven Miller
executiveWell, the claim construction, those are typically items for a full trial and are not the kind of items that come up during the market here, the time construction. Those typically would be items of what specifically do the claims mean and how broad do those definitions can they be applied to the specific technology that you're getting mitigated.
Jason Gerberry
analystYes, because obviously, the importance of this one, given how big the product is. And if you can stack AGAMREE growth on top of FIRDAPSE that's around for another 10 years is clearly pretty transformational to the company. And so I can appreciate the point about investors wanting clarity around those dynamics. So looking forward to the updates there on the litigation front. So I know we're at time. But maybe do you have a last comment.
Steven Miller
executiveI was just going to say that we certainly would love to talk about the litigation more, but it's generally considered not a good practice to talk about the stuff that's not in the public domain.
Jason Gerberry
analystUnderstood. It's just why I tried to keep it high level. Look, gentlemen, thanks so much for joining us. And hopefully, you have a good rest of your day.
Steven Miller
executiveThank you. Appreciate you inviting us to the conference.
Jason Gerberry
analystAll right. Of course.
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