Greeting and welcome to the Catalyst Pharmaceuticals CPRX First Quarter 2022 Financial Results Conference Call. At this time, all participants are in a listen-only mode. A brief question-and-answer session will follow the formal presentation. As a reminder, this conference is being recorded. It is now my pleasure to introduce your host Ali Grande, CFO of Catalyst Pharmaceuticals. Please go ahead.

Good morning, everyone, and thank you for joining our conference call to discuss Catalyst's first quarter 2022 financial results and corporate highlights. Leading the call today is Patrick McEnany, Chairman and Chief Executive Officer. We are also joined by Dr. Steve Miller, our Chief Operating Officer and Chief Scientific Officer; and Jeffrey Del Carmen, our Chief Commercial Officer. Further for the Q&A session, we'll have Dr. Gary Ingenito, our Chief Medical and Regulatory Officer and Brian Elsbernd, our Chief Legal and Compliance Officer. Before we begin, I would like to remind you that in our presentation this morning and in the Q&A session, we will make statements about expected future results, which may be forward-looking statements for purposes of the Federal Securities Laws. These statements relate to our current expectations, estimates, and projections, and are not guarantees of future performance. They involve risks, uncertainties, and assumptions that are difficult to predict and may prove not to be accurate, especially in light of the effects of COVID-19. Actual results may vary from the expectations contained in our forward-looking statements. These forward-looking statements should be considered only in conjunction with the detailed information contained in our SEC filings, including the risk factors described in our 2021 annual report on Form 10-K. At this time, I’ll turn the call over to Pat.

Thanks, Ali. Good morning, everyone, and thank you for joining us today for Catalyst's first quarter 2022 financial results and update call. As you can see, we had a remarkable first quarter. As we delivered record net product revenue of $43 million, a 42.5% increase compared to Q1 of 2021 and ended the quarter with $198 million in cash and short-term investments. Net income before income taxes for Q1 of 2022 was $17.5 million, a 76.7% increase compared to $9.9 million for Q1 of 2021. We reported GAAP net income of $13.2 million for Q1 of 2022 or $0.13 per basic share and $0.12 per diluted share. During Q1 of this year, we repurchased 400,000 shares of our common stock from the open market at an average price of $6.38. Since we started the program in March of last year, we have repurchased a total of 2.6 million shares at an average price of $5.61. We continue to make purchases at times when we feel it is prudent and beneficial to our shareholders. As a result of the outstanding performance for the quarter, we are reiterating our full-year 2022 total revenue guidance of $195 million to $205 million, representing a 38% to 45% increase in total revenues compared to 2021. We also anticipate our cash operating expenses, that is, research and development and SG&A expenses to be between $65 million and $70 million for the full-year. I'd like to begin today's discussion with a brief overview of our commercial performance and execution for the quarter. Our robust growth was attributed in part to the positive outcome from the 11th Circuit Decision, reaffirming our orphan drug exclusivity for Firdapse for the treatment of Lambert-Eaton myasthenic syndrome or LEMS. The removal of Ruzurgi from the market in February of this year, following our favorable court ruling was a defining inflection point for additional new patient enrollment growth. As those patients previously prescribed Ruzurgi sought to transition to Firdapse. We anticipate the number of those patients to be about 125, almost all of which are adult LEMS patients. As of the end of April, most of those patients have transitioned to Firdapse from their prior treatment. We anticipate the conversion of the remaining patients should be completed by the end of this quarter. We believe the success rate is attributed to the exceptional competencies of our patient assistance teams and programs that were ready and prepared to help ensure these patients their seamless transition. We also continue to achieve high organic new patient growth for Firdapse, attributed to the successful execution of our commercial plan. We benefited from several key initiatives that have been underway, including enhanced awareness and education to patients, caregivers, healthcare professionals; and expanded focus on paraneoplastic patients, LEMS patients, and thoracic oncologists who treat those paraneoplastic patients. We also increased access to a diagnostic test to help accelerate the process for definitive diagnosis. We're extremely pleased with the performance of our commercial organization. As we enter the second quarter with continued momentum, we expect to sustain the organic growth rate driven by newly diagnosed patients and the considerable number of patients diagnosed with LEMS who are not yet on Firdapse. We estimate that there are approximately 3,000 LEMS patients in the U.S., of which based on insurance claims data half are without a diagnosis or are misdiagnosed. Although approximately 1,500 patients that have received a definitive diagnosis for LEMS, we have only reached slightly over 800 patients, leaving much work to be done to assist the remaining patients to a definitive diagnosis and to find their way to an FDA-approved therapy to treat their LEMS condition. We have also fortified our intellectual property estate with the issuance of three new patents, which are now listed in the Orange Book. These patents are directed to the treatment of patients suffering from LEMS and covering all amifampridine metabolizer types within the LEMS patient population. We believe that these new patents will enhance the commercial durability of Firdapse, which has U.S. patent protection until 2034. During the quarter, we made considerable progress in our effort to build a more diversified portfolio that aligns with our growth strategy and revised acquisition criteria. Our key priority on the strategy and business development front remains to broaden and diversify our product portfolio through collaborative partnerships, acquisition of commercial stage assets or companies with FDA-approved rare disease therapies. To accomplish these objectives, our Chief Strategy Officer, Dr. Preethi Sundaram, his task was spearheading a stringent and disciplined approach to evaluating assets for portfolio expansion. At this time, we are actively engaged in evaluating several potential opportunities to acquire products and/or companies with drug products in commercial stage. However, no agreements have been entered into to date. On April 8th, 2022, Jacobus Pharmaceutical filed a petition of writ of cert with the U.S. Supreme Court to appeal Catalyst’s favorable decision from the 11th Circuit Court of Appeals. Now that the petition is filed, they are waiting for a decision as to whether the High Court will grant the request for a cert. With only about 1% of all such petitions typically granted by the court for review, we have been prepared for the prospect of this filing. This appeal process could take several months during which time Ruzurgi's status remains not approved in the U.S. We've submitted a supplementary NDA for pediatric label expansion to the FDA, as part of our commitment to provide the very few pediatric LEMS patients with access to an approved therapy. In the meantime, we continue to make Firdapse available to any pediatric LEMS patients through our Expanded Access Program at no cost. In March of 2022, we also received a favorable Canadian Federal Court ruling, enforcing Firdapse's Innovative Drug data protection. This resulted in the setting aside of the approval of Ruzurgi, and it has been removed from the market in Canada. The matter has been remanded to the Minister of Health for redetermination. Our other litigation is the patent infringement case against Jacobus and PantherRx, the specialty pharmacy for Ruzurgi. This suit is in the early stages of discovery. We'll continue to keep you advised as this case progresses. On Global Rare Disease Day, at the end of February, we were proud to partner with several national patient organizations to increase awareness about rare diseases, focusing on important health messages about LEMS diagnosis, treatment, and quality of life issues. The goal included raising awareness of rare diseases and helping amplify the voices of those patients in need of innovative new therapies. I will now turn the call over to Jeff Del Carmen, our Chief Commercial Officer, who will provide you further highlights on our commercial execution.

Thanks, Pat, and good morning, everyone. The commercial team delivered a very strong quarter, building upon the momentum from 2021. Q1 Firdapse net sales were $43 million, which represents 13% growth quarter-over-quarter and 42% growth year-over-year. I'm proud of the flawless execution demonstrated by the entire commercial organization. Commercially, we had two primary objectives in Q1. First and foremost to transition the majority of Ruzurgi patients to Firdapse with therapy. Second, to demonstrate significant organic growth through new patient enrollments. By the end of March, over 90% of adult LEMS patients we estimated to have been on Ruzurgi have been successfully transitioned to Firdapse, with the remaining balance expected to transition by the end of the second quarter. The full impact of the transition of the former Ruzurgi patients will be realized in the second quarter. Payer approval rates were greater than 95% for adult LEMS patients transitioning from Ruzurgi. I am particularly proud of the Catalyst patient services team, which is doing a tremendous job supporting the needs of adult LEMS patients, caregivers, and healthcare professionals during this process. As for organic growth, naive new reimburse patients were 18% greater compared to Q1 2021 and 5% greater compared to Q4 2021. In fact, March 2022 naive new enrollments matched the highest monthly total since launch. Additionally, operational excellence maintained favorable access of greater than 90% across all payers, government, or private commercial insurers, continued high compliance of greater than 90%, and contributed to a discontinuation rate of approximately 5%. We expect considerable organic growth each quarter in 2022, primarily driven by new patient enrollments of already diagnosed LEMS patients not yet on Firdapse and the significant number of patients that are unfortunately misdiagnosed or undiagnosed. In April, naive new patient enrollments remained strong, and discontinuation rates were steady and in line with forecast. Our marketing strategies continue to generate significant returns on investment. Approximately 15% of the active adult LEMS patients on Firdapse have opted into our patient marketing campaign, which offers resources such as a LEMS symptoms tracker, LEMS physician locator, and LEMS patient journey. Additionally, educational content to small cell lung cancer treaters continues to show strong engagement, which will yield more patients with a proper diagnosis of LEMS and accelerate the opportunity to receive treatment for this disease. In addition to ringing the opening bell at NASDAQ to celebrate Rare Disease Day, Catalyst launched the LEMS podcast on the award-winning disease-specific educational website lemsaware.com to increase awareness and connections in the Lambert-Eaton myasthenic syndrome community. Furthermore, we partnered with key professional societies like the American Academy of Neurology and Muscular Dystrophy of America to educate the members about LEMS and Firdapse at their respective conferences. Our Catalyst Pathways patient services did a tremendous job in Q1, not only supporting patients transitioning from Ruzurgi but also providing financial and educational resources to new and existing adult LEMS patients, caregivers, and healthcare professionals. In closing, we are pleased with our performance in Q1 and are excited about the significant opportunity ahead to help all adult LEMS patients. We are confident that the strategies and tactics we have put in place will deliver sustained organic growth in 2022 and beyond. I want to thank the entire team at Catalyst for their unwavering commitment to the LEMS community. I will now turn the call over to Dr. Steven Miller, our Chief Operating Officer and Chief Scientific Officer for an update on R&D activities.

Thanks for the commercial update, Jeff. I'll now provide an update on our operational initiatives. Our objectives for 2022 are straightforward, which are to continue to increase the number of adult LEMS patients being treated with Firdapse, expand the commercial potential of Firdapse, and identify synergistic opportunities in the rare disease space. Our medical affairs team continues to make significant progress in engaging with healthcare providers to provide valuable direct education and content. We also promote and support accredited CME programs designed to increase awareness of LEMS within the prescriber community. The largest of these CME programs educate physicians through an online program on how to recognize, formally diagnose, and treat LEMS, and it is currently available to all U.S. physicians through Medscape. To date, over 6,000 healthcare providers have viewed the Medscape course, and as of April 21st of this year, 1,772 licensed healthcare providers have obtained CME credit. In addition to this Medscape program, on May 4th, Catalyst supported a LEMS session at a live tumor board of oncologists that was hosted by physician education resources. This recorded session is the basis for another program that we provided to physicians free of charge for one year as an enduring CME course intended primarily for oncologists and promoted to all oncologists in the physician education resources network and in several neurology and oncology publications. We recently announced the issuance of three new patents covering additional patient, amifampridine metabolizer types issued by the Patent and Trademark Office, bringing the total number of issued patents protecting the Firdapse franchise to five. All three patents are listed in the FDA's Orange Book, bringing the total number of patents now listed to five. This important milestone now provides broad comprehensive protection for the Firdapse franchise regardless of the NAT2 metabolizer type. We will continue to execute on our key initiatives to strengthen and protect the long-term durability of Firdapse, which currently has patent exclusivity protection in the U.S. until mid-2034. Our sub-licensee partner, DyDo Pharma continues to progress on its Phase 3 clinical study for Firdapse to treat Lambert-Eaton myasthenic syndrome in Japan. In December 2021, they initiated the small scale Phase 3 study and the enrollment of patients is progressing as planned. We expect the enrollment period to be completed by the end of this year or early 2023. Catalyst supports DyDo's study program by supplying clinical trial materials and collaborating in their efforts and is also providing all needed technical information to file an NDA in Japan. In alignment with our commitment to provide an approved treatment for all LEMS patients, we filed a supplementary NDA submission package for pediatric LEMS label expansion for Firdapse. This submission, if approved, would expand the use of Firdapse to all LEMS patients over the age of six. As a reminder, the pediatric LEMS patient population is very small, with a total population in the U.S. estimated at less than 30 patients. The vast majority of patients that suffer from LEMS are adult patients for which Firdapse is already approved. If we secure the label indication, it will help simplify and improve access to the product for pediatric LEMS patients. While this is an important initiative, our development priorities are fully aligned on advancing our objectives to expand our portfolio of rare disease treatments beyond Firdapse. Our Firdapse development program initiatives are focused on those discussed today, and to maximize most of our internal resources on strategic expansion initiatives, and we are making substantial progress. Our teams are very focused on evaluating several products and opportunities. We remain highly confident in identifying the right opportunities to maximize our capabilities and resources. The clinical and operational insights we have gained within our core market provide us with the expertise to drive progress in our current initiatives and pursue additional prospects. We have good momentum behind our business development activities and are making meaningful progress on our strategic partnership initiatives. We are very well positioned to meet our objectives to foster future growth opportunities for the near and long-term and are excited about the path ahead. I will now turn the call over to Ali Grande, our Chief Financial Officer to review our financial results.

Thanks, Steve. It goes without saying that we are very pleased with our financial results for the first quarter of 2022. Our total net revenue for Q1 2022, principally from Firdapse product revenue, was $43.1 million, a 42.7% increase when compared to total revenues of $30.2 million for Q1 2021. Net income before income taxes for Q1 2022 was $17.5 million, a 76.7% increase over net income before income taxes for Q1 2021 of $9.9 million. We reported GAAP first quarter 2022 net income of $13.2 million or $0.13 per basic share and $0.12 per diluted share, an increase of 72.8% year-over-year compared to the first quarter 2021 GAAP net income of $7.7 million or $0.07 per basic and diluted share. As a reminder, in the first quarter of the calendar year, like many companies in our industry, we were impacted by the reset of the patient deductibles. Furthermore, in the first quarter of 2022, we recorded an increase of $2.1 million in expense related to our commitment to make charitable donations to 501(c)(3) foundations that support LEMS patient programs. While GAAP requires such contributions to be expensed in the first quarter of 2022, when we committed to make these contributions, they will support LEMS patient programs for the full 2023 year. Our effective tax rate for Q1 2022 on an annualized basis was 24.2%, compared to 22.5% for Q1 2021. For 2022, we expect that we will continue to benefit from the use of our deferred tax assets primarily relating to Florida State net operating losses and the orphan drug credit, although those are subject to certain limitations resulting in a more normalized tax rate. Non-GAAP net income for the first quarter of 2022 was $19.4 million or $0.19 per basic share and $0.18 per diluted share, which excludes from GAAP net income stock-based compensation of $1.9 million, depreciation of $34,000, and an income tax provision of $4.2 million. This compares to non-GAAP net income for the first quarter of 2021 of $11.6 million or $0.11 per basic and diluted share, which excludes from GAAP net income stock-based compensation of $1.6 million, depreciation of $97,000, and an income tax provision of $2.2 million. The above represents an approximately 67.9% increase in non-GAAP income year-over-year. Cost of sales expenses were approximately $5.9 million in Q1 2022, compared to $4.7 million in Q1 2021; this represents 22.9% of total operating costs in both periods. For Q1 2022, cost of sales were 14% of product revenue net and consistent principally to royalties. As a reminder, royalties increased by 3% when net product sales exceed $100 million in any calendar year, so we expect cost of sales to trend higher as the year progresses. Research and development expenses were $3.4 million in Q1 2022, compared to $3 million in Q1 2021. R&D expenses decreased slightly as a percentage of total operating expenses to 13% from 15% in Q1 2021. SG&A expenses for Q1 2022 totaled $16.4 million, compared to $12.7 million in Q1 2021. SG&A expenses increased slightly as a percentage of total operating expenses, representing 64% for Q1 2022 compared to 62% for Q1 2021. The overall increase in SG&A expenses in Q1 2022 was largely caused by contributions during the first quarter of 2022 to 501(c)(3) organizations whose contributions will be used over the full year 2022, as previously noted. As reported, we ended the quarter with cash and investments of $198 million and no funded debt. We believe this allows us the financial flexibility to fund our existing R&D programs, as well as support our strategic initiatives requiring opportunities leading to future growth and value creation. More detailed information and analysis of our Q1 2022 financial performance may be found in our quarterly report on Form 10-Q, which was filed with the Securities and Exchange Commission yesterday, May 10th and can be found on the Investor Relations page of our website. And with that, I'll turn the call over to Pat.

Thanks, Ali. In closing our prepared remarks, I'd like to add that Catalyst is well positioned to deliver sustained performance with an unwavering commitment to the LEMS community and execution of our strategic priorities. We anticipate this to be a transformative year for the company with increased momentum to diversify and invest in innovative opportunities for rare diseases. We approach these objectives from a position of strength and look forward to enhancing our growth potential and long-term value for all of our stakeholders. Finally, I'd like to thank all of our valued employees for their continued dedication and commitment to positively impacting patients' lives. Operator, we'd now like to open the call for questions.

Thank you very much, sir. Ladies and gentlemen, we will now be conducting a question-and-answer session. The first question comes from Joe Catanzaro of Piper Sandler.

Hey, everybody. Thanks so much for taking my questions here. Maybe the first one from me, with 90% of the former Ruzurgi patients having transitioned to Firdapse. I'm wondering if you could say whether your 125 patient estimate is proven accurate or if it’s still a little bit of a moving target? And I think you mentioned something about payer decisions for these patients, but what percent of patients were transitioned to free drug? And when would you expect those patients to become paid reimbursed scripts? Thanks, and I have a follow-up.

Good morning, Joe. Thanks for the question. I'll turn that over to Jeff Del Carmen.

Sure. So Joe, to answer your question about the patients being approved, greater than 95% of the patients that transitioned from Ruzurgi, the adult LEMS patients were approved by the payer. They only were on bridge for a short time, and we expect the full impact of these patients to truly be felt in Q2.

I'll add to that, Jeff, that we're pretty comfortable Joe with that number of 125. We think that's pretty accurate within 5% either way. So we will stand by that for the moment.

Okay, great. And I think, if I heard correctly, you mentioned that March was the highest month for naive new patient enrollment since the launch. Just can you speak to whether you've continued to observe those favorable trends into April? And is the organic growth you’re expecting this year driven entirely by improving diagnosis rates or are there other levers that you're looking to pull?

Yes, Joe. And we did continue to see strong enrollment numbers. Right, April almost matched March, so very strong numbers and a lot of things contributing to that. But another thing is, the country is opening up again, and patients are able to dose with these physicians. We have a strong pipeline of patients that we suspect are LEMS diagnosis, and so the vast majority of them are over 500 of these patients that are leads, and a lot of times these patients are just waiting to see their physicians. So we suspect strong continued organic growth, but it's going to come from these new enrollments, where our great organic growth is in 2022.

Okay, great. And maybe one just last one, an obligatory one on business development. I'm wondering where you are in the process and some of those diligence that you're doing? I think Pat, you mentioned you're active on a couple of potential deals, but maybe you could just give a little bit more commentary on that? Thanks.

Sure. Yes, our criteria has changed a little bit, Joe, in that we believe that we're more interested today in commercial opportunities, perhaps drugs that have been approved by the FDA that haven't been launched yet or are very early in their launch. We think that we can add great value to those opportunities with our commercial team and our experience in launching rare disease drugs. It's hard to be specific; we are fairly deep into due diligence on several opportunities. I think that’s probably as far as I can go in describing where we are in the process.

Okay, got it. That's helpful. Thanks for taking my questions.

Thank you. Thanks, Joe.

The next question comes from Charles Duncan of Cantor Fitzgerald.

Yes, good morning, Pat and team. Congratulations on a good quarter commercially. I had a few questions on that side of the business, but then also a couple of others. Just kind of to continue and to some of the past questions, I guess when you think about Q2 and some of the trends that you see going into it, what do you think is going to be the primary contributor in terms of revenue? Would it be the impact of the Ruzurgi switches or would it be organic growth in Q2, if you had to project?

Thanks, Charles, for the question. I'll let Jeff take that question.

Sure. So Charles, two-fold really, and you mentioned them. We do expect the full impact of the Ruzurgi transition, those patients that transitioned from Ruzurgi, I should say, to be felt in Q2, so that's going to be a huge contributor to the increase. But also the organic growth that we're seeing from new patient enrollments is very strong as well. So those new enrollments that we saw in March, the revenue that the impact of those patients will be felt until the second quarter as well. We're also seeing a strong April, and we're seeing a strong start to May too. So I think it's going to be two-fold; both those things will be contributing strongly to the revenue in Q2.

And then when you consider the prescribers, so going beyond the patients, when you consider past prescribers of Ruzurgi, are you getting feedback from them that would contribute to, I think you mentioned about 500 possible patients that you've identified? Are you getting feedback from prescribers that would suggest that that pool of patients is expanding as a result of, in part, the Ruzurgi switches?

Yes, I do think that that's an accurate statement. In essence, you're eliminating a distraction or another product that they can prescribe for LEMS. So these physicians, we do see some potential there from these physicians. Those 500 patients are from either Cynthia leads like this lead that we're seeing from claims data or field force that's out there with – so it's field intelligence where they are. But we do think that we will have some tailwinds because of these prescribers now focusing on Firdapse for LEMS only.

Last question on the switches. I imagine it's a little too early to really clean many takeaways. But in your discussions with patients who have done this switch, have you gotten any compare and contrast relative to the services that were provided by Jacobus and Ruzurgi in the past relative to your service and not only the drug – the responsiveness to the drug, but also the broader services of providing access to support?

Yes, I'll focus on the services we provide. Charles, I believe we have an exceptional team. Our field force, including regional account managers, salesforce, and patient services team, has unique experience in rare diseases. We dedicate significant resources to ensure that LEMS patients receive proper care and access to essential resources that they lacked with other medications. Now that they are part of Catalyst Pathways, they can access these services. It's important to note that not all of this is product-related. I encourage everyone to visit lemsaware.com to explore the resources available. We strive to support the LEMS community, and the feedback from patients who transitioned to us reflects that experience. I take pride in the achievements of our team.

Last question for Pat or Steve, perhaps regarding the Biz Dev activities. You kind of alluded to this in the previous questioner's question. But Steve, you mentioned substantial progress to expand the portfolio and Pat mentioned engaging in several diligence projects. I’m wondering if you could provide some additional color on the progress? Or would you anticipate being able to consummate some type of portfolio expansion effort by the end of this year?

Yes, Charles. We prefer not to discuss specific opportunities, but as I mentioned earlier, we are currently deep into the due diligence process on a couple of promising projects. I think that's about all the detail I can share at this time. However, we have shifted our focus from later stage development opportunities to approved commercial opportunities.

Is the current market environment helped in terms of valuations?

Yes. I think so. It's been a difficult 12 months in biotech. You just look at the indexes that are down 50% or more from a year ago and the window for financing looks like it’s not wide open as it was a year ago. So I think the backdrop is certainly making it more interesting and frankly to the point where we’ve had a few companies actually approach us, which is kind of interesting. I think it speaks to the environment; a company that may have to go and do another financing and looking at their stock trading at a 52-week low and knowing that they're probably going to have to discount 15% to 20%. A number of those emerging biotech companies are looking at what their strategic options might be other than going to the market for a follow-on offering. So I would say that the environment is certainly better today than it was a year ago for a buyer.

Also likely speaks to your operational progress and performance. So thanks for taking all my questions.

Thank you, Charles.

The next question comes from Joon Lee of Truist Securities.

Good morning, Joon.

Good morning. This is Les on for Joon. Thank you for taking my questions. First, I believe in your prepared remarks you identified about 30 pediatric LEMS patients. How many of those are currently on Firdapse? And then secondarily, what will the approval of the supplementary package essentially grant you? And I have a follow-up.

Yes, the number of pediatric patients we believe is actually less than 20. We have a number of those pediatric patients that we currently provide the drug to on an expanded access basis at no cost. So we have, as I mentioned in our prepared remarks, filed a supplement with the FDA. We're hoping to get the label expansion approved, whereby pediatric patients, of that very small number of patients, will all have access to an FDA-approved therapy without being prescribed off-label or through an expanded access program.

Got it, thank you for that clarity. And then second, in the past you've mentioned around 22% of new enrollments have been from tumor LEMS patients. Can you provide the latest figure if possible and/or perhaps how that number has trended? And then also what resources have you applied to target the tumor LEMS patient population? Thank you.

Sure. Les, I’ll let Jeff answer that?

Sure. We are still tracking around the low '20s in terms of the percentage of new patient enrollments that are tumor LEMS patients. We expect that the educational efforts we are implementing this year and next will help increase that percentage. Currently, we are providing significant educational content focused on oncologists, particularly thoracic oncologists or those treating small cell lung cancer patients. These educational resources are available through various platforms to help connect with the physicians who treat these patients. We are very confident in our strategy and the resources we are deploying, which will assist in identifying these patients, accurately diagnosing them with LEMS, and effectively treating them with Firdapse. We anticipate growth in this area later this year and into next year.

Les, I'd also like to reiterate something that was said in my prepared statements about our new CME program that is made available through physician education resources to oncologists.

Very helpful, thank you for that.

Les, is there another question?

Yes. The next question is from Scott Henry from ROTH Capital.

Thank you. Good morning and really strong results. Nice job there.

Good morning, Scott.

Couple of questions. First, here we talked about a lot about the organic growth. Where would you perhaps you want to put a range on that? But what rate do you think organic growth in terms of volume approximates right now?

Scott, from the day that we launched in early 2019, year-to-year we've seen about a 15% to 20% growth rate organically. That's through the last couple of years being under pandemic conditions. So I think that we've done a great job in growing organically, and as physician practices continue to open and diagnose patients to get them a definitive diagnosis. We think that the high end of that range could be our growth factor going forward. So Jeff, anything to add to that?

Fully confident in the 15% to 20% you mentioned, Pat. And like you said, I think the biggest impact is the backlog and patient visits that we're waiting to alleviate here. We expect to see that in this year and beyond, which will help these patients that are currently diagnosed but not yet on therapy become effectively treated by these physicians with Firdapse.

Okay, great. Thanks for that color. And then shifting over to the income statement, I think you said $65 million to $70 million of operating expenses. I'm assuming that is excluding stock comp. If that is in fact the case, would you expect Q1 to sort of be representative of the rest of the year? I know there were some front-end loaded expenses, but if that range excludes stock comp that's probably what would get you there? Just want to see if they should expect any trends within the year or if Q1's representative.

Yes, Scott. Non-cash comp is something of course we have every quarter. We have expenses or charges and those again are not cash. So those are excluded from our cash OpEx, and that OpEx is defined as research and development and SG&A. We do have some seasonal, what I'll call seasonal expenses in Q1 that most of our peers have, as patients are getting reauthorized and having to meet new deductibles. Our gross-to-net is obviously affected in Q1. Also, we have a sizable expense for charitable contributions to 501(c)(3) organizations, and the contributions will be used over the full-year 2022 as previously noted. Unfortunately, general accounting practices require us to take that full charge in Q1 rather than amortize it over four quarters, like you would expect. Thus, the full contribution for the year is charged in Q1. So that to a certain degree really skews certainly G&A expenses for Q1.

Okay. That's really helpful. Thank you, Pat. And then I assume R&D should probably stay at these low levels until you acquire something, is that fair?

Yes. That's a good assumption.

Okay. And then final question I guess for Ali, with regards to the royalty structure, I recall reading in the K about 7% to BioMarin and other perhaps 7% sub royalties. You mentioned that it goes up after $100 million per year, could you just remind me of what the terms of that were?

So the royalties will go up once we hit $100 million in sales, as defined by the contract. That's why we expect royalties to increase as we progress in the year.

Okay, perfect. All right, thank you for that clarification and thank you for taking the questions.

Thank you, Scott. Just one thing to add that you should be aware of, and I think we've talked about it previously. Now that most of our NOL has been used up, I think that a going forward tax rate of about close to 25% between federal and state and local taxes that we have to pay would be good for modeling purposes.

Thank you very much, sir. Ladies and gentlemen, we have reached the end of the question-and-answer session. I'd like to hand the floor back to Mr. Patrick McEnany for closing remarks.

Thanks, everyone for joining our call. We look forward to our next corporate update. Have a great day. Thank you.

Thank you. This concludes today's teleconference. You may now disconnect your lines. Thank you for your participation.