Martine A. Rothblatt
Analyst · Cowen and Company
Yes. I probably -- I'm just going to give you some broad outlines. We just got the FDA clearance on the trial design a couple of weeks ago. But it pretty much is a normal and customary, nowadays, time-to-clinical worsening protocol similar to Macitentan, selexipag, FREEDOM EV. Basically, the new standard for PH clinical trial designs. The unmet medical need that it serves, most probably in my mind, is I am really happy that Tyvaso is growing so rapidly. And as mentioned in my introductory remarks, it's essentially our primary product now, as it's in the shadows of eclipsing Remodulin for the top revenue spot. However, I'm troubled by the fact that the patients' duration on that therapy, while it has increased significantly from when we launched, it's right now on average about 18 months. And that's not as long as I would like. I would like to see patients stay on that therapy quite a bit longer. When we've gone ahead and carefully understood the whys and wherefores associated with this, the one thing which is -- which stands out is that the Tyvaso is unsurpassable in terms of being a pulmonary selective vasodilator and delivering the drug on target right there where it's needed. However, the beauty of Tyvaso compared to, say -- compared to Ventavis is also somewhat of a pharmacodynamic shortcoming in that a patient cannot -- does not have to take Tyvaso more than 4x a day. I don't think, realistically, patients can really comply with an inhalation therapy more than 4x a day. Sadly, I think this is [Audio Gap] for the -- at least from the market research data that we get, that the mean duration on Ventavis is only 6 or 7 months because that drug being less of a pulmonary selective vasodilator than Tyvaso, patients need to take it 6, 8 or more times a day. And nobody in real life can really -- I wouldn't say nobody, but just very few people in real life can comply with that. And as a result, the disease progresses more rapidly than when otherwise would be the case. So the beauty of taking one beraprost pill at the exact same time that you take one Tyvaso inhalation is it keeps compliance in sync. We found compliance with Tyvaso to be superior. And it's getting even better with our next-gen and even our third-gen Tyvaso inhalation devices, making it more and more portable, more and more pocketable. So the compliance with the 4x a day is great. The beauty of adding beraprost to that is then we're able to basically extend the duration of a prostacyclin analogue in the patient's bloodstream for a longer period of time than is the case if you just inhale Tyvaso 4x a day. So you begin to approach the 24-hour 0 order release type of delivery that you can, in general, only get from a parenteral therapy or, as I mentioned in my introductory remarks, our strategic product, which is the TransCon treprostinil. Now, of course, it might be in the patient's best interest to be on a parenteral therapy all the time but the fact of the matter is, that is by definition an invasive therapy. Patients resist going on Flolan or Remodulin until it's clear that they have exhausted all of the other options. So the unmet medical need here, to bring it full circle to your question, is there are 25,000 patients diagnosed. Despite all the best efforts of ourselves, Actelion, Gilead, Pfizer, Teva, these patients are still dying on average in about 5 to 7 years after diagnosis. And that's a pitiful and unfortunate situation. The -- more patients die from pulmonary hypertension having never had the benefit of prostacyclin than patients who die from pulmonary hypertension with prostacyclin. So our hope is that by combining beraprost extended release together with Tyvaso, we will be able to move the number of patients from prostacyclin therapy up from the roughly 8,000 that there are out today, up toward the 25,000 patients who could be benefiting from it and push survival with this condition up into the double-digit years. Next question please.