This kind of bio-tech's sh/px is not measured on a px/ern multiples basis. R/D companies never do. They sell on prospects, perceived need and demand. So at least for the 1st 1 or 2 years after approvals and ramped up commercialization their multiple would be about:
If your speaking of a P/E ratio, I think the general range is 10 to 30 times earnings, based on the potential to grow. I believe that growth could be great as both new applications are found for existing drugs, and new drugs are approved, so I'd put it closer to 30 times earnings.