Sanofi - Contingent Value Rig (GCVRZ)

[Enterprising Investor]

Physicians elsewhere may have been awaiting FDA approval?

If EU sales really begin to ramp up, my explanation might be plausible.

It is amazing how long the approval process takes to get even new forms or routes approved.

I have been a migraineur since 1993. My migraines seemed to stop in September 2013, but returned in June 2014. Imitrex (sumatriptan) was developed by GSK. It was introduced in a single-dose injection form on 11/28/92. A 50mg tablet was approved 6/01/95. A single-dose nasal spray was later approved on 8/26/97. Needless to say, it took almost five years from the first FDA approval to get a nasal spray. The drug has been available as a generic for some time now.