Is Ambien (taken to help sleep) kosher for Pesach? Also, is there a difference between the Ambien made in USA vs. made in Israel?
Many are stringent regarding various ingredients that go into the pill, and this is a popular and well-established custom.
Nonetheless, the Chicago Rabbinical Council policy still holds:
(So let's assume this is discussing chol hamoed.)
I have no idea about any particular medication, but my impression is that some of these issues are of less concern in the US, where most fillers are corn-based, whereas in other parts of the world they may be wheat-based.