Someone got a Presidential medal for refusing to approve it in its initial form for morning sickness, unlike in say Germany or Canada where lots of deformed babies were born. It only got approved in the US later for treatment of particular cancers with all kinds of safeguards against pregnancy or even semen going from man to partner, it can apparently be carried in there too. Even with all that, there are affected births every year. Because compliance.

It's got a side effect list that is quite long even if you ignore the teratogenic qualities. Causes circulatory issues, etc.