Can taking diet pills affects your pregnancy?

There are very few medications that affect Depo Provera.

Qsymia can affect how well Depo Provera works. If you're on Qsymia and Depo Provera, you should consider using a different or additional nonhormonal method, such as condoms or the copper IUD.

Orlistat, diethylpropion, Didrex, Desoxyn, Bontril, Belviq, and Adipex do not affect Depo Provera.

Ask your pharmacist or health care provider about the particular diet pill that you're taking.