Does the birth control pill affect Depo-Provera?

Answer 1

Only the antibiotics with an effect on hormon metabolism will have a significant interaction with Depo shot. This means : some HIV drugs, Rifampin (some tuberculosis drugs). But none of the "common" antibiotics (e.g. amoxicillin, penicillin, cipro/moxi/levofloxacin, azithro/clarithromycin, etc..) will affect birth control of Depo shots.

Answer 2

There are a number of medications that can interact with Depo Provera. A partial list includes Provigil, certain HIV medications, certain anti-epilepsy medications, certain barbiturates, griseofulvin, and rifampin. This list is not complete, so check with both the prescriber and the pharmacist before starting any new medication.
There is a very short list of drugs that can affect how well Depo Provera works. Ask your health care provider or pharmacist if you have a question about a specific medication.
Some drugs or herbal products that may decrease the effectiveness of hormonal contraceptives include:

•barbiturates

•bosentan

•carbamazepine

•felbamate

•griseofulvin

•oxcarbazepine

•phenytoin

•rifampin

•St. John's wort

•topiramate

Answer 3

Birth Control pills do not decrease the effectiveness of Depo Provera.