Answers by TheMediTary.Com - Last updated: 12-Jul-2023
If you had your shot during the first five days of your period then you have immediate protection from pregnancy.
There are medicine and herbal products that can interfere with the effectiveness of Depo-Provera.
Some of these more common medicines include:
barbiturates
bosentan
carbamazepine
felbamate
griseofulvin
oxcarbazepine
phenytoin
rifampin
St. John's wort
topiramate
Always check with your doctor or pharmacist if you need to take a medicine while on Depo-Provera.
https://www.drugs.com/pro/depo-provera.html