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Depo-Provera and fluoroquinolones

My girlfriend started using the depo-provera shot about a month ago. We abstained from sex for a week after the injection just to be safe. Two weeks after the injection we had to make a visit to her family practice doctor because we had a hunch that she had a bladder infection. We were right. The doctor prescribed her to take 250 mg of Ciprofloxacin twice daily and of course Phenazopyridine for the pain. Being that we are both young, we had never heard that antibiotics could decrease the effectiveness of birth control. We were never informed of this at the doctor's office when she got prescribed the antibiotics or when she got her injection. I tried to do some research on the internet but I can't find any definitive answers. And the uncertain answers that I have seen just use the very vague term "antibiotics". No one says which certain types of antibiotics interact with the depo-provera shot in an adverse way. In a very round about manner, my question is whether my girlfriend has a higher risk of pregnancy because she is on a fluoroquinolones type antibiotic?    
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Avatar universal
Hi, I am not sure of what type of antibiotic might affect other contraceptives like the pill, but I am pretty sure that she will be fine on the shot. I myself had the depo-provera shot about 10 years ago. I only had one shot and I didn't have a period until a whole year later. It actually took me over another year after my period returned before, I finally became pregnant. The depo-provera shot is extremely effective. So much so, that it actually is a bad choice of contraceptive if you actually want to get pregnant within 2 years of the shot, because it takes that long for your body to return to normal. If you are still unsure, ask her doctor. She should have been made fully aware of the side effects, chances of conception and complications before she was given the shot. Especially since she is young and most likely is very unaware of the negative side effects of the shot, and may not have fully researched it first. The shot is the most easy and effective way to prevent pregnancy but can also take precious years way when you are ready to have a child. Just something to think about.
Avatar universal
I used the depo shot for 10 years before I had my children and never had problems when I took any antibiotics affecting its potency. And as for trouble getting pregnant afterward different types of birth control work differently for different people I was pregnant within 2 months of stopping my shots and easily got pregnant with my second son also after resuming and stopping my depo shots again.  I feel that it is a great birth control and have recommended it to people its very effective and  most  people I know have only had minor side affects such as spotting for a little while.  
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