The antibiotic you are taking (generic alternative of Bactrim) decreases the effectiveness of Tri Sprintec. You need to be using back up birth control (ie. condoms or spermicide) while you are on antibiotics up until a week after you have stopped taking the antibiotics.

Amoxil does decrease the effectiveness of birth control pills, including Microgynon 50. Make sure that you use back up contraception during the time you are on Amoxil and continue to use back up contraception until a week after you have stopped taking Amoxil.

Thanks

If you are on amoxicillian and birth control pills, then you should use back up contraceptives such as condoms or spermicide during the time you are on amoxicillian and continue to use back up contraception until a week after you have stopped the antibiotic.

If you can tell us which antibiotic you are on that would help us know whether or not it interacts with your birth control and that if you are at high risk of pregnancy.

Spermicide prevents pregnancy by killing sperm with a chemical called nonoxynol-9. Before intercourse, the contraceptive is placed on the entrance of the uterus where sperm are trapped by the foam or gel barrier on the contraceptive which then gets destroyed by the chemical nonoxynol-9. For more information, on the last paragraph of this blog post, we talked about Spermcide: http://www.birthcontrolbuzz.com/blog/2010/10/contraceptive-alternatives-mechanical-barriers.html

I would advise you use back up contraception (ie. condoms or spermicide) during the time you are on Zithromax until a week after you have stropped the antibiotics just in case.

Avelox does decrease the effectiveness of Reclipsen so I would advise you to use back up birth control (ie. condoms or spermicide) while on the antibiotic until a week after you have stopped taking Avelox. Since you have been taking Reclipsen for the past few years, if you have been taking it diligently every day around the same time every day, then chances of you getting pregnant last Sunday is slim. If you are worried, I would advise you to take a pregnancy test in a few weeks.

Cefprozil does not decrease the effectiveness of the Nuvaring. You are safe

There is a chance that you can be pregnant. Whenever you are taking antibiotics and you’re unsure whether it interferes with your birth control pills, use back up birth control (ie. condoms or spermicide) during the time you are taking antibiotics to a week or two after you have stopped taking antibiotics. To find out if you are pregnant, you should wait for your period. If you don’t get your period, take a pregnancy test.

Yes Ortho Tri Cyclen does interact with Nitrofurantoin.

There is a chance you are pregnant. When your doctor prescribes you to an antibiotic, it is VERY IMPORTANT you inform your doctor that you are on Ortho Tri Cyclen. The ciprofloxacin that your doctor prescribes you interacts with your birth control pill. In other words, the antibiotic (ciprofloxacin) that you are currently taking is decreasing the effectiveness of your birth control (ortho tri cyclen). During the time you are on the antiobiotic, you are basically not protected at all. Definitely take a pregnancy test in a few weeks to see if you are pregnant.

I am not sure what Amox TR-K Clv 875-125mg is except it may be an antiobiotic that is 125 mg. I am thinking you are taking either lansoprazole/ amoxicillin/ clarithromycin. In this case any one of lansoprazole/ amoxicillin/ clarithromycin will affect the effectiveness of Nuvaring. When your doctor prescribed you this antibiotic, it is very important you inform your doctor that you are on the NuvaRing, so that he/she will prescribe you to an antibiotic that will not decrease the effectiveness of NuvaRing.

Cefprozil does affect aviane. If you are about to take this antibiotic, make sure you use back up contraception during the time you are on this antibiotic.

If you had unprotected sex during the period you are on an antibiotic that interferes with your birth control, your risk for pregnancy increases. To find out if you are pregnant, you can wait for your next period to come. But since you are taking birth control pills with no break, you can take a pregnancy test in a few weeks.

Keflex and Bactrim DS do interact with your birth control pills. Which pill were you on? If you started the antibiotics on the first day of your period, how long were you prescribed the antibiotics for?

If you were only prescribed for 1 week, then by the end of your cycle, you would have finished the antibiotics and started on your active birth control pills. If this is the case, you should be protected while you had sex the first few days of being back on the pill.

If you were prescribed antibiotics for more than a week, you continued taking antibiotics after your period and started active birth control pills, your risk for pregnancy is high. It may be too early for you to take a pregnancy test right now, you can wait for your period at the end of the month and if it doesn’t come, take the pregnancy then.

Before your doctor prescribes you to any medication, it is very important you remind him/her that you are on birth control pills.

The antibiotic cefuroxime does interfere with Yaz. Taking an antibiotic that interacts with your birth control pill does not normally make you vomit or have diarrhea. It only decreases the effectiveness of your birth control. Hopefully you do get your period on Oct 31, if not, take a pregnancy test. Next time your doctor prescribes you to any medication, make sure you let him/her know you are on yaz. That way he will prescribe you to an antibiotic that will not interact with your birth control pills. If unsure, always you back up contraception for extra protection in case you are not sure if the medication do interact with your birth control pill. Better be safe than sorry.

Thanks for letting us know it is not an antibiotic, I have updated our post. Phenobarbital is a medication that will interfere with birth control pills so definitely watch out!

Yes, it decreases the effectiveness the first day of taking the antibiotic.

If you are taking ciprofloxacin with ortho tri cyclen, it is highly recommended that you use back up contraception (ie. condoms, spermicide, etc) during the time you are on ciprofloxacin because the use of ciprofloxacin will decrease the efficacy of ortho tri cyclen.

No Problem. Glad I could help

No question is a ridiculous question! I do not think it matters when you start antibiotics, as long as you are using back up contraception during the time you are on the antibiotics and at least one week after stopping antibiotics, you should be protected.

It is recommend that you use the back up contraception for at least one week after stopping the antibiotics. Here is some more information about antibiotics – http://www.birthcontrolbuzz.com/blog/2006/07/can-antibiotics-affect-birth-control-pills.html

Ciprofloxacin will affect your birth control efficacy. I would advise you to use back up contraception (such as condoms or spermicide) for the next few weeks. Be sure in the future when your doctor is prescribing you medication to let him/her know you are on birth control pills and to prescribe you with another medication that will not interact with your birth control.

I’m not sure which birth control you are on, but sulfamethoxazole and trimethoprim DOES interact with birth control pills! Make sure that you let your doctor know when he is prescribing you anything that you are on birth control.

When your doctor prescribed you to Zithromax, did you not let him/her know you are also on Nordette? Whenever your doctor is about to prescribe you with anything you have to let him/her know about all the medication you are currently taking, especially your birth control since you do not want a baby because your doctor would have prescribed you something else that would not interact with Nordette.

Right now I would suggest you to use back up contraception if you plan on having sex again. Then, make an appointment with your doctor to get you on to something else that will not interact with Nordette.

As for wondering if you are pregnant or not, I am not sure where you are on your cycle but I would suggest you finish off this pack and wait for your period. If you do get your period, you should be fine. If you don’t get your period, take a home pregnancy test first to see if it’s positive or negative and then make an appointment with your doctor and get a more accurate pregnancy test.

I hope this helps!

As long as you have told your doctor you are on the nuvaring, your doctor would prescribe you a medication that will not interact with your birth control so you can treat your urinary tract infections. Cipro will not affect the nuvaring’s effectiveness.

It may affect the pill, just in case you should use back up contraceptives until you finish the Cephalexin.

Janine