<human>: Hi, I had a kidney infection 2 weeks ago and was put on an antibiotics for it and I ve also been on birth control for 7 years. I want to know if it canceled out my bc? I haven t had a period in years and this cycle I did bleed some which was a first..i did have sex w my boyfriend during the antibiotic cycle he pulled out though.. ive been peeing a lot and am worried I could be pregnant....
<bot>: Hello dairy understand your concerned antibiotic decrease the effectiveness of the birth control pill. It increases the metabolism of the pill in the liver and decrease the active hormone in circulation. Following are the antibiotics that decrease the effectiveness of the birth control pill: Amoxicillin, ampicillin metronidazole and tetracycline, ampicillin, sulfamethoxazole/trimethoprim, tetracycline and nitrofurantoin. So if you have used any of the above antibiotic, it decreases the effectiveness and increase the chance of the pregnancy. Ideally you have to used barrier contraception when you are on antibiotic. So I would suggest going for blood Chat Doctor test 10-12 days after the sex to confirm the pregnancy. Increase frequency could be due to pregnancy and UTI. Avoid stress, take healthy diet, Chat Doctor. 