<human>: Is the ocp loette affected by antibiotics? I have been on 2 courses the last month and my period was not normal for me - very light brown discharge. Just need to know if this is normal or if the pill was made ineffective by taking antibiotics and hence I may be pregnant?
<bot>: Hello dairy understand your concerned antibiotics decrease the effectiveness of the birth control pill. It depends on the type of the antibiotics. Following are the antibiotics decrease the effectiveness of the birth control pill:Rifampicine, Amoxicillin, ampicillin, griseofulvin, metronidazole and tetracycline, sulfamethoxazole/trimethoprim, tetracycline, minocycline, and nitrofurantoin. Very light brown discharge could be due to implantation bleeding. So it should be confirmed by the urine pregnancy test. You can also confirm the pregnancy by blood Chat Doctor test. (will give positive result even 10 days after the sex)So birth control pill may decrease the effectiveness of the birth control pill by decrease the concentration of the active hormone in the blood as it increase the metabolism in the liver. Avoid stress, take healthy diet, Chat Doctor. Hope this may help noncontact Chat Doctor for further health query Best regards