14
Apr
Does Penicillin Affect Birth Control. So far the only antibiotic that studies show interferes with birth control is rifampin Rifadin a drug used to treat tuberculosis. You should use a backup method of contraception until you are 2 weeks in to the next package of pills just to be safe. Its unpredictable how each persons body will exactly react. However critics maintain that many studies that have found a lack of an interaction have been small and therefore unlikely to detect infrequent interactions.
Certain antibiotics like penicillin can compromise the effectiveness of birth control. Whether or not antibiotics such as Keflex cephalexin interact with birth control is a common concern. If you take this medication while using birth control pills it decreases the hormone levels in your birth control pills. You should use a backup method of contraception until you are 2 weeks in to the next package of pills just to be safe. Rifampin doesnt just affect combined oral contraceptives birth control pills that contain both estrogen and progestin. Yaz like all birth control has side effects.
Therefore individuals taking birth control pills should use a second method of birth control when taking these antibiotics or other drugs that can increase the break-down of estrogens.
Penicillin V can make birth control pills less effective which may result in pregnancy. So far the only antibiotic that studies show interferes with birth control is rifampin Rifadin a drug used to treat tuberculosis. This causes the birth control to fail because the hormone levels are reduced and become less effective. Some antibiotics eg rifampin griseofulvin cause the enzymes in the liver to increase the break-down of estrogens and thereby can decrease the levels of estrogens in the body and the effectiveness of the pills. The risks of Yaz are the same they effect a very small amount of users. You should see your doctor Yaz might be related if so stop using it.