On implanon, taking trimethoprim, nauseous, stomach pain, negative pregnancy test. Antibiotics affects birth control?
Patient: I've been on implanon for around 2 years, and I was taking some antibiotic's called sulfameth/trimethoprim last month, and for the past few days I've been feeling nauseous, tired and having pains in my stomach, though they don't lest very long,. but I took a pregnancy test and it had came up negative. and I was just wondering if it would affect the test. and if that antibiotics would affect the birth control.? Doctor: Hi,Trimethoprim can affect contraception to some extent. I suggest getting a pregnancy test. Please repeat a urine pregnancy test if you see your cycles and have missed them or go for the serum beta-hCG estimation which is more sensitive and specific. You should also get a trans-vaginal sonogram to review the pelvic organs. Please also remember that the antibiotic itself can cause some amount of gastric distress. Please see your doctor for further suggestions. Hope you find this information useful. Take care.