Hi doctor, i am a man, 26 year olds. i had a syphilis test (RPR and TPHA compo) after 9 weeks exposure. the test result is negative for both. I know that this test is not conclusive and i must re-test after 3 months exposure. However, i am confused now because after i did the 9 weeks syphilis test i took oral dose of azithromycin which treat for my current chlamydia disease. so whether such antibiotic affect syphilis test and the 3 months-test for syphilis which i intend to test will not be conclusive for me? if not which test is conclusive, how long i must wait for??. thank you very much doctor