Greetings from Singapore, I was possibly exposed to HIV on the 29th of April 2016 with a casual sex worker from vietnam, with the sex involved being unprotected. As such, due to my paranoia from this possible exposure, I went to seek medical attention at the local A&E 22 hours post-exposure. My prescription involved was as followed: (tenofovir, atazanavir: 300mg) (lamivudine:150mg) and (ritonavir: 100mg). Based on the CCC (Clinician Consultation Center), as my prescription involved do not fall under any of the suggested pep regimen, was i possibly given a wrong treatment combination ? If not, how effective is my current regime. P.S. I m finishing my course of medications soon and am soon hitting the 28th day mark. Have already booked a HIV screening follow up with a private clinic. Any insights and thoughts which could shed light on this matter would be greatly appreciated. Lastly, thanks for reading this lengthy post. Best regards, Xj