Are there any supplements or other medications that I need to avoid when taking prep?
It’s important that, when you start prep, that it is prescribed by your doctor and they can look at all of your medications and check for any interaction that could be present.
If you are starting a new drug that may not be prescribed by a doctor, for example, something over the counter, one website that can be extremely helpful is HIV Drug Interactions: http://hiv-druginteractions.org
This is a great website, and you simply put in the information about the new drug that you’re taking, as well as Truvada or Tenofovir/Emtricitabine, and it will bring up any potential interactions that are with that drug. If you have concerns about interactions, please talk to your HIV prescriber to make sure that everything is looking good.