Q and A


Can I take Viagra with efavirenz and Truvada?


I currently take Sustiva (efavirenz) and Truvada daily. Can I use Viagra with this medication?

Many thanks


Thank you for your question.

There is a potential interaction between Viagra (sildenafil) and efavirenz (Sustiva). You should speak to your doctor if you want to take Viagra as you may require close monitoring, an alteration of drug dosage or a change in the time you take each drug.

Please read this similar question for further information.


  1. Lisa Thorley

    Hi Bob,

    No there won’t be any interactions between Truvada and Viagra.

  2. bob


    i just want to know if there is any interaction between truvada and viagra?

  3. AD


    I was recently prescribed Levitra by my GP. I’m also on Atripla my GP I did ask him was it safe/ any interactions and he said it was fine. I looked online and it seems that it may result in lower levels of Levitra in the blood (requiring a higher dosage) but no detrimental impacts with Atripla – is that correct? Would I be better asking for Cialis?



Your email address will not be published. Required fields are marked *