I am on lexiva truvada (emtricitabine and tenofovir) norvir, could cause side effects?

Sometimes. The regimen of norvir, lexiva, and truvada (emtricitabine and tenofovir) is usually well tolerated and does not cause side effects. However, everyone responds differently to medications. Sometimes this regimen may cause some gastrointestinal side effects (such as mild nausea or diarrhea) and cholesterol/triglyceride elevations related to the protease inhibitors.