Can you take Tenofovir disoproxil / emtricitabine with Vitamin D3 (Cholecalciferol)?
This is general information, not medical advice. Supplements can interact with medicines and health conditions. Always check with your doctor or pharmacist before starting or changing supplements.
What the evidence says
Tenofovir disoproxil (the TDF in this combination) can gradually lower bone mineral density, likely by affecting how the kidneys handle phosphate and vitamin D metabolism. Supplementing vitamin D3 alongside calcium has been studied specifically as a countermeasure: a randomised controlled trial in people on TDF/emtricitabine/efavirenz found vitamin D and calcium supplementation reduced the bone loss seen with TDF-based therapy, and a systematic review and meta-analysis across both HIV treatment and PrEP populations reached the same conclusion. If you are taking this medication long-term (including for PrEP), talk to your prescriber about adding vitamin D3 (with calcium) to help protect your bone density; this is a supportive pairing, not a risk.
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We check against a limited set of medications. Absence of a warning here is not evidence of safety. Always confirm with your pharmacist.