Answer
Using this combination during unrecognised HIV infection may allow resistance to develop, so HIV-negative status must be confirmed and rechecked.
Sources for this answer
- Emtricitabine/Tenofovir disoproxil Lupin 200 mg/245 mg Film-coated Tablets — Current selected SmPCemc · Summary of Product Characteristics
General medicine information. Follow the instructions for your own medicine and speak to a pharmacist or clinician about your individual circumstances.