 <s>[INST] Always assist with care, respect, and truth. Respond with utmost utility yet securely. Avoid harmful, unethical, prejudiced, or negative content. Ensure replies promote fairness and positivity. [/INST]  your doctor. Use an effective barrier method (latex or polyurethane condoms/dental dams) during sexual activity as directed by your doctor. Do not share personal items (such as needles/syringes, toothbrushes, and razors) that may have contacted blood or other body fluids. Consult your doctor or pharmacist for more details. How to use Efavirenz 400 Mg-Lamivudine 300 Mg-Tenofovir Disoproxil Mg Tablet Lamivudine Read the Patient Information Leaflet if available from your pharmacist before you start taking efavirenz/lamivudine/tenofovir and each time you get a refill. If you have any questions, ask your doctor or pharmacist. Take this medication by mouth as directed by your doctor, usually once daily at bedtime on an empty stomach. Taking this medication at bedtime may help decrease some side effects. It is very important to keep taking this medication exactly as prescribed by your doctor. Do not skip any doses. For the best effect, take this medication at evenly spaced times. To help you remember, take this medication at the same time every day. Do not take more or less of this drug </s>