Tenofovir Efavirenz Emtricitabine Tablets

Q1: What is Trustiva (Tenofovir/Efavirenz/Emtricitabine) used for?

Trustiva is a single-tablet triple combination of Tenofovir DF 300mg + Efavirenz 600mg + Emtricitabine 200mg for once-daily HIV-1 treatment. It is equivalent to the branded Atripla and has been widely used as a complete HIV regimen in a single pill.

Q2: How do all three components work?

Tenofovir and Emtricitabine (dual NRTIs) inhibit HIV reverse transcriptase as chain terminators. Efavirenz (NNRTI) binds to an allosteric site on reverse transcriptase. Together they block two different aspects of HIV's DNA synthesis with triple-class synergy.

Q3: Why must Trustiva be taken at night on an empty stomach?

Efavirenz causes CNS side effects (dizziness, vivid dreams, impaired concentration). Evening/bedtime dosing allows these to occur during sleep, minimizing daytime impact. Fatty meals double Efavirenz absorption and worsen CNS effects.

Q4: What are the most common side effects?

CNS effects (50% of patients early), rash (usually mild, first 2 weeks), nausea, diarrhea, and fatigue. Long-term TDF use can reduce bone mineral density and rarely cause kidney tubular toxicity.

Q5: What CNS effects should patients expect?

Dizziness, vivid or disturbing dreams, difficulty concentrating, and mood changes are common in the first 2–4 weeks. Most improve with time. Significant depression, suicidal ideation, or psychosis require immediate medical evaluation.

Q6: Does Trustiva provide hepatitis B coverage?

Yes. Both TDF and FTC are active against HBV. Trustiva provides dual HIV/HBV suppression in co-infected patients. Never stop Trustiva without ensuring continued HBV coverage.

Q7: What drug interactions affect Trustiva?

Efavirenz is a significant CYP3A4 inducer — it reduces levels of many drugs including hormonal contraceptives, statins, immunosuppressants, and other antiretrovirals. Rifampicin requires Efavirenz dose increase to 800mg. Full interaction review is essential.

Q8: What monitoring is required?

CD4 count and viral load at baseline and every 3–6 months. Renal function (TDF) every 6 months. Liver function tests periodically. Bone density if osteoporosis risk factors. CNS/psychiatric symptom assessment early in therapy.

Q9: Can Trustiva be used during pregnancy?

The individual components are all used in pregnancy. Efavirenz was previously avoided in the first trimester but current evidence supports its use throughout pregnancy. The complete regimen should be managed by HIV and obstetric specialists.

Q10: Is Trustiva still a first-line option?

In developed countries, Dolutegravir-based regimens (e.g., Spegra/Taffic) are now preferred over Efavirenz-based regimens due to better tolerability and higher resistance barrier. Trustiva remains widely used in resource-limited settings where it is cost-effective and well-established.

Q11: How should Trustiva be stored?

Store at room temperature away from light and moisture. Keep in original packaging out of reach of children.

Q12: Do I need a prescription?

Yes. Trustiva requires specialist HIV prescribing with baseline viral load, CD4, and renal function assessment, plus counselling on Efavirenz CNS side effects.