Sustiva (Efavirenz): HIV Treatment, Dosage, Safety and Price
Sustiva contains efavirenz, a non-nucleoside reverse transcriptase inhibitor used as part of combination antiretroviral therapy for HIV-1 infection. It does not cure HIV and must not be used alone. Effective treatment combines antiretroviral medicines selected by an experienced HIV clinician, along with ongoing laboratory monitoring and adherence support.
Sustiva price can vary by formulation, quantity, pharmacy, insurance coverage, and availability of generic efavirenz. Only buy Sustiva with a valid prescription and a treatment plan from an HIV-care clinician; it is not a substitute for post-exposure prophylaxis or emergency medical advice after a possible exposure.
Indications
Efavirenz is used with other antiretroviral medicines to treat HIV-1 infection. The appropriate regimen depends on prior treatment, resistance testing, liver health, pregnancy status, other medicines, and current HIV guidelines. A clinician will select the companion medicines and monitor viral load, CD4 count, liver function, kidney function when relevant, lipids, and treatment tolerability.
Continue the full regimen exactly as directed. Missing doses or taking efavirenz alone can allow the virus to develop resistance, which may reduce future treatment options. Do not share tablets or capsules, and do not stop therapy because symptoms improve or because dispensing costs change.
Dosage
Take Sustiva exactly as prescribed, usually once daily as one part of a complete HIV regimen. It is commonly taken on an empty stomach at bedtime because dizziness, vivid dreams, and other nervous-system effects may be less disruptive during sleep. Do not alter the timing, formulation, or companion medicines without the HIV clinician’s direction.
You can buy Sustiva 50 mg, buy Sustiva 100 mg, buy Sustiva 200 mg, or buy Sustiva 600 mg only when the prescription specifies the correct capsule or tablet strength. These are product strengths, not a guide to build a regimen independently. A different Sustiva price or package size does not make a product interchangeable with the prescribed formulation.
If a dose is missed, take it as soon as remembered unless the next dose is near; then skip the missed dose and continue the regular schedule. Do not double a dose. Keep the medicine in its original container at room temperature, away from moisture, heat, light, children, and pets.
Safety Information
Efavirenz can cause dizziness, impaired concentration, unusual dreams, insomnia, fatigue, headache, nausea, rash, and mood changes. Serious psychiatric effects, including severe depression, suicidal thoughts, aggression, paranoia, hallucinations, or mania, require prompt medical attention. Avoid driving, operating machinery, or hazardous work until you know how the medicine affects you. Alcohol and recreational drugs can worsen central nervous system effects.
Tell the HIV clinician about liver disease, hepatitis B or C, seizures, psychiatric illness, substance-use disorder, high cholesterol or triglycerides, pregnancy plans, and breastfeeding. Seek urgent care for blistering or peeling rash, mouth sores, facial swelling, trouble breathing, yellowing of the skin or eyes, dark urine, severe abdominal pain, or fever with rash. Do not stop a combination regimen without medical guidance, even if a side effect occurs; contact the HIV-care team promptly for direction.
Efavirenz may cause fetal harm and can reduce the effectiveness of some hormonal contraceptives. Discuss reliable contraception and pregnancy planning with an HIV clinician. Breastfeeding guidance differs by location and individual circumstances, so obtain current specialist advice.
Interactions
Efavirenz has many clinically important interactions. Provide a complete list of prescription medicines, nonprescription products, vitamins, and herbal remedies. Particular concerns include other antiretroviral medicines, rifampin-type antibiotics, antifungals, anticonvulsants, certain antidepressants, sedatives, heart-rhythm medicines, methadone, warfarin, hormonal contraceptives, and St. John’s wort. Some medicines, including pimozide, cisapride, certain benzodiazepines, and ergot-derived medicines, may be unsuitable with efavirenz. The HIV pharmacist or clinician should review every change.
FAQ
Can Sustiva prevent HIV after exposure?
No. Possible HIV exposure requires urgent clinical assessment for an appropriate prevention plan. Do not self-start efavirenz from an existing supply.
Can I buy Sustiva online?
Buy Sustiva only from a licensed pharmacy that requires a valid prescription. Confirm the strength, formulation, quantity, and final Sustiva price with the pharmacy and HIV-care team.
What should I do if I develop a rash?
Contact your HIV clinician promptly. Seek urgent care for a severe, blistering, peeling, or fever-associated rash, or for swelling of the face or breathing difficulty.
Disclaimer
This page is general educational information and does not replace HIV specialist advice, medical diagnosis, official labeling, or pharmacist counseling. Sustiva is a prescription antiretroviral medicine that must be used only as part of a clinician-directed combination regimen. Seek urgent care for severe rash, allergic symptoms, serious mood changes, or signs of liver injury.
