Efavir® Tablets for HIV-1

Efavir® is a prescription efavirenz tablet used with other HIV medicines. This page explains how the treatment works, who it may suit, and how to use it safely. We support US shipping from Canada, and you can review options even if paying without insurance.

What Efavir Is and How It Works

Efavirenz is a non-nucleoside reverse transcriptase inhibitor. It helps block the HIV-1 enzyme needed to make new virus. The treatment is taken with other antiretrovirals to lower viral load and support immune recovery. For background on the condition, see our HIV resource.

Border Free Health connects U.S. patients with licensed Canadian partner pharmacies; prescriptions are verified with prescribers before dispensing.

An Efavir online purchase requires a valid prescription. You can use this page to compare alternatives, read label-aligned guidance, and plan storage for travel.

Who It’s For

This medicine is indicated as part of combination therapy for adults and certain adolescents with HIV-1. It is not used alone. People with a history of significant liver disease, serious psychiatric conditions, or known hypersensitivity to components should avoid it. Those who are pregnant or planning pregnancy should discuss risks and alternatives with a clinician. For general education on testing, visit Types Of HIV Tests or learn more at How Can You Get HIV.

Some patients consider affordability during therapy selection. If you explore Efavir pay out of pocket approaches, coordinate closely with your prescriber to keep your regimen consistent.

Dosage and Usage

Follow your prescriber’s directions and the official label. Adults often take a once-daily dose, typically at bedtime, to lessen central nervous system effects. Taking the tablet on an empty stomach may reduce side effects; high-fat meals can increase exposure. Swallow whole with water. Keep your other HIV medicines on the same schedule.

Dose adjustments, if any, are determined by your clinician. Pediatric dosing varies by weight and formulation. If you have liver impairment, your care team may monitor you more closely. When uncertain, defer to the official prescribing information.

The standard adult dose is commonly 600 mg once daily; this is general label information and not a substitute for medical advice.

Strengths and Forms

Tablets are commonly available in 200 mg and 600 mg strengths. Packaging and tablet appearance can vary by manufacturer and country. Availability may change over time.

Missed Dose and Timing

If you miss a dose, take it as soon as you remember unless it is close to the next dose. If it is almost time for your next dose, skip the missed tablet. Do not double up. Keep a reminder system to support steady adherence. If vomiting occurs soon after dosing, contact your healthcare professional for guidance from the label.

Storage and Travel Basics

Store tablets at room temperature in a dry place, away from direct light. Keep the medicine in the original container with the label intact. Use child-resistant closures and store out of reach of children and pets. When traveling, carry your medication in hand luggage along with your prescription or pharmacy label. A simple list of your regimen can help at security checkpoints. If your plans involve climate extremes, use a protective case and avoid leaving the bottle in a hot car.

For broader therapy options within the class and beyond, you can browse our Antivirals catalog or filter by origin such as India.

Benefits

This therapy is part of a well-studied class used for combination regimens. Once-daily administration may fit routine schedules. Taking it at bedtime can help some people manage dizziness or vivid dreams. Combined with other antiretrovirals, the treatment can help reduce viral load and support immune health when taken as prescribed.

Side Effects and Safety

• Dizziness or drowsiness
• Trouble sleeping or unusual dreams
• Headache or fatigue
• Nausea or stomach upset
• Rash or itching

Serious risks can include severe rash, liver problems, mood changes, depression, suicidal thoughts, seizures, and heart rhythm issues. Seek urgent care for severe skin reactions, signs of liver injury, or new psychiatric symptoms. Hypersensitivity reactions require discontinuation and medical evaluation. Use caution with alcohol or other sedatives. Discuss plans for pregnancy, contraception, and breastfeeding with your prescriber.

Drug Interactions and Cautions

Efavirenz affects CYP enzymes and has many interactions. Some benzodiazepines, certain antiarrhythmics, ergot derivatives, and pimozide are contraindicated. St. John’s wort can reduce levels and should be avoided. Interactions may occur with rifampin or rifabutin, some antifungals, anticonvulsants, methadone, and warfarin. Hormonal contraceptives may be less effective; consider barrier methods. Certain hepatitis C regimens and boosted protease inhibitors have complex interactions. Share your full medication and supplement list with your clinician and pharmacist.

What to Expect Over Time

With consistent use in a complete regimen, viral load may decline and immune markers may improve. Some central nervous system effects can appear early and often lessen with time. Keep a regular dosing routine, maintain clinic follow-ups, and complete recommended lab monitoring. If you and your clinician decide to change therapy, follow a coordinated plan to prevent resistance. Some choose an Efavir self pay route when navigating coverage gaps; factor clinical needs first.

Compare With Alternatives

Other options in the same class include doravirine and etravirine. Depending on your regimen needs and tolerability, your prescriber may consider Pifeltro or the fixed-dose combination Delstrigo. For a broader view of evolving regimens, see Evolving Landscape.

Pricing and Access

You can view current Efavir price on the product page and compare formats. Many patients evaluate total regimen costs across multiple agents. We offer transparent listings with US delivery from Canada for eligible prescriptions. If you are exploring Efavir Canadian pricing, check the listing details and discuss any questions with our support team.

For helpful offers, visit our Promotions page. Checkout uses encrypted checkout for data protection. Coverage varies by plan; if paying cash, you can compare options and place an order once your prescription is received.

Availability and Substitutions

Supply can vary by manufacturer and lot. If an item is unavailable, your prescriber may recommend a clinically appropriate alternative in the same class or a different class. Some patients prefer Efavir from Canada due to selection and pricing differences. You can also review related agents within Antivirals or explore condition topics like Vaccine To Prevent HIV.

Patient Suitability and Cost-Saving Tips

Good candidates can take a once-daily NNRTI as part of a fully suppressive regimen and can maintain adherence. People with severe psychiatric histories, significant liver disease, or serious skin reactions to similar medicines may need a different option. If contraception is needed, add a reliable barrier method.

• Multi-month fills: ask your prescriber about longer supplies
• Set reminders: phone alarms or pillboxes support adherence
• Coordinate labs: align refills with clinic visits
• Travel-ready: keep a spare small supply in carry-on

If you rely on Efavir cash price, consider consolidating refills across your regimen, reviewing eligible generics, and comparing combination products. For community information and screening reminders, see HIV Testing Day.

Questions to Ask Your Clinician

• Is this NNRTI a good fit for my regimen and history?
• How should I manage early dizziness or sleep changes?
• Which interactions are most important with my current medicines?
• What contraceptive methods should I use while on therapy?
• How often should I have liver tests and other monitoring?
• What signs or symptoms mean I should contact the clinic?

Authoritative Sources

FDA DailyMedFDA Drug DatabaseHealth Canada DPD

Ready to proceed? You can place your order with prompt, express shipping that Ships from Canada to US after we receive and verify your prescription. This information is educational and not a substitute for professional medical advice.