Covid-19 Service Update

At Pharmacy Rx World, the health and safety of our customers and staff is our highest priority. Due to the worldwide Covid-19 pandemic affecting us all, there have been some changes within our industry in general, and in our company specifically, that we want to make our customers aware of.

Call Center

Our current call center hours of operation are 6AM – 9PM every day, seven days per week. If you are experiencing increased hold times or are calling outside of these hours, please leave us a message or send us an email and we will get back to you as soon as we can. Due to increased demand on telephone networks worldwide, you may experience some intermittent connection problems. If this happens our agents will call you back.


We are currently seeing delays in our regular shipping times. Our normal shipping time averages 1 - 2 weeks. Shipments may now take an additional 2 – 4 weeks or more to arrive, depending on the source country of your order.

Please note that these times are averages and individual shipping times will vary. We highly recommend that you place your order at least 2 – 4 weeks or more ahead of your normal reorder time to avoid running out of your medication.

These are industry-wide delays and are mainly occurring due to disruptions in local postal delivery in the countries where our customers live. They are temporary, and we thank the shipping and delivery personnel who are working hard for all of us during this global crisis.

Please Note: As these types of shipping delays are not within our direct control, we are temporarily adjusting our regular Shipping Guarantee from 30 days to 60 days. We will provide updates as the situation changes.

Our Commitment

If you have any questions about any changes in our service please do not hesitate to contact us. Our staff are working tirelessly to ensure the timely fulfillment and delivery of all orders. The health of our customers and staff is our highest priority and we remain committed to providing service at the highest level.

We thank you for your support in these challenging times.

Management and Staff
Pharmacy Rx World
FREE Shipping on all orders over $49 USD

Sustiva (Efavirenz) and/or alternatives

Brand Name Options
  1. Buy Sustiva

    Sustiva 50mg

    Manufactured by: Bristol Myers Squibb

    Product of United Kingdom. Shipped from United Kingdom

    RxPrescription Required

  2. Buy Sustiva

    Sustiva 200mg

    Manufactured by: Bristol-Myers Squibb Canada

    Product of Canada. Shipped from Canada

    RxPrescription Required

  3. Buy Sustiva

    Sustiva 600mg

    Marketed as Stocrin in Turkey

    Manufactured by: Merck Sharp & Dohme

    Product of Turkey. Shipped from Turkey

    RxPrescription Required

Generic OptionsWhat is a Generic?
  1. Buy Sustiva

    Efavirenz 600mg

    Generic Alternative of Sustiva 600mg

    Marketed as Efavir in India

    Manufactured by: Cipla

    Product of India. Shipped from India

    RxPrescription Required

    * The government of India has closed all international commercial flights effective March 22, 2020. Please note that there will be a minimum 1 - 2 week delay if ordering this product. Please call us to discuss further options.
    Buy Sustiva

    Efavirenz 600mg

    Generic Alternative of Sustiva 600mg

    Manufactured by: A UK MHRA approved Generic Manufacturer

    Product of United Kingdom. Shipped from United Kingdom

    RxPrescription Required

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    Efavirenz 600mg

    Generic Alternative of Sustiva 600mg

    Marketed as Auro-Efavirenz in Canada

    Manufactured by: Auro Pharma Inc.

    Product of Canada. Shipped from Canada

    RxPrescription Required

Please note that the country, manufacturer, and/or shipping country may vary depending on availability. All trademarks and registered trademarks are the property of their respective owners.

General Information on Sustiva

Sustiva is an anti-viral medication that is used as a part of HAART or Highly Active Anti Retro Viral Treatment. It is used in combination with other drugs to specifically treat HIV type 1 infection. Sustiva belongs to the class of drugs known as non-nucleoside reverse transcriptase inhibitors. This drug could also be used for prophylaxis or as a preventive measure for those people who are at constant exposure to HIV infected patients. This medication acts by preventing the virus from rapidly replicating in the body.

Side Effects/ Precautions for Sustiva

Efavirens as it is also known, is commonly known to cause side effects like headache, nausea, vomiting, diarrhea, dizziness, headaches, impaired concentration, neurological symptoms, rash and redistribution of fats in the body. The more serious adverse effects of the drug, however, include severe psychiatric symptoms and clinical depression leading to suicidal thoughts. Therefore patients consuming brand or generic Sustiva must be carefully monitored during the course of treatment. Sustiva is also known to cause convulsions; therefore, adequate precautions need to be taken.

Sustiva drug, in a few cases, has also caused liver failure. Liver function must be constantly monitored in such patients and those with severe liver impairment must be very careful before using this drug. Patients with previous known episodes of conditions like erythema multiforme and Stevens- Johnson syndrome should also refrain from taking brand or generic Sustiva. This medication is not recommended to pregnant women, especially those in their first trimester. It is not clearly known if Efavirens passes through breast milk but patients who are HIV positive are not advised to breast feed.

Sustiva Dosage

Sustiva is given as a dose of 600 mg orally along with antiretroviral medications. It is recommended to be taken preferably at bedtime on an empty stomach. It is to be taken in the capsule form and not broken. If it is taken in combination with voriconazole, then the voriconazole dose should be extended to 400 mg every 12 hours and the Sustiva dose should be limited to 300 mg once a day. For pediatric patients of age 3 years and older whose body weight ranges between 10 to 40 kg, the dosage is according to the body weight. The dosage for children weighing more than 40 kg is 600 mg once a day.

Why Buy Sustiva From online prescription service RX World?

You will need a valid prescription to buy Sustiva from us. We stock Sustiva 50mg, 200mg and 600mg. Since this is an anti- HIV medication, we realize that confidentiality is of utmost importance. As with every other purchase through our mail order online prescription service, complete privacy is promised.

IMPORTANT DISCLAIMER: All medical content is supplied by a third party company who is independent from this web site. As such, this web site can not guarantee the reliability, accuracy, and /or medical efficacy of the information provided. In all circumstances, you should seek the advice of a health professional pertaining to drug, treatment and/or medical condition advice. Note that not all products are shipped by our contracted Canadian pharmacy. This website contracts with dispensaries around the world that ship products directly to our customers. Some of the jurisdiction include but are not limited to United Kingdom, Europe, Turkey, India, Canada, Vanuatu, Mauritius, and USA. The items within your order may be shipped from any one of these jurisdiction depending on the availability and cost of the products at the time you place your order. The products are sourced from these countries as well as others. Please note that the product appearance may vary from actual product received depending on availability.