Tenofovir disoproxil fumarate is commonly referred to by its brand name Viread, or its generic name Tenofovir. Tenofovir is used for the treatment of HIV/AIDS, and is in the drug classknown as nucleotide analogue reverse transcriptase inhibitors (nRTIs), which block reverse transcriptase, an enzyme crucial to viral production in HIV-infected people. It works by lowering the amount of HIV in the body, by blocking the ability of the virus to multiply.

Never take any form of medication without consulting with your doctor.

Do not take Tenofovir if you have liver problems or have had a history of liver problems.

Some medicines may react with Tenvir, please ensure your doctor is aware of all medications and herbal preparations you may be taking.

Lactic acidosis (buildup of an acid in the blood), a severe and sometimes fatal side effect, has been reported with this type of medicine. Tell your doctor right away if you experience extreme weakness or tiredness; unusual muscle pain; difficulty breathing; stomach pain with nausea and vomiting; feeling cold, especially in the arms and legs; dizziness or lightheadedness; or fast or irregular heartbeat. Severe and sometimes fatal liver problems have been reported with this type of medicine. Tell your doctor right away if you experience yellowing of the skin or eyes; dark urine; light-colored bowel movements (stools); not feeling like eating for several days; nausea; or stomach pain.

Some patients with hepatitis B virus (HBV) infection who took Tenofovir had severe worsening of HBV infection after they stopped it. Patients who have HBV infection need close medical follow-up to check for worsening liver problems for at least several months after they stop Tenofovir . Keep all doctor and lab appointments. Do not stop taking Tenofovir without checking with your doctor.