Tenvir is an antiviral reverse transcriptase inhibitor. It works to treat HIV infection by reducing the amount of HIV in the body by blocking the ability of the virus to multiply. Each film coated tablet of Tenvir contains 300 mg of Tenofovir disoproxil fumarate which is equivalent to 245 mg of Tenofovir disoproxil.Tenvir is an antiviral reverse transcriptase inhibitor. It works to treat HIV infection by reducing the amount of HIV in the body by blocking the ability of the virus to multiply. Each film coated tablet of Tenvir contains 300 mg of Tenofovir disoproxil fumarate which is equivalent to 245 mg of Tenofovir disoproxil.Tenvir is an antiviral reverse transcriptase inhibitor. It works to treat HIV infection by reducing the amount of HIV (the virus that causes AIDS) in the body by blocking the ability of the virus to multiply. Each film coated tablet of Tenvir contains 300 mg of Tenofovir disoproxil fumarate which is equivalent to 245 mg of Tenofovir disoproxil.