Tenofovir Ester, full name Tenofovir Dipivoxil Fumarate Tablets, is effective against human immunodeficiency virus and hepatitis B virus, with side effects such as liver and kidney damage. Tenofovir disoproxil fumarate tablets inhibit the activity of human immunodeficiency virus-1 reverse transcriptase and hepatitis B virus reverse transcriptase, and are indicated for the treatment of HIV and chronic hepatitis B. Side effects include severe acute hepatitis B deterioration, renal damage, bone effects, immunodeficiency syndrome, lactic acidosis, and severe hepatomegaly with steatosis. The drug is contraindicated in allergic individuals and is used with caution in pregnant and lactating women. People with the above mentioned viral infections should be treated reasonably under the guidance of physicians and observe the reaction to the medication, and if any adverse reaction occurs after the use of the medication, it is necessary to stop the medication in time and seek medical attention.