Tenofovir hydrate is primarily used in the treatment of HIV and chronic hepatitis B infections. It works by inhibiting the reverse transcriptase enzyme, which is essential for the replication of the virus. This helps in reducing the viral load in the body and improving the immune system's function. It is often prescribed as part of a combination therapy to enhance its effectiveness and reduce the risk of developing drug resistance. Additionally, it is used in pre-exposure prophylaxis (PrEP) to prevent HIV infection in individuals at high risk. The medication is available in various forms, including tablets and oral powder, making it accessible for different patient needs. Regular monitoring and adherence to the prescribed regimen are crucial for achieving the best therapeutic outcomes.