Didanosine therapy is primarily used for which condition?

Didanosine, also known as ddI, is an antiretroviral medication that inhibits the replication of the human immunodeficiency virus (HIV). It is part of the nucleoside reverse transcriptase inhibitor (NRTI) class of drugs, and its primary indication is for the treatment of HIV infection. The mechanism involves interfering with the viral reverse transcriptase enzyme, which is essential for converting viral RNA into DNA, thereby preventing the virus from multiplying and further damaging the immune system.

While there are treatments available for conditions like Hepatitis C, tuberculosis, and heart failure, didanosine is not indicated for those diseases. This specificity makes it clear that its use is focused primarily on managing HIV infection, which aligns with the pharmacological profile and clinical applications of the drug.