What does didanosine mean?
Didanosine is a synthetic antiviral medication belonging to the class of nucleoside reverse transcriptase inhibitors (NRTIs). Chemically, it is a purine nucleoside analogue related to inosine, and it works by interfering with the enzyme HIV uses to replicate its genetic material, thereby slowing the progression of HIV infection. Approved by the US Food and Drug Administration in 1991 under the brand name Videx, it was only the second drug licensed for treating HIV after zidovudine, making it historically significant in the fight against AIDS. Didanosine is always prescribed as part of a combination regimen rather than alone, since monotherapy rapidly leads to viral resistance. Although it played a crucial role in early combination therapies, its use has declined considerably because of potential serious side effects, notably pancreatitis and peripheral neuropathy, and because better-tolerated agents have become available. Today it appears mainly in medical literature and accounts of HIV treatment history.
nounA synthetic nucleoside antiviral drug, an analogue of the natural nucleoside deoxyadenosine, used in combination therapy to treat HIV infection.
- A synthetic purine nucleoside analogue antiretroviral drug that inhibits HIV reverse transcriptase, used as part of combination therapy for HIV/AIDS.
"The patient's regimen combined didanosine with a protease inhibitor to suppress viral load."
"Didanosine was among the earliest antiretroviral drugs approved by the FDA in 1991."
"Because of side effects such as pancreatitis, didanosine is now used far less often than newer antiretrovirals."
Rarely pluralized; the word is normally used as an uncountable mass noun referring to the drug.
"Different formulations of didanosines were evaluated in early trials."
Didanosine was one of the first two drugs ever approved in the United States to treat HIV — a lifeline approved in 1991 when options were almost nonexistent.
Reviewed by Deb Chak, Editor. AI-assisted content curated by RJS Tech Solutions LLP.
Etymology of didanosine
The name didanosine is a modern pharmacological coinage, formed from 'dideoxy' plus 'inosine', reflecting both the chemical structure of the drug (a dideoxy derivative) and its parent compound inosine. It entered English usage in the late twentieth century alongside the emergence of antiretroviral research during the AIDS crisis. Its root, inosine, derives from the Greek 'is' (fiber, muscle) via 'inose', a term applied to a substance first obtained from muscle tissue.
How didanosine is actually used
Strictly a medical and pharmacological term; encountered in clinical literature, patient information leaflets, and histories of the AIDS epidemic rather than everyday speech.
Easily confused with didanosine
Inosine is a naturally occurring nucleoside found in the body, whereas didanosine is a synthetic antiviral drug derived chemically from it.