| acyclovir | <drug> An antiviral medication used to treat herpes virus infections. Nucleoside analogue (hydroxyethoxymethyl guanine) with antiviral properties, active against both type 1 and 2 herpes virus. Inactive until phosphorylated by specific viral enzyme, thymidine kinase and then blocks replication by inhibiting viral DNA synthesis. (11 Nov 1997) |
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| TAB vaccine | A suspension of killed typhoid and paratyphoid A and B bacilli. See: typhoid vaccine. Synonym: TAB vaccine. (05 Mar 2000) |