| piracetam | <chemical> A compound suggested to be both a nootropic and a neuroprotective agent. Its efficacy and mechanisms of action are not clear. Pharmacological action: neuroprotective agents, nootropic agents. Chemical name: 1-Pyrrolidineacetamide, 2-oxo- (12 Dec 1998) |
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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) |