NCI Drug Dictionary

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The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.

varenicline
A partial agonist of the nicotinic acetylcholine receptor (nAChR) subtype alpha4beta2. Nicotine stimulation of central alpha4beta2 nAChRs located at presynaptic terminals in the nucleus accumbens causes the release of the neurotransmitter dopamine, which may be associated with the experience of pleasure; nicotine addiction constitutes a physiologic dependence related to this dopaminergic reward system. As an AChR partial agonist, varenicline attenuates the craving and withdrawal symptoms that occur with abstinence from nicotine but is not habit-forming itself. Check for active clinical trials using this agent. (NCI Thesaurus)
US brand name:Chantix
Foreign brand name:Champix
Code name:CP-526555
Chemical structures:6,10-methano-6H-pyrazino[2,3-h][3]benzazeprine, 7,8,9,10-tetrahydro, (2R,3R)-2,3-dihydroxybutanedioate (1:1)
7,8,9,10-tetrahydro-6,10-methano-6H-pyrazino(2,3-h)(3)benzazepine (2R,3R)-2,3-dihydroxybutqanedioate