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for educational and safety purposes
Varenicline and Cytisine both come up in the same conversations; they overlap on Acetylcholine and Dopamine. Varenicline: varenicline (chantix/champix) is a cytisine-derived nicotinic partial agonist and a first-line smoking-cessation drug; a high-affinity partial agonist at alpha4beta2 (its core mechanism), full agonist at alpha7, partial at alpha3beta4, and only a weak partial agonist at the alpha6beta2* dopamine-terminal receptors that gate nicotine reward; effective for quitting, with nausea as the main trade-off. Cytisine: cytisine (tabex, cytisinicline) is a natural plant-alkaloid nicotinic partial agonist and the structural parent of varenicline; a high-affinity alpha4beta2 partial agonist, high-efficacy alpha3beta4 agonist, and only a weak partial agonist at the alpha6beta2* dopamine-terminal receptors that gate nicotine reward; a cheap, trial-validated smoking-cessation drug rather than a nootropic.
varenicline (chantix/champix) is a cytisine-derived nicotinic partial agonist and a first-line smoking-cessation drug; a high-affinity partial agonist at alpha4beta2 (its core mechanism), full agonist at alpha7, partial at alpha3beta4, and only a weak partial agonist at the alpha6beta2* dopamine-terminal receptors that gate nicotine reward; effective for quitting, with nausea as the main trade-off.
cytisine (tabex, cytisinicline) is a natural plant-alkaloid nicotinic partial agonist and the structural parent of varenicline; a high-affinity alpha4beta2 partial agonist, high-efficacy alpha3beta4 agonist, and only a weak partial agonist at the alpha6beta2* dopamine-terminal receptors that gate nicotine reward; a cheap, trial-validated smoking-cessation drug rather than a nootropic.
both fingerprints on one instrument; where the marks line up the two compounds work the same lever, where a slot goes dark only one of them touches it. read straight from each entry's affinity table; nothing here is invented.
partial agonist
full/high-efficacy agonist
high-affinity partial agonist
high-affinity partial agonist (low intrinsic efficacy)
full agonist
partial-to-full agonist
weak partial agonist
weak/low-efficacy partial agonist
weak partial agonist
partially substitutes / attenuates
strengths are the entries' qualitative ratings (strong / moderate / weak); Ki and EC50 figures appear where an entry records them.
easiest to source: Cytisine is currently listed by more trusted vendors (1), so it's the simpler one to get hold of. for effects and safety, read each full entry; this is educational, not medical advice.