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Medicines > classes : 5HT2A or Plant Medicine & routes: Oral

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Active alkaloid is cytisine, a nicotinic acetylcholine receptor agonist. NOT a classical 5-HT2A psychedelic. (1) · Active principle is thujone, a GABA-A antagonist (the opposite of most CNS depressants). Also present in cooking sage (''Salvia officinalis''), tansy, and ''Thuja'' cedars. (1) · Caffeine (1.5–2%) + theobromine + kolanin (a glycoside). (1) · Caffeine (highest of the ''Ilex'' genus) plus saponins that produce ritual vomiting at high doses. (1) · Caffeine (sometimes called 'mateine' historically, though chemically identical), theobromine, theophylline, plus polyphenols. (1) · Caffeine + theophylline + L-theanine. L-theanine (an amino acid unique to tea) modulates glutamate and produces an 'alpha-wave' calming overlay on caffeine's stimulation, hence tea's reputation as a 'cleaner' stimulant than coffee. (1) · Caffeine is a non-selective adenosine A1/A2A receptor antagonist; also weak PDE inhibition. Beans contain theobromine (3,7-DMX) and theophylline (1,3-DMX) in smaller amounts. (1) · Contains the β-carboline alkaloids harmine, harmaline, and tetrahydroharmine, reversible monoamine oxidase inhibitors (RIMAs) that allow oral DMT to reach the brain. (1) · Highest natural caffeine content of any plant (2–7% by dry weight, ~2–4× coffee). Caffeine is bound to tannins, producing a slower release than pure coffee caffeine. (1) · Partial agonist at D2 and 5HT1A. Antagonist at 5HT2A, α1A, α1B, α2C. More potent 5HT2A antagonism, 5HT1A partial agonism, and α1 antagonism (relative to D2 partial agonism) than aripiprazole, proposed to reduce akathisia and enhance affective/cognitive effects. (1) · Primary alkaloid is theobromine (3,7-dimethylxanthine), with minor caffeine. Also contains phenethylamine, anandamide (an endogenous cannabinoid), tryptophan (serotonin precursor), and flavanols. The combined effect is mild stimulation + mood elevation. (1) · Tropane alkaloids: hyoscyamine (dominant; the racemic form is atropine), scopolamine. Competitive muscarinic antagonism. (1) · Tropane alkaloids: hyoscyamine, scopolamine, atropine, apoatropine. (1) · Tropane alkaloids: hyoscyamine, scopolamine, in higher seed concentrations than belladonna or datura. (1) · Tropane alkaloids: scopolamine (dominant), hyoscyamine, atropine. Competitive antagonism at muscarinic acetylcholine receptors. (1)
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