Bacopa monnieri
Ayurvedic nootropic herb (Brahmi). Bacosides modulate acetylcholine and GABA synthesis. RCTs support cognitive enhancement in healthy adults and children with ADHD. Requires 8-12 weeks for full benefit.
How it works (mechanism of action)
Bacosides enhance protein kinase activity in hippocampus promoting synaptic receptor synthesis. Inhibit acetylcholinesterase and butyrylcholinesterase. Reduce 5-HT2C receptor activity and tryptophan hydroxylase 2 decreasing serotonin turnover in chronically stressed states.
Evidence grades: A=Strong RCT evidence · B=Good clinical trials · C=Limited trials · D=Preliminary/traditional
Cholinergic activity: may inhibit cholinesterase — caution with anticholinergic drugs, cholinesterase inhibitors (donepezil, rivastigmine — additive). GI effects: nausea, diarrhoea (take with food). Drug interactions: calcium channel blockers, phenothiazines. Thyroid: minor reduction in T4 and T3 in some studies — monitor thyroid function. Pregnancy: insufficient data.
