Huperzine A is a naturally occurring sesquiterpene alkaloid AChE inhibitor.

Galanthamine hydrobromide is a natural occuring AchE inhibitor with IC50 value of 410nM and allosteric potentiator at neuronal nAchRs, used for the treatment of cognitive decline in mild to moderate Alzheimer's disease and various other memory impairments.

Jatrorrhizine is a protoberberine alkaloid isolated from some plant species like Enantia chlorantha. It can inhibit MAO-A and MAO-B noncompetitively with IC50 value of 4μM and 62μM, respectively. Also, it has antiinflammatory, antimicrobial and antifungal activity.

Loganin is a naturally occuring iridoid glycoside with antioxidant, hepatoprotective and neuroprotective effects, as well as a COX-1 inhbitor with IC50 value of 3.55 µM, suppressing the formation of TNF-α, and diminishing the production of nitric oxide.

Itopride HCl is a D2 antagonist and an AChE inhibitor with an IC50 value of 2.04±0.27 μM. It is a prokinetic benzamide derivative unlike domperidone.

Dehydroevodiamine HCl is an alkaloid isolated from E. rutaecarpa and possesses anti-inflammatory, antiarrhythmic, hypotensive, and anti-amnesic biological activities.

Donepezil is a centrally acting reversible AchE inhibitor with IC50 of 8.12 nM and 11.6 nM for bAChE and hAChE, respectively, a medication used to treat Alzheimer's disease.

Palmatine, a natural product isolated and purified from the rhizomes of Coptis chinensis Franch., is an inhibitor of dopamine generation. Palmatine could potentially be developed for the treatment of flavivirus infections.