reserpine

Reserpine (Serpalan) is an alkaloid isolated from the root of Rauwolfia serpentina. As an inhibitor of vesicular monoamine transporter 2 (VMAT2), it suppresses the uptake of norepinephrine into storage vesicles, leading to depletion of catecholamines and serotonin in central and peripheral nerve terminals. It has antihypertensive and antipsychotic effects and can be used to induce gastric ulcer and depression models.

L-5-Hydroxytryptophan (L-5-HTP) is a naturally occurring amino acid and dietary supplement that serves as a precursor to the neurotransmitter serotonin. It can be used as an antidepressant, appetite suppressant, and sleep aid, and acts as an antagonist to reserpine. L-5-HTP is widely used in research on myoclonus, fibromyalgia, migraine, and cerebellar ataxia, and is also commonly used to induce epilepsy models.