clonidine + yohimbine + metoclopramide + alpha-methyldopa

This is a combination of four small molecule drugs—clonidine, yohimbine, metoclopramide, and alpha-methyldopa. Each component has distinct pharmacological actions: - **Clonidine** is an alpha-2 adrenergic receptor agonist that reduces sympathetic outflow from the central nervous system, leading to decreased blood pressure and use in hypertension and ADHD[5][9]. - **Yohimbine** is an alpha-2 adrenergic receptor antagonist that increases sympathetic outflow by blocking presynaptic inhibition of norepinephrine release; it has been used for erectile dysfunction and as a mydriatic[2][3][4]. - **Metoclopramide** is a dopamine D2 receptor antagonist with antiemetic and prokinetic properties (not detailed in search results but well established). - **Alpha-methyldopa** (methyldopa) is another centrally acting alpha-2 adrenergic agonist used primarily for hypertension management, especially in pregnancy[7][8]. The combination would result in complex interactions at the level of central noradrenergic signaling due to opposing effects of clonidine/alpha-methyldopa (agonists) versus yohimbine (antagonist), along with dopaminergic antagonism from metoclopramide. There are no known approved pharmaceutical products or clinical indications for this exact four-drug combination.

Other names

clonidine + yohimbine + metoclopramide + alpha-methyldopa