Clonidine Hydrochloride a centrally acting sympatholytic and Imidazoline-derivative hypotensive agent; selective α2-adrenergic agonist. It stimulates alpha2-adrenergic receptors in the brain-stem to decrease sympathetic nervous system outflow. It is also administered epidurally to treat pain. It is prescribed alone or in combination for the reduction of high blood pressure and is an adjunct for the treatment of cancer pain when pain persists...