1) Antihypertensive agent 
==Mechanism of action== Guanadrel is a postganglionic adrenergic blocking agent. Uptake of guanadrel and storage in sympathetic neurons occurs via the norepinephrine pump; guanadrel slowly displaces norepinephrine from its storage in nerve endings and thereby blocks the release of norepinephrine normally produced by nerve stimulation. The reductio...
(gwah´nә-drәl) an adrenergic neuron blocking agent, used in the treatment of hypertension; used as the sulfate salt.
a substance, CHNOS, used as an antihypertensive.