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Bensylyt: Full Drug Profile

Medically reviewed by Min Clinic Staff | Updated: January 2026

Bensylyt - General Information

An alpha-adrenergic antagonist with long duration of action. It has been used to treat hypertension and as a peripheral vasodilator.

 

Pharmacology of Bensylyt

Bensylyt is indicated for the control of episodes of hypertension and sweating that occur with a disease called pheochromocytoma. If tachycardia is excessive, it may be necessary to use a beta-blocking agent concomitantly. Bensylyt is a long-acting, adrenergic, alpha-receptor blocking agent which can produce and maintain "chemical sympathectomy" by oral administration. It increases blood flow to the skin, mucosa and abdominal viscera, and lowers both supine and erect blood pressures. It has no effect on the parasympathetic system. Bensylyt works by blocking alpha receptors in certain parts of the body. Alpha receptors are present in the muscle that lines the walls of blood vessels. When the receptors are blocked by Bensylyt, the muscle relaxes and the blood vessels widen. This widening of the blood vessels results in a lowering of blood pressure.

 

Bensylyt for patients

 

Bensylyt Interactions

Dibenzyline (phenoxybenzamine hydrochloride) may interact with compounds that stimulate both alpha- and beta- adrenergic receptors (i.e., epinephrine) to produce an exaggerated hypotensive response and tachycardia.

Dibenzyline blocks hyperthermia production by levarterenol, and blocks hypothermia production by reserpine.

 

Bensylyt Contraindications

Conditions where a fall in blood pressure may be undesirable.

 

Additional information about Bensylyt

Bensylyt Indication

For the treatment of phaeochromocytoma (malignant), benign prostatic hypertrophy and malignant essential hypertension.

Mechanism Of Action
Bensylyt produces its therapeutic actions by blocking alpha receptors, leading to a muscle relaxation and a widening of the blood vessels. This widening of the blood vessels results in a lowering of blood pressure.
Generic Name
Phenoxybenzamine
Synonyms
Fenossibenzamina [Dcit]; Fenoxibenzamina [Inn-Spanish]; Phenoxybenzamine Hcl; Phenoxybenzamine Hydrochloride; Phenoxybenzaminum [Inn-Latin]; POB HCl
Drug Category
Vasodilator Agents; Antihypertensive Agents
Drug Type
Small Molecule; Approved
Other Brand Names containing Phenoxybenzamine
Bensylyt; Bensylyt Nen; Bensylyte; Benzylyt; Dibenylin; Dibenyline; Dibenzyran; Dibenzyline; Dibenzylene; Dibenzyline Hydrochloride;
Absorption
Twenty to 30 percent of orally administered phenoxybenzamine appears to be absorbed in the active form.
Toxicity (Overdose)
Symptoms of overdose are largely the result of block of the sympathetic nervous system and of the circulating epinephrine. They may include postural hypotension resulting in dizziness or fainting, tachycardia, particularly postural, vomiting; lethargy, and shock.
Half Life
24 hours
Dosage Forms of Bensylyt
Capsule Oral
Chemical IUPAC Name
N-(2-chloroethyl)-1-(phenoxy)-N-(phenylmethyl)propan-2-amine
Chemical Formula
C18H22ClNO
Organisms Affected
Humans and other mammals