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The primary application for phentolamine is for the control of hypertensive emergencies, most notably due to pheochromocytoma. [5]It also has usefulness in the treatment of cocaine-induced cardiovascular complications, where one would generally avoid β-blockers (e.g. metoprolol), as they can cause unopposed α-adrenergic mediated coronary vasoconstriction, worsening myocardial ischemia and ...
Nonselective alpha blockers, such as phenoxybenzamine or phentolamine, can be used to mitigate this disease. Pheochromocytoma is a disease in which a catecholamine secreting tumor develops. [ 2 ] [ 20 ] Specifically, norepinephrine and epinephrine are secreted by these tumors, either continuously or intermittently. [ 21 ]
Common examples of alpha 1 blockers are Tamsulosin, Prazosin, Phentolamine, and Phenoxybenzamine. [1] Each agent has its own off-label uses, some examples include Tamsulosin for urinary disorders, Prazosin for post-traumatic stress disorder -related nightmares and Raynaud phenomenon , Phentolamine for hypertensive crisis and extravasation of ...
Two examples of competitive adrenergic antagonists are propranolol and phentolamine. Phentolamine is a competitive and nonselective α-adrenoreceptor antagonist. Propranolol is a β-adrenoreceptor antagonist. [8]
A perioperative hypertensive crisis is first treated with a 5.0 milligram (mg) intravenous bolus of phentolamine, with additional 5.0 mg dose every ten minutes until the blood pressure falls within an acceptable range.
Benign prostatic hyperplasia (BPH) is an enlarged prostate gland.Alpha-1 blockers are the most commonly used medicine to treat BPH. [6] Alpha-1 blockers are first line treatment for the symptoms of BPH in men.
Trimix is a combination of three drugs: alprostadil, papaverine, and phentolamine. These medications work in combination to increase blood flow to the penis, resulting in an erection. [1] [2] [3] Alprostadil is a prostaglandin vasodilator that allows more blood to flow into the area by relaxing the smooth muscle in the blood vessels of the penis.
Adrenergic blocking agents are a class of drugs that exhibit its pharmacological action through inhibiting the action of the sympathetic nervous system [1] in the body. The sympathetic nervous system(SNS) is an autonomic nervous system that we cannot control by will.
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