Adverse Drug Reaction Classification System

Pharmaceutical Information
Drug Name Phentolamine
Drug ID BADD_D01758
Description A nonselective alpha-adrenergic antagonist. It is used in the treatment of hypertension and hypertensive emergencies, pheochromocytoma, vasospasm of raynaud disease and frostbite, clonidine withdrawal syndrome, impotence, and peripheral vascular disease.
Indications and Usage Used as an aid for the diagnosis of pheochromocytoma, and may be administered immediately prior to or during pheochromocytomectomy to prevent or control paroxysmal hypertension resulting from anesthesia, stress, or operative manipulation of the tumor. Phentolamine has also been used to treat hypertensive crisis caused by sympathomimetic amines or catecholamine excess by certain foods or drugs in patients taking MAO inhibitors, or by clonidine withdrawal syndrome. Other indications include the prevention of dermal necrosis and sloughing following IV administration or extravasation of norepinephrine, decrease in impedance to left ventricular ejection and the infarct size in patients with MI associated with left ventricular failure, treatment of erectile dysfunction through self-injection of small doses combined with papaverine hydrochloride into the corpus cavernosum, and as an adjunct to the management of cocaine overdose to reverse coronary vasoconstriction following use of oxygen, benzodiazepines,and nitroglycerin.
Marketing Status approved
ATC Code C04AB01; V03AB36
DrugBank ID DB00692
KEGG ID D08362
MeSH ID D010646
PubChem ID 5775
TTD Drug ID D01JUF
NDC Product Code Not Available
UNII Z468598HBV
Synonyms Phentolamine | Fentolamin | Phentolamine Mono-hydrochloride | Mono-hydrochloride, Phentolamine | Phentolamine Mono hydrochloride | Rogitine | Z-Max | Phentolamine Mesylate | Mesylate, Phentolamine | Phentolamine Methanesulfonate | Methanesulfonate, Phentolamine | Phentolamine Mesilate | Mesilate, Phentolamine | Regitine | Regityn
Chemical Information
Molecular Formula C17H19N3O
CAS Registry Number 50-60-2
SMILES CC1=CC=C(C=C1)N(CC2=NCCN2)C3=CC(=CC=C3)O
Chemical Structure
ADRs Induced by Drug
*The priority for ADR severity classification is based on FAERS assessment, followed by the most severe level in CTCAE rating. If neither is available, it will be displayed as 'Not available'.
**The 'Not Available' level is hidden by default and can be restored by clicking on the legend twice.
ADR Term ADReCS ID ADR Frequency (FAERS) ADR Severity Grade (FAERS) ADR Severity Grade (CTCAE)
Tachycardia02.03.02.007---
Tenderness08.01.08.005---
Vomiting07.01.07.003--
Acute coronary syndrome02.02.02.015; 24.04.04.011---
Angiopathy24.03.02.007---
Cardiac disorder02.11.01.003---
Mediastinal disorder22.09.03.001---
Procedural pain08.01.08.009; 12.02.05.007---
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