Drug reference
phentolamine
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Drug class
Cardiovascular (Miscellaneous(CVS))
Mechanism of action
Has positive inotropic and chronotropic effect on the heart. Blocks alph-adrenergic receptors to briefly antagonize circulating epinephrine and norepinephrine to reduce hypertension caused by alpha effects of the endogenous catecholamines.
Common side effects
- Injection site pain
- Nasal congestion
- Post-treatment pain
- Diarrhea
Related conditions
Frequently asked questions
What drug class is phentolamine?
phentolamine belongs to: Cardiovascular.
How does phentolamine work?
Has positive inotropic and chronotropic effect on the heart. Blocks alph-adrenergic receptors to briefly antagonize circulating epinephrine and norepinephrine to reduce hypertension caused by alpha effects of the endogenous catecholamines.
What are the common side effects of phentolamine?
Injection site pain, Nasal congestion, Post-treatment pain, Diarrhea
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