NCI Drug Dictionary
The NCI Drug Dictionary contains technical definitions and synonyms for drugs/agents used to treat patients with cancer or conditions related to cancer. Each drug entry includes links to check for clinical trials listed in NCI's List of Cancer Clinical Trials.
- phentolamine mesylate
The mesylate salt of a synthetic imidazoline with alpha-adrenergic antagonist activity. As a competitive alpha-adrenergic antagonist, phentolamine binds to alpha-1 and alpha-2 receptors, resulting in a decrease in peripheral vascular resistance and vasodilatation. This agent also may block 5-hydroxytryptamine (5-HT) receptors and stimulate release of histamine from mast cells. Check for active clinical trials or closed clinical trials using this agent. (NCI Thesaurus)
US brand names: Regitine
Abbreviation: PTM Chemical structure: m-[N-(2-Imidazolin-2-ylmethyl)-p-toluidino]phenol monomethanesulfonate