NCI Drug Dictionary

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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.

therapeutic hemin
A sterile, lyophilized powder of hemin, the Fe3+ oxidation product of heme (Fe2+), derived from processed red blood cells. Therapeutic hemin appears to inhibit delta-aminolevulinic acid (ALA) synthetase, a rate-limiting enzyme in the porphyrin/heme biosynthetic pathway, resulting in inhibition of the hepatic and/or marrow synthesis of porphyrin precursors. The mechanism by which therapeutic hematin produces symptomatic improvement in patients with acute episodes of the hepatic porphyrias has not been determined. Check for active clinical trials using this agent. (NCI Thesaurus)

US brand name:Panhematin