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.

hydromorphone hydrochloride
The hydrochloride salt of the semi-synthetic opioid hydromorphone with analgesic activity. Hydromorphone, the hydrogenated ketone of morphine, selectively binds the mu-opioid receptor, a G protein-coupled receptor. Binding stimulates the exchange of guanosine triphosphate (GTP) for guanosine diphosphate (GDP) on the G-protein complex, resulting in inhibition of plasma membrane-associated adenylate cyclase (AC) and a reduction in intracellular cyclic 3',5'-adenosine monophosphate (cAMP) levels. Due to a reduction in cAMP levels, voltage-gated potassium channels are activated, resulting in neuronal hyperpolarization and a reduction in neuronal excitability. In addition, this agent inhibits the opening of voltage-gated calcium channels, resulting in inhibition of calcium entry into neuronal cells and a reduction in the release of nociceptive neurotransmitters such as substance P and glutamate. Check for active clinical trials using this agent. (NCI Thesaurus)

US brand name:Dilaudid
Dilaudid HP