NCI Dictionary of Cancer Terms

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The NCI Dictionary of Cancer Terms features 7,804 terms related to cancer and medicine.

Browse the dictionary by selecting a letter of the alphabet or by entering a cancer-related word or phrase in the search box.

tramadol hydrochloride
(TRA-muh-dol HY-droh-KLOR-ide)
A drug used to treat moderate to severe pain in adults. It binds to opioid receptors in the central nervous system. Tramadol hydrochloride is a type of analgesic agent and a type of opioid. Also called Ultram.