A potent 24th-century stimulant, apparently derived from the older cordrazine, which Starfleet doctors use to boost failing neural or cardiac activity in patients who are close to death.
Tricordrazine is one of the stronger stimulants in the Starfleet medical inventory of the 24th century. Its name suggests a descendant of cordrazine, the drug that sent Doctor McCoy into a paranoid frenzy in the original series, and like its ancestor it is treated with respect: doses are measured carefully and it is kept for serious cases.
Its most prominent use is in the Next Generation episode Shades of Gray, in which Commander Riker is infected by a parasitic organism on Surata IV that attacks his nervous system. Doctor Pulaski administers tricordrazine to stimulate his neurons while she uses a neural device to provoke the memories that eventually drive the infection out.
The drug is named again in later sickbay scenes across the franchise as a standard option for reviving a patient whose vital signs are collapsing.