Coenzyme
A coenzyme was a biological molecule that facilitated enzymatic actions. They could be used to slow the progress of chromovirus.

On the Dinaali Hospital Ship 4-2 in 2377, Doctor Voje informed The Doctor that Tebbis' chromoviral infection had worsened rapidly because his coenzyme allottment had been reduced, due to his low treatment coefficient. ()
Biology
Drugs