Coenzyme
From Memory Alpha, the free Star Trek reference.
A coenzyme is a biological molecule that facilitates enzymatic actions. They can 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. (VOY: "Critical Care")
