an index corresponding the clinical efficacy of a drug to its safety factor, computed by dividing the median lethal dose by the median effective dose. A drug is frequently thought to be safe only if its is at least ten.

THERAPEUTIC RATIO: "The concept of therapeutic ratios was posited by Paul Ehrich, a German immunologist and bacteriologist."
Cite this page: N., Pam M.S., "THERAPEUTIC RATIO," in, April 29, 2013, (accessed September 26, 2021).