Contraindication

Con´tra`in`di`ca´tion

(med.) An indication or symptom which forbids the method of treatment usual in such cases.

Noun

contraindication - (medicine) a reason that makes it inadvisable to prescribe a particular drug or employ a particular procedure or treatment

Antonyms:

indication - (medicine) a reason to prescribe a drug or perform a procedure; "the presence of bacterial infection was an indication for the use of antibiotics"

antagonism, antipathy, antithesis, clashing, collision, conflict, confrontation, contradiction, contradistinction, contraposition, contrariety, contrast, counterposition, cross-purposes, disagreement, discrepancy, hostility, inconsistency, inimicalness, oppositeness, opposition, opposure, oppugnance, oppugnancy, perversity, polarity, repugnance, showdown