Webster’s Revised Unabridged Dictionary · 1913
Contraindicate
Con′tra·in·′di·cate (·kāt), v. t. [imp. & p. p. Contraindicated; p. pr. & vb. n. Contraindicating.] (Med.) To indicate, as by a symptom, some method of treatment contrary to that which the general tenor of the case would seem to require.
Contraindicating symptoms must be observed. Harvey.