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Richard I. Shader, MD, Bethesda, Md, has written that, in his Clinical Note titled "Sexual Dysfunction Associated With Thioridazine" published in The Journal on June 15 (188:1007-1008), "...In each instance pertaining to thioridazine hydrochloride dosage 'Q.D.' was incorrectly interpreted as 'four times a day' rather than correctly as 'each day.' "
Dosage Errors. JAMA. 1964;189(6):517. doi:10.1001/jama.1964.03070060127020