An aid to the relief of temporary sleep disturbance.nytolampnbsp original tablets contains diphenhydramine hydrochloride 25mgdriving and use of machinery should be avoided as nytol causes drowsiness.avoid alcohol.do not use in the following cases asthma, narrow angle glaucoma, prostatic hypertrophy, stenosing peptic ulcer, pyloroduodenal and bladder neck obstruction, pregnancy, lactation or if taking cns depressants or maois.