Some drugs have a central depressant effect and produce drowsiness after taking them. It is recommended that such drugs be taken at bedtime to reduce the impact on daytime work. Drugs with a central inhibitory effect are sedative-hypnotic drugs, antihistamines, various types of compound cold medicines, anti-anxiety drugs, antipsychotics, etc. Taking such drugs can produce a central inhibitory effect, so that the drowsy effect of the drug user, mental depression, or even depression and affect the daytime work. Therefore, you should not engage in high-precision operations, driving, or working at height during the medication period to prevent accidents. If the drug is taken once a day, it is better to take it in the evening. Taking it before bedtime can effectively reduce the adverse effects on the daytime work.