Doxepin refers to doxepin hydrochloride tablets, which belongs to tricyclic antidepressant drugs, and has relatively large side effects on the human body, which are mainly manifested in some adverse reactions after taking the drug. The side effects of doxepin hydrochloride tablets are mainly manifested as drowsiness and anticholinergic reactions at the initial stage of medication, such as dry mouth, excessive sweating, dizziness, blurred vision, difficulty in defecation, difficulty in urination and so on. Postural upright hypotension and rash may also occur, and in rare cases may lead to seizures, bone marrow suppression, or liver damage. The possible side effects of doxepin hydrochloride tablets are relatively numerous and can be harmful. However, reasonable use of the medication can usually reduce the harm and there is no need to be overly nervous. To avoid adverse effects, glaucoma, epilepsy, hyperthyroidism, a history of heart disease, and allergy to tricyclic antidepressants should be strictly avoided. Doxepin hydrochloride tablets have more side effects, and cardiac function, liver function, renal function and blood picture should be monitored regularly during the use of the drug. If adverse reactions occur, you should go to the hospital in time and follow the professional doctor’s treatment.