Adverse effects of Benzedrine are as follows: 1. dizziness, disorientation as if there is no sense of orientation; 2. headache, insomnia, drowsiness and memory loss in long-term users of the drug. Driving and high-risk activities should not be engaged during the medication; 3. Sweating and heat dissipation may be reduced. So for patients with benzhexol should not be exposed to hot environment; 4, dry mouth, dry throat, continuous dry mouth can lead to oral discomfort, but also dental diseases such as dental caries, periodontal disease, and even oral candidiasis; 5, there can be urination difficulties, blurred vision, dilated pupils, photophobia, etc., because it will increase the eye pressure, for closed angle glaucoma is not recommended; 6, there can be restlessness, abnormal excitement, and even mental disorders. When the drug is used for a long time, patients appear depression, hallucinations, confusion of consciousness or insanity. The current effect of low dose use can be, there will be adverse reactions to psychiatric symptoms.