Lorazepam may cause gastrointestinal, central nervous system, respiratory system and other adverse reactions after taking the drug. 1. Gastrointestinal adverse reactions: nausea, decreased appetite, constipation and other symptoms may occur. 2. Adverse reactions of the central nervous system: generally manifested as dizziness, drowsiness, fatigue, memory impairment, amnesia and so on. 3. Respiratory system adverse reactions: symptoms such as respiratory depression, apnea, worsening of sleep apnea, and upper respiratory tract obstruction may occur. Lorazepam after taking the drug, there may be some other adverse reactions, such as rage, agitation, anxiety, hallucinations, etc. If the adverse reactions are obvious after taking the drug, it is necessary to stop the drug and consult a doctor if necessary. Allergic to the components of the drug, acute closed-angle glaucoma patients are prohibited. Lorazepam must be taken under the direction of a doctor, and should not be taken on its own.