The hazards of long-term anti-allergy drugs include drowsiness, dry mouth, thirst, glaucoma, cataract and damage to liver and kidney function, as follows: 1. Drowsiness: after long-term use of drugs and control of the disease, patients need to carry out gradually decreasing treatment in order to reduce the hazards of drowsiness; 2. Dry mouth and thirst: while treatment, patients need to moderately drink drinks, plain water and other beverages in order to reduce the impact of dry mucous membranes; 3, Glaucoma and cataract: Patients need to have regular checkups and should be treated promptly if symptoms appear; 4. Liver and kidney function damage: Patients need to have regular blood tests and liver and kidney functions after treatment in order to monitor adverse reactions.