1. Excessive dosage: Conventional dosage has low toxicity. Excessive use may cause headache, dizziness, blood pressure that first rises and then falls, abdominal pain, difficulty breathing, and gastrointestinal bleeding.

2. Allergic reaction: Intramuscular injection of Dilong injection may cause allergic reaction, manifested as numbness of the lips, rash, pale face, profuse sweating, difficulty breathing, and decreased blood pressure.