Promethazine is recommended to be injected intramuscularly. If promethazine is pushed rapidly and in large quantities quietly it can cause a series of adverse reactions in patients. For example, mental overexcitation or dizziness, dizziness, nausea, vomiting, tachycardia, arrhythmia, or even stimulation of the gastrointestinal tract leading to nausea, vomiting, reflex abdominal pain, etc. The following remedies can be applied. 1. 10mg of diazepam injection can be given immediately by static push or intramuscular injection to compensate for the overexcitation of the nervous system caused by iproniazid. 2. Hydrochlor The patient should be given hydrochlorothiazide and furosemide to accelerate the metabolism of promethazine in the body through the kidneys to quickly excrete promethazine from the body. 3. Heart rate, blood pressure, pulse and central venous and oxygen saturation should also be monitored, and antiarrhythmic symptomatic treatment should be given in case of arrhythmia and tachycardia.