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Promethazine Hydrochloride Injection.

Effects and efficacy:
Used for various allergic diseases (urticaria, angioedema, anaphylactic shock, allergic reaction to blood or blood products). Prevent and treat motion sickness, sedation, hypnosis. Treat vomiting caused by surgery, radiation sickness or drugs. As a component of compound cough suppressants.
Usage and dosage:
Anti-allergic: 25mg for adults, 2-3 times/day; 5-15mg for children 1-5 years old; 10-25mg for 5-10 years old; for severe allergies, the drug solution can be diluted and slowly injected intravenously, at a rate not exceeding 25mg/min. Sedation and hypnosis: 50mg for adults, 15-25mg for children 1-5 years old; 20-25mg for 6-10 years old, take before bedtime. Give before anesthesia Drug: 25-50mg. Antiemetic: 0.25-0.5mg/kg, if necessary, once every 4-6h, no more than 100mg in 24h, severe vomiting can be injected intramuscularly. Anti-motion sickness: Take 25mg 30min before departure; children under 5 years old use half the adult dose.
Adverse reactions:
Common ones include drowsiness, dizziness, dry mouth, and photosensitivity. Occasionally there are symptoms of gastrointestinal irritation, jaundice and extrapyramidal symptoms, and rare leukopenia and granulocytopenia. Common tachycardia or bradycardia, transient mild increase in blood pressure, and occasional hypotension after injection. Excessive doses can cause convulsions, followed by central nervous system depression.
Drug contraindications:
Allergic to this product is prohibited during lactation