1. Usage

1. Oral administration: 12.5 to 25 mg each time, 2 to 3 times a day.

2. Intramuscular injection: 2.5% 1~2ml (25~50mg) each time.

3. Intravenous injection: It is not suitable for subcutaneous injection due to irritation.

2. Dosage

1. Commonly used dosage for adults

(1) Oral administration: ① Anti-allergic, 12.5 mg once, 4 times a day, after meals and before going to bed, 25 mg before going to bed if necessary;

② Stop For vomiting, start with 25 mg once, and if necessary, take 12.5-25 mg every 4 to 6 hours;

③ Anti-vertigo, 25 mg once, 2 times a day if necessary; ④ Sedation and hypnosis, 25-50 mg once, Double if necessary.

(2) Intramuscular injection: ① Anti-allergy, 25mg once, repeat after 2 hours if necessary; 25-50mg can also be injected intramuscularly in severe allergy, the maximum dose shall not exceed 100mg, in special emergency situations , can be diluted to 0.25% with sterile water for injection, and injected slowly intravenously;

② Antiemetic, 12.5-25 mg, repeat every 4 hours if necessary;

③ Sedation and hypnosis, once 25-50mg.

2. Commonly used dosage in children

(1) Oral administration: ① Anti-allergy, 0.125 mg/kg based on body weight or 3.75 mg/m2 based on body surface area, once every 4 to 6 hours, or before going to bed 0.5mg/kg body weight or 15mg/square meter based on body surface area; calculated based on age, the daily dose is 5-10mg for those under 1 year old, 5-15mg for 1-5 years old, and 10-25mg for those over 6 years old, once or divided into 2 times Give;

② Antiemetic, according to body weight 0.25-0.5mg/kg or according to body surface area 7.5-15mg/square meter, once every 4 to 6 hours if necessary, or 10-25mg when necessary It can be administered every 4 to 6 hours;

③ Anti-dizziness, 0.5mg/kg according to body weight or 15mg/square meter according to body surface area, once every 12 hours or 12.5 times if necessary —25 mg twice a day;

④Sedation and hypnosis, if necessary, 0.5-1 μg/kg based on body weight or 15-30 mg/m2 based on body surface area.

(2) Intramuscular injection: ① Anti-allergy, 0.125 mg/kg based on body weight or 3.75 mg/m2 based on body surface area, once every 4-6 hours;

② Anti-vertigo, 0.5 mg/kg based on body weight or 15 mg/m2 based on body surface area, or 6.25-12.5 mg three times a day can be given as needed before going to bed;

③ Anti-vomiting, each dose 0.25-0.5mg/kg body weight or 7.5-15mg/m2 based on body surface area, repeat every 4-6 hours if necessary, or 12.5-25mg once, repeat every 4-6 hours if necessary;

④ For sedation and hypnosis, if necessary, 0.5-1 mg/kg of body weight each time, or 12.5-25 mg each time.

Promethazine Hydrochloride Tablets (also known as Phenergan) are tablets. It can be used for symptoms such as various allergies (such as asthma, urticaria, etc.), vomiting during pregnancy, dizziness caused by boating, etc.