The usage of omeprazole may vary according to its dosage form, commonly used dosage forms include oral and injectable dosage forms, the specific use of medication should be carried out in accordance with the doctor’s instructions. First of all, it should be clear that omeprazole is suitable for the treatment of peptic ulcer, gastroesophageal reflux disease, Droege’s syndrome and other diseases, but is prohibited for those who are allergic to it, and headache, nausea and other adverse reactions may occur in the process of using the drug. 1. Oral dosage form: such as omeprazole enteric-coated capsules. Commonly used in the treatment of peptic ulcer 20mg / times, 1 time / day; maximum can be increased to 40mg / times, 1 time / day. Gastroesophageal reflux disease commonly used 10-20mg / times, 1 time / day; Zhuo – Ai syndrome starting dose of 60mg / times, 1 time / day, can be adjusted in the range of 20-120mg. 2. Injectable dosage form: such as omeprazole sodium for injection. Recommended dose for the treatment of peptic ulcer, gastroesophageal reflux disease is 40mg/times, 1 time/day, 20~30 minutes intravenous drip; Dreh-Ayer’s syndrome starting dose of 60mg/times, 1 time/day. Individualized adjustments can be made, and when the dosage exceeds 60mg, it should be divided into 2 injections. Those who do have the need to use omeprazole must choose and adjust the dosage form and dose according to the actual situation of the individual under the guidance of the doctor, in order to strive for a good prognosis. Do not blindly use the drug or increase or decrease the dosage on your own, in order to avoid adverse consequences.