The advantages of oral liquid are small dose, good taste, fast absorption, rapid effect, easy for patients to accept. 1. It belongs to liquid-type preparations, most of which are solution-type, with fast absorption and rapid effect. 2. It adopts single-dose package, which is convenient to carry and take, easy to save, safe and effective. 3. Save the trouble of decoction, conducive to the treatment of acute diseases. 4. Suitable for industrialized production, the preparation process should be strictly controlled, oral liquid quality and efficacy stability. 5. Small dosage, good taste, easy for patients, especially for children, infants and young children to accept. After opening the cap of the bottle, pay attention to whether there is a break in the mouth of the bottle to prevent the entrance of fine glass shavings; insert the straw through the cap into the bottom of the bottle, and use the straw to suck up the medicine, but the force should not be too strong to avoid choking the lungs; it should be shaken well before drinking. Drugs need to follow the doctor’s instructions for rational application.