Whether taking medicine before or after meals, the interval should be between half an hour and one hour, because taking medicine scientifically in this way can make the medicine play a better role in the human body, thus improving the therapeutic effect.

Taking medicine before and after meals depends on the kind of medicine you take. In addition, both adults and children should be the same. Because there is basically no food in the stomach and small intestine cavity before meals, taking medicine at this time will not be disturbed by food, and it can play the role of medicine quickly and thoroughly. Therefore, all drugs that need to be absorbed quickly and without irritation should be taken orally before meals. Drugs required to be taken orally before meals are:

1. Stomach-invigorating and acid-making drugs: such as weishuping, calcium bismuth magnesium, aluminum hydroxide, the mixture of Gentiana scabra and rhubarb, turtle shell tincture, etc.

2. Antidiarrheal drugs: such as activated carbon, basic bismuth carbonate, tannic acid protein, etc.

3. Expensive drugs: such as Shiquan Dabu Pill and Liuwei Dihuang Pill.

4. Gastrointestinal antispasmodics: such as atropine, belladonna, antiemetics, etc.

5. cholagogic drugs: such as magnesium sulfate and bile salts.

6. Insect repellent: such as repellent, mebendazole, etc.

Except for the drugs that must be taken before meals and before going to bed, the rest can be taken orally after meals. Especially drugs that are irritating to the stomach, such as aspirin, sodium salicylate, phenylbutazone, indomethacin, quinine, ferrous sulfate, tribromic acid tablets, berberine and so on. Must be taken after meals;

Drugs such as griseofulvin are absorbed by oily foods and should also be taken after meals; Drugs that reduce the utilization rate of the body due to diet, such as nitrofurantoin, propranolol, phenytoin sodium, etc. It is best to take orally before meals 1 hour or 2 hours after meals. Oral medication before going to bed:

1. laxatives: such as rhubarb and phenolphthalein. Take it 8- 12 hours after taking it, and it is ideal to take it before going to bed and defecating the next morning.

2. Hypnotic drugs: such as chloral hydrate and phenobarbital. Can be taken temporarily or in advance before going to bed, so as to fall asleep at the right time.