The process of drug absorption plays a very important role, directly affecting the therapeutic effect of the drug. There are many different routes of drug absorption, whereby each route of drug absorption has its own advantages and disadvantages.

The absorption of the drug depends on the emptying time of the stomach, so the patient needs to be based on the drug that is less soluble or longer to dissolve, but drink it on an empty stomach or take it after a meal. In addition, food can alter drug metabolism and elimination. Conversely, drugs can also affect the metabolism of certain substances in food. So how do drugs and foods interact?

Gastrointestinal absorption is the entry of the drug into the general circulation of the body. In addition, the drug can also be given via injection, inhalation and percutaneous.