Prescription drugs are a class of medicines that must be purchased and used only with a doctor’s prescription, and which should be used under a doctor’s supervision because they usually have certain adverse reactions or other potential effects on the body. Drugs can generally be categorized into prescription and over-the-counter drugs based on their pharmacological properties. Prescription drugs usually have some side effects or other potential effects on the body, their adverse reactions are relatively more frequent and they may also have addictive properties. Therefore, they should always be purchased with a doctor’s prescription and used under medical supervision. The types of prescription drugs generally include some analgesics and other specially regulated drugs, drugs with certain toxicity or potential effects, and drugs that are not suitable for patients to use on their own due to the method of use and other reasons. Prescription drugs should be taken under the guidance of a physician, and should not be used on one’s own to avoid delays or adverse reactions.