专家提示：不要自行购买和使用处方药

Core Viewpoint - The public is advised not to self-purchase or use prescription drugs without a doctor's diagnosis and prescription, emphasizing the importance of following medical guidance for safe medication use [1][2]. Group 1: Prescription Drugs - Prescription drugs are defined as medications that require a doctor's prescription for purchase and use, including injectables, antibiotics, antihypertensives, and antidiabetics [1]. - The risks associated with prescription drugs are significantly higher, and improper use can lead to severe adverse reactions or drug dependence [1][2]. - It is crucial to adhere strictly to the prescribed dosage, method, and duration of treatment as indicated on the prescription [1][2]. Group 2: Over-the-Counter Drugs - Over-the-counter (OTC) drugs are categorized into two types based on safety: Class A (red) and Class B (green) [2]. - Class A OTC drugs must be purchased under the guidance of a pharmacist, while Class B OTC drugs are relatively safer and can be bought in pharmacies, supermarkets, or convenience stores [2]. - Users are advised to carefully read the medication instructions to understand indications, contraindications, and proper usage before taking any OTC drugs [2].