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What is Class B OTC?
2026-07-08 02:47:25
Overview and content structure of Class B OTC
Class B OTC (over-the-counter drugs) refer to drugs that can be purchased in pharmacies or supermarkets without a doctor's prescription. They are relatively safe and suitable for consumers to self-medicate. This article will start from five parts: definition, characteristics, applicable scenarios, common varieties and purchase considerations. First, the basic concepts and classification standards of Class B OTCs are introduced; secondly, the differences and advantages between Class B OTCs and Class A OTCs are analyzed; then typical drugs and applicable symptoms are listed; then suggestions for rational drug use are provided; and finally the key points of purchase are summarized to help consumers use them safely.
The definition and characteristics of Class B OTC

Class B OTC is an over-the-counter drug category classified by the national drug regulatory department based on safety assessment. Its risk level is lower than Class A OTC. It is usually used to treat minor symptoms such as colds and indigestion. This type of medicine has a green OTC logo on the outside and does not require the guidance of a pharmacist when purchasing. It can be sold in supermarkets, convenience stores and other channels. Compared with Class A OTC (red label), Class B OTC has milder ingredients and fewer side effects, such as vitamin supplements, topical anti-itch ointments, etc. Consumers need to look for the approval number (for example, starting with "Z") to ensure the legality of the drug.
The difference between Class B OTC and Class A OTC
The core difference between the two types of OTC lies in risk management and sales channels. Class B OTC is allowed to be sold in non-pharmacy locations, while Class A OTC must be purchased under the guidance of a pharmacist. For example, the antipyretic and analgesic ibuprofen (Class A) must be taken strictly according to the dosage, while Isatis Granules (Class B) are safer. In addition, Class B OTC advertising has fewer restrictions, but the Advertising Law must still be followed when promoting, and the efficacy must not be exaggerated. Common Class B OTCs include:
| Drug name | Efficacy | Manufacturer |
|---|---|---|
| Kyoto Nenjian honey-flavored Sichuan clam loquat ointment | Moisten the lungs and relieve cough | Kyoto Ninjian Main Factory Co., Ltd. |
| Sanjiu Ganmaoling Granules | Relieve cold symptoms | China Resources Sanjiu Pharmaceutical |
Suggestions on the reasonable use of Class B OTC
Although Class B OTCs are relatively safe, you still need to pay attention to medication contraindications. For example, allergy drugs containing antihistamines may cause drowsiness, and drivers should use them with caution; OTC traditional Chinese medicines need to be treated based on syndrome differentiation, such as colds with colds and colds with wind-heat. Consumers are advised to read the instructions carefully and avoid long-term or excessive use. If symptoms do not resolve within 3 days, seek medical attention promptly. It is best to consult a doctor before taking medicine for special groups such as children and pregnant women.
Summary and purchase points
Category B OTC provides convenience for daily health management, but consumers need to keep in mind the principle of “selecting medicines according to symptoms and purchasing according to needs”. When purchasing, pay attention to check the integrity of the drug packaging, validity period and approval number; avoid blindly following advertising trends. The State Food and Drug Administration regularly publishes the list of unqualified drugs, which can be checked on the official website. Through scientific understanding and standardized use, Class B OTC can effectively contribute to public health.
Quote sources:
1. "Regulations on the Classification and Management of Over-the-Counter Drugs" of the State Food and Drug Administration
2. "Chinese Pharmacopoeia" 2020 Edition
3. China Resources Sanjiu Pharmaceutical official website product description
4. Kyoto Ninjian Official Efficacy Statement
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