Proprietary Chinese medicines are usually valid for one to three years, after decoction of Chinese medicine in the refrigerator for no more than a week, Chinese medicine tablets according to the specifics of the drug concoction, different shelf life is different. It is recommended that you consult your physician and pharmacist about taking Chinese medicines and their shelf life. Chinese medicines include different dosage forms such as Chinese medicine tablets, proprietary Chinese medicines and Chinese medicine tonics. The shelf life of Chinese medicine tablets of timber type is generally not more than four years, herbal tablets not more than two years, and Chinese medicine tablets of minerals are generally not more than 10 years. Chinese medicine soup medicine because there is no preservative inside after decoction, room temperature preservation is generally no more than two days, if placed in the refrigerator within the cold storage is not recommended more than a week, too long time medicine is easy to deteriorate. The shelf life of pCms is generally 1 to 3 years. More than the shelf life of the drug can not be taken, the expiration date of the drug to reduce the efficacy of the drug, sometimes there will be drug deterioration, continue to take is not conducive to good health. It is recommended that under the guidance of physicians and pharmacists for medication and shelf life of the consultation, not self-medication, so as not to delay the condition.