The typical duration of pain relief for resorcinol is about 4 hours. Resorcinol is mainly used for spasmodic pain caused by digestive system diseases, mainly through intravenous infusion, intramuscular injection, etc., to give the patient pain relief treatment, but its half-life in the blood is 15 minutes, when it is input the patient will appear to stop the pain effect, but because of the short half-life, the patient’s pain relief lasts for a short period of time, usually about 4 hours, the concentration of the drug in the body has been very little. If the patient’s pain is more obvious, need to use other drugs for pain management. Resorcinol belongs to the short-acting painkillers, if the patient’s pain time is longer, the pain is more intense, it is recommended to replace other painkillers such as morphine, dizocin, etc., for pain relief treatment. However, all painkillers should be administered under the guidance of a physician, and should not be purchased and chosen on their own.