Dulcolax, also known as pethidine hydrochloride, is a clinically applied synthetic analgesic, commonly used for analgesia of various severe pains, such as burns, scalds, postoperative pains, etc. It can also be used in cases of cardiogenic asthma and severe colic of internal organs. Pethidine mainly acts on the central nervous system, and also has some effects on cardiovascular and smooth muscle. Pethidine has fewer toxic side effects, nausea, vomiting and other discomforts are mild, and the inhibitory effect on the respiratory system is weaker, so respiratory difficulties usually do not occur. Pethidine is less addictive than morphine, but can be addictive with continuous use. The main side effects of pethidine are dizziness, headache, sweating, dry mouth, nausea, vomiting, etc. An overdose can lead to convulsions, hallucinations, dilated pupils, tachycardia, decreased blood pressure, respiratory depression, and coma. Children should not be used, and should not be combined with isoprinosine multiple times, there is a risk of respiratory depression, shock. Pethidine is contraindicated in patients with bronchial asthma, chronic obstructive pulmonary disease, intracranial hypertension from traumatic brain injury, cortical insufficiency, prostate hypertrophy, dysuria, hepatic insufficiency, pulmonary heart disease, hypothyroidism. Contraindicated in pregnant women, lactating women, newborns and infants, the elderly and children should be used with caution. Contraindicated for pain of unknown origin. Please use the drug under the guidance of a professional physician, do not self-medicate.