The pain relief time of dulcolax is relatively short, lasting up to 2 hours. Dulcolax, also known as pethidine hydrochloride, is a synthetic opioid receptor agonist with pain-relieving and sedative effects. Since the pain relief time of dulcolax can only last about 2 hours and is more harmful to human body, it is no longer used as a regular pain relief drug. Dulcolax injection into the blood is absorbed faster and reaches the peak too early, then it can lead to a faster drug action time, and the time when the drug effect reaches the peak comes early, and does not make the drug action time longer. The application of controlled slow-release formulations of morphine is now more recommended to maintain a longer analgesic effect. After the use of dulcolax, patients may experience mild vertigo, sweating, dry mouth, nausea, vomiting, tachycardia and upright hypotension as side effects, and in severe cases, bronchial asthma and cardiopulmonary insufficiency may be induced.