Drugs that can dilate the ureter class include anticholinergics such as atropine, alpha-blockers such as tamsulosin hydrochloride, calcium channel blockers such as nifedipine, and other drugs such as progesterone. 1. Anticholinergics: e.g. atropine, scopolamine, etc., which can relieve gastrointestinal smooth muscle and ureteral smooth muscle spasm. 2. α-blockers: for example, tamsulosin hydrochloride, doxazosin, etc. Current research has proved that this kind of drug has a better effect on relaxing the smooth muscle of the lower part of the ureter. 3. Calcium channel blockers: such as nifedipine, which is a commonly used drug in cardiovascular medicine, also has a better effect on relieving ureteral spasm. 4. Other: for example, resorcinol injection, progesterone and other drugs can also dilate the ureter and relieve spasm. When the ureteral stone is to be discharged, the ureter will be strongly contracted, spasm, when encountered with this situation can be used to dilate the ureteral drugs, can be effective in relieving the spasm of the ureter, relieve the patient’s pain. The above drugs should be used under the guidance of the doctor, do not use without authorization to avoid delay.