Progesterone injection refers to progesterone injection. Progesterone injections and capsules belong to different forms of progesterone, treatment and medication should follow the principle of individualization, there is no so-called “which effect is good”, follow the doctor’s instructions to choose the appropriate and effective form of medication is good. Progesterone injections and capsules are progestin drugs, suitable for preeclampsia and habitual abortion, premenstrual tension syndrome, anovulatory dysmenorrhea and anovulatory amenorrhea, and estrogen can also be used in combination for the treatment of menopausal syndrome. Adverse reactions such as nausea, headache, breast swelling, and abnormal liver function may occur with the use of both progesterone injection and capsules. In addition, progesterone injections can cause rash, itching, and pain at the injection site, which may result in the formation of localized hard nodules and, in severe cases, localized sterile abscesses. Patients who are allergic to progesterone, patients with unexplained vaginal bleeding, breast tumors or genital tumors need to be prohibited from using these two drugs. Progesterone is metabolized through the liver, therefore, patients with severe liver damage need to be prohibited from using progesterone to avoid worsening symptoms. Progesterone injections and capsules are prescription drugs, patients should follow the doctor’s instructions to standardize the use of medication, not blindly self-medication.