Hemostasis is generally referred to as phenolsulfonamide, which is an injectable agent that works to stop bleeding and reduce bleeding induced by surgery or other factors. Phenosulfanilamide has the effects of vasoconstriction, decreasing capillary permeability, and enhancing platelet aggregation and adhesion. Therefore, it can shorten the clotting time and reduce bleeding. Phenosulfanilamide injection is mainly used for the treatment of thrombocytopenic purpura, cerebral hemorrhage, gastrointestinal hemorrhage, fundal hemorrhage, gingival hemorrhage, rhinorrhea, etc., as well as bleeding caused by other vascular factors. However, there are some people who experience nausea, headache and rash after using Phenosulfanilamide Injection; low blood pressure as well as the possibility of anaphylactic shock can also occur after intravenous injection. These side effects should be discontinued as soon as they occur. Meanwhile, most of the metabolism of Phenosulfanilamide is excreted through the kidneys, so patients with renal disease need to use the drug with caution. Phenosulfanilamide injection belongs to the prescription drugs, must strictly follow the doctor’s instructions to use drugs, individuals can not unauthorized use of drugs, so as to avoid medication is not appropriate, damage to the body.