How long to take Perindopril for purpura nephritis cannot be generalized. It should be taken according to the patient’s specific condition as well as personal constitution, and the medication should be taken in strict compliance with the doctor’s instructions. Perindopril is a long-acting angiotensin-converting enzyme inhibitor commonly used as tablets, mainly used in the treatment of hypertension and congestive heart failure and other diseases, and in renal diseases, it is mostly used to control blood pressure and reduce proteinuria. Its adverse reactions include possible headache, dizziness, fatigue, stomach pain, anorexia, nausea, abdominal pain, taste disorders and other adverse reactions, patients need to stop taking the drug immediately, allergic to the drug, 4 to 9 months of pregnancy, lactating women, hyperkalemia, and in the first trimester of pregnancy is prohibited. It is recommended that patients use the drug under the guidance of the doctor and in strict compliance with the doctor’s instructions, do not blindly use the drug or change the dose of the drug without authorization, and regularly check the blood potassium and creatinine to avoid adverse effects on the body.