Taking diclofenac sodium for three days as prescribed by your doctor will not usually harm your kidneys. Diclofenac sodium is a non-steroidal anti-inflammatory drug, most of the drug is metabolized by the kidneys in the form of urine, and the remaining part is excreted in the feces as a metabolite through bile. It is clinically used to relieve rheumatoid arthritis, osteoarthritis and other chronic arthritis joint swelling and pain symptoms; all kinds of soft-tissue rheumatic pain, such as shoulder pain and post-exercise injurious pain, etc.; acute mild to moderate pain, such as surgery, trauma, post-strain pain, primary menstrual cramps, dental pain, headache and so on. Its common adverse drug reactions are headache, dizziness, nausea, vomiting, diarrhea, dyspepsia, etc. Rarely, there are acute renal failure, nephrotic syndrome, renal papillary necrosis and other renal diseases. It is contraindicated in patients who are allergic to the drug and patients with hepatic or renal failure, and in patients with active peptic ulcers or bleeding. Be careful to avoid combining with other non-steroidal anti-inflammatory drugs, minimize the time of use and the use of the dose, patients with renal injury need to monitor renal function during the use of the drug. Therefore, follow the doctor’s instructions, take the appropriate amount of three days of diclofenac sodium in addition to the occurrence of rare adverse drug reactions generally do not hurt the kidneys, but patients with renal failure is prohibited to use diclofenac sodium treatment, if necessary, regular monitoring of renal function. Diclofenac sodium should be used under the guidance of a physician, and it is recommended that patients who need to use diclofenac sodium for treatment go to the relevant departments of regular hospitals for detailed consultation.