Anti-inflammatory drugs taken the night before the urine test may interfere with the results of the urine test. In this case, you need to fully inform your doctor what type of anti-inflammatory medication you have already taken, and clearly inform the oral dosage to make a comprehensive judgment. Oral anti-inflammatory drugs before the urine test, may inhibit the number of white blood cells in the urine, resulting in a false-negative white blood cell count, that is, the patient may have an infection, but because of the use of anti-inflammatory drugs after the white blood cells in the urine did not appear to have the phenomenon of elevation, which is manifested as normal. But in fact, the patient is in the infected situation, this situation is recommended to stop the drug and then review, or continue to take oral medication until the patient’s symptoms completely disappeared and then review. After oral anti-inflammatory drugs, the specific gravity of the urine, red blood cells in the urine and the sugar content in the urine has little effect, but mainly affects the value of the medicinal white blood cells. The effect on urinary bilirubin and urinary bilirubin is also small, waiting for the results to be reported, it is recommended to inform the doctor to make a comprehensive judgment, it is best to stop the drug and then leave the urine for laboratory testing is more accurate.