Will Pyridium Affect a Urine Test?

Do not use phenazopyridine for longer than 2 days unless your doctor has told you to. This medication can cause unusual results with urine tests.

Does phenazopyridine interfere with urinalysis?

This medicine may cause false test results with urine sugar tests and urine ketone tests.

Can you give a urine sample while taking AZO?

Phenazopyridine can interfere with certain laboratory tests (including urine tests for kidney function, bilirubin, and sugar levels), possibly causing false test results. Home urine tests (including diabetic tests) may be affected. Make sure laboratory personnel and all your doctors know you use this drug.