Check with your doctor if symptoms such as bloody urine, difficult or painful urination, frequent urge to urinate, or sudden decrease in the amount of urine appear or become worse while you are taking this medicine .
Phenazopyridine causes the urine to turn reddish orange . This is to be expected while you are using it. This effect is harmless and will go away after you stop taking the medicine. Also, the medicine may stain clothing.
For patients who wear soft contact lenses:
It is best not to wear soft contact lenses while being treated with this medicine. Phenazopyridine may cause discoloration or staining of contact lenses. It may not be possible to remove the stain.
For diabetic patients:
This medicine may cause false test results with urine sugar tests and urine ketone tests. If you have any questions about this, check with your health care professional, especially if your diabetes is not well controlled.
Before you have any medical tests, tell the person in charge that you are taking this medicine. The results of some tests may be affected by this medicine.