• Basic Info
• Top Questions
• Clinical Info
• Interactions

How should I take phenazopyridine?

Take phenazopyridine exactly as it was prescribed for you. Do not take the medication in larger amounts, or take it for longer than recommended by your doctor. Follow the directions on your prescription label.

Take this medicine with a full glass of water. To avoid stomach upset, take phenazopyridine with food.

Phenazopyridine will most likely darken the color of your urine to an orange or red color. This is a normal effect and is not cause for alarm unless you have other symptoms such as pale or yellowed skin, fever, stomach pain, nausea, and vomiting. Darkened urine may also cause stains to your underwear, which may or may not be removed by laundering.

Phenazopyridine can also permanently stain soft contact lenses, and you should not wear them while taking this medicine.

Do not use phenazopyridine for longer than 2 days unless your doctor has told you to.

This medication can cause you to have false results with glucose or ketone urine tests. Tell any doctor who treats you that you are using phenazopyridine.

Store this medication at room temperature away from moisture and heat.

What happens if I miss a dose?

Take the missed dose as soon as you remember. If it is almost time for your next dose, skip the missed dose and take the medicine at your next regularly scheduled time. Do not take extra medicine to make up the missed dose.

What happens if I overdose?

Seek emergency medical attention if you think you have used too much of this medicine.

Overdose symptoms may include yellowed skin, fever, confusion, weakness, urinating less than usual, nausea, vomiting, swelling, numbness, or blue-colored skin.

What should I avoid while taking phenazopyridine?

Avoid wearing soft contact lenses while you are taking phenazopyridine. The medication can cause permanent staining of soft contact lenses.

What are the possible side effects of phenazopyridine?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat. Stop using phenazopyridine and call your doctor at once if you have any of these serious side effects:

• pale skin, fever, confusion or weakness;

• jaundice (yellowing of your skin or eyes);

• urinating less than usual or not at all;

• drowsiness, confusion, mood changes, increased thirst, loss of appetite, nausea and vomiting;

• swelling, weight gain, feeling short of breath; or

• blue or purple coloring in your skin.

Less serious side effects may include:

• headache;

• dizziness;

• stomach pain, upset stomach; or

• skin itching.

This is not a complete list of side effects and others may occur. Tell your doctor about any unusual or bothersome side effect.

What other drugs will affect phenazopyridine?

There may be other drugs that can interact with phenazopyridine. Tell your doctor about all the prescription and over-the-counter medications you use. This includes vitamins, minerals, herbal products, and drugs prescribed by other doctors. Do not start using a new medication without telling your doctor.

Where can I get more information?

Your pharmacist can provide more information about phenazopyridine.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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