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(phenazopyridine HCl) Tablets, USP


Pyridium® (phenazopyridine hydrochloride) is chemically designated 2,6-Pyridinediamine, 3-(phenylazo), monohydrochloride. It is a urinary tract analgesic agent for oral administration. Phenazopyridine Hydrochloride tablets contain 100 mg or 200 mg Phenazopyridine Hydrochloride. Also contains lactose hydrous, sodium starch glycolate, corn starch, hydrogenated vegetable oil, silicon dioxide, magnesium stearate, sugar, gelatin, FD&C red #40 aluminum lake, titanium dioxide, FD&C blue #2 aluminum lake, povidone, sodium benzoate, carnauba wax and white wax.

Pyridium® (Phenazopyridine Hydrochloride) structural formula illustration

C11H11N5 • HCl                                         M.W. 249.70

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...

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What are the precautions when taking phenazopyridine (Pyridium)?

Before taking phenazopyridine, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: kidney disease, liver disease, blood disorders (e.g., G6PD deficiency, hemolytic anemia).

Before using this medication, tell your doctor or pharmacist your medical history.

This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic...

Read All Potential Precautions of Pyridium »

Last reviewed on RxList: 8/22/2007
This monograph has been modified to include the generic and brand name in many instances.

Pyridium - User Reviews

Pyridium User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Pyridium sorted by most helpful. Patient Discussions FAQs

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

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