Phenazopyridine — Urinary tract analgesic. Study the mechanism, listed uses and warnings from the US label on one sourced card.
Generic name
Phenazopyridine
Class
Urinary tract analgesic
Mechanism
Excreted in urine, where it exerts a topical analgesic effect on urinary tract mucosa; exact mechanism unknown.
Used for
Lower urinary tract pain, burning, urgency
Common side effects
Headache; Nausea; Diarrhea; Rash; Discoloration
Warnings
Renal insufficiency (contraindicated); Severe liver disease / hepatitis (contraindicated); Symptom relief does not replace diagnosis or treatment of the cause, including antimicrobial treatment when needed.; Use for a urinary tract infection should not exceed two days.
Brand questions use only name pairings verified against the linked product source. Unverified pairings are withheld from these questions; the other study content remains available.
Label date: 20260821 · For learning, not clinical decisions. US label and brand information; always consult the current source.
Source snapshot checked: 2026-10-21. The source document and selected fields were compared. The complete card has not had an independent clinical review.
Mechanism: Relaxes bladder smooth muscle by a direct antispasmodic effect and by inhibiting the muscarinic action of acetylcholine.
On both cards: Common side effects — Headache; Diarrhea
Only on the Oxybutynin card: Used for — Overactive bladder with urge urinary incontinence, urgency and frequency; Symptoms of detrusor overactivity associated with a neurological condition in children aged 6 or older · Common side effects — Dry mouth; Constipation; Somnolence · Warnings — Urinary retention, gastric retention or severe decreased gastrointestinal motility; uncontrolled narrow-angle glaucoma are contraindications; Angioedema; Anticholinergic CNS effects
An item counts as shared only when both cards use the same wording. If a card does not list an item, that is not a statement that the effect never occurs.
Capsera