Oxybutynin 2.5 mg Tablet

Oxybutynin is an anticholinergic medication used to treat overactive bladder (OAB) by relaxing the bladder muscles, reducing urinary urgency, frequency, and incontinence. It may also be used to manage excessive sweating (hyperhidrosis).

Main Uses

• Overactive bladder (urinary urgency, frequency, and urge incontinence)

• Neurogenic bladder (especially in children and spinal cord injury patients)

• Hyperhidrosis (off-label use for excessive sweating)

Dosage & Administration

• Adults: 2.5 mg two to three times daily, may increase gradually based on tolerance

• Elderly: Start with 2.5 mg twice daily

• Children (5+ years): 2.5 mg twice daily, adjustable by weight and response

• Swallow whole with water, with or without food

Onset & Duration

• Begins working within 1 hour

• Duration of effect: up to 6–10 hours, depending on individual metabolism

Do Not Use If You Have:

• Urinary retention

• Gastric or bowel obstruction

• Uncontrolled narrow-angle glaucoma

• Severe ulcerative colitis

• Myasthenia gravis

• Known allergy to oxybutynin

Common Side Effects

• Dry mouth

• Constipation

• Blurred vision

• Drowsiness or dizziness

• Dry eyes or headache

Serious (Less Common):

• Difficulty urinating

• Confusion or hallucinations (especially in the elderly)

• Heat intolerance due to reduced sweating

• Rapid heartbeat or allergic reaction

Drug Interactions

• Enhanced side effects with other anticholinergics (e.g. diphenhydramine)

• May interact with drugs that affect CYP3A4 enzyme (e.g. ketoconazole)

• Alcohol and sedatives can increase dizziness or drowsiness

Special Caution

• Elderly patients may experience memory problems or confusion

• Avoid overheating; oxybutynin reduces the body’s ability to sweat

• Monitor for urinary retention or abdominal bloating

Storage

• Store at room temperature, away from light and moisture

• Keep out of reach of children