Oxybutynin Extended Release (ER)

How should you use this medication?
Take this medication by mouth. Swallow the tablets whole with a drink of water. Follow the directions on the prescription label. Do not crush, break, or chew. Take your medication at regular intervals. Do not take your medication more often than directed. A special MedGuide will be given to you by the pharmacist with each prescription and refill. Be sure to read this information carefully each time. Talk to your care team about the use of this medication in children. While this medication may be prescribed for children as young as 5 years for selected conditions, precautions do apply.

What are the possible side effects of this medicine?
Side effects that you should report to your care team as soon as possible:

Allergic reactions-skin rash, itching, hives, swelling of the face, lips, tongue, or throat
Kidney injury-decrease in the amount of urine, swelling of the ankles, hands, or feet
Low magnesium level-muscle pain or cramps, unusual weakness or fatigue, fast or irregular heartbeat, tremors
Low vitamin B12 level-pain, tingling, or numbness in the hands or feet, muscle weakness, dizziness, confusion, difficulty concentrating
Rash on the cheeks or ams that gets worse in the sun
Severe diarrhea, fever
Unusual bruising or bleeding Side effects that usually do not require medical attention (report to your care team if they continue or are bothersome):
Diarrhea
Headache
Vomiting

What may interact with this medicine?
Our pharmacists will check to see if this medication will cause any interactions with the information in your profile.
Do not take this medication with any of the following:

Atazanavir
Nelfinavir This medication may also interact with the following:
Ampicillin
Delavirdine
Erlotinib
Iron salts
Medications for fungal infections like ketoconazole, itraconazole and voriconazole
Methotrexate
Mycophenolate mofetil
Warfarin