Other Information: Product comes in individual sealed pouches, do not use if pouch is torn or opened. Store between 68 to 77 degrees F (20 to 25 degrees C). Protect from moisture and humidity. Do not store outside the sealed pouch. Misc: Oxybutynin transdermal system 3.9 mg/day. Relief from overactive bladder. 1 patch treats for 4 days/4 nights. 16-day supply.