What are the possible side effects of Duragesic-75 (Fentanyl)?
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. Remove the skin patch and call your doctor at once if you have any of these serious side effects: weak, shallow breathing severe weakness, feeling light-headed or fainting cold, clammy skin; or pale skin, easy bruising or bleeding Less serious side effects may include: nausea, vomiting, stomach pain, constipation, gas dizziness, drowsiness, anxiety, sleep problems (insomnia) muscle stiffness, back pain itching, blistering, redness, or swelling where the patch was worn; or increased sweating, urinating less than usual This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.