What are the possible side effects of a fentanyl transdermal skin patch?
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. You may report side effects to FDA at 1-800-FDA-1088. What is the most important information I should know about a f
