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What are the side effects of fentanyl iontophoretic transdermal system?

While using fentanyl iontophoretic transdermal, you may experience a wide range of common side effects. You may feel nervous, depressed or confused or have trouble remembering things. You may see things or hear voices that aren't really there. You may feel weak, dizzy or have slow shallow breathing, tingling or numbness in your hands or feet. You may have episodes of insomnia, headaches or dry mouth or start hiccupping uncontrollably. You may experience stomach upset, including indigestion, gas, diarrhea, constipation, nausea, vomiting or loss of appetite. You may have trouble urinating or experience pain in your back. You may feel itchy or sweaty or develop itching, redness or swelling around the spot where you apply the patch. If these side effects don't go away or get worse, contact your doctor. Also, let your doctor know right away if you experience any of the following side effects, as they may be signs of a medical emergency: a fast heartbeat or chest pain; developing a rash all over your body; experiencing seizures; or coughing up blood.

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Important: This content reflects information from various individuals and organizations and may offer alternative or opposing points of view. It should not be used for medical advice, diagnosis or treatment. As always, you should consult with your healthcare provider about your specific health needs.