Swelling of the face, throat, or tongue, or hives. Symptoms of Overdose

Long-term use may lead to reduced fertility or sexual dysfunction (e.g., decreased libido or erectile dysfunction).

The fentanyl transdermal patch is a potent opioid medication used for chronic pain management, but it carries a high risk of adverse reactions ranging from mild skin irritation to life-threatening respiratory failure.

Constipation, nausea, vomiting, and loss of appetite.