Fentanyl is commonly used to treat Anesthesia, Dry Cough, Moderate To Severe Pain, Opioid Dependence, Severe Chronic Pain

Fentanyl functions as a potent agonist of opioid receptors in the central nervous system, producing analgesia by altering the perception of and response to pain signals. It primarily acts on mu-opioid receptors, leading to inhibition of neurotransmitter release, resulting in pain relief and sedation.

Common side effects may include nausea, vomiting, constipation, drowsiness, and respiratory depression. Serious side effects can include slowed heart rate, low blood pressure, and potentially fatal respiratory depression.