Mirfentanil

Mirfentanil

Mirfentanil is a potent opioid analgesic drug that is used in the management of severe pain. It is a synthetic opioid that is structurally related to fentanyl, but is more potent and has a faster onset of action.

Pharmacology

Mirfentanil acts primarily on the mu-opioid receptor, which is involved in the perception of pain. It binds to these receptors in the brain and spinal cord, blocking the transmission of pain signals. This results in a decrease in the perception of pain.

Mirfentanil is metabolized in the liver by the cytochrome P450 enzyme system, and its metabolites are excreted in the urine. The half-life of mirfentanil is approximately 2-3 hours, which is shorter than that of fentanyl.

Clinical Use

Mirfentanil is used in the management of severe pain, particularly in situations where rapid onset of pain relief is required. It is often used in the perioperative setting, for the treatment of breakthrough pain in cancer patients, and in palliative care.

Due to its potency and rapid onset of action, mirfentanil should be used with caution and under the supervision of a healthcare professional. It has a high potential for abuse and dependence, and its use is associated with serious side effects, including respiratory depression, hypotension, and sedation.

Side Effects

The most common side effects of mirfentanil include nausea, vomiting, constipation, and drowsiness. More serious side effects include respiratory depression, hypotension, and sedation.

Due to the risk of respiratory depression, mirfentanil should be used with caution in patients with underlying respiratory conditions. Similarly, it should be used with caution in patients with low blood pressure or those who are at risk of sedation.

See Also

• Opioid
• Fentanyl
• Mu-opioid receptor
• Cytochrome P450