Naloxegol

Naloxegol is a prescription medicine that belongs to a group of medicines called peripherally-acting opioid receptor antagonists. It is used to treat opioid-induced constipation in adults with chronic non-cancer pain. Naloxegol works by blocking opioid receptors in the gut that cause constipation. It helps to restore normal bowel movement and improve bowel symptoms, such as straining, hard stools, and feeling of incomplete evacuation.

Naloxegol is a medication specifically designed to address a common side effect of opioid pain relievers: constipation. Here's a closer look at its function and mechanism of action:

• Purpose: Naloxegol treats opioid-induced constipation (OIC) in adults with chronic, non-cancer pain who are taking opioid medications.
• Mechanism of Action: It works uniquely by being a peripherally acting opioid antagonist. This means it blocks the effects of opioids only in the gut, not in the brain. Here's the breakdown:
  • Opioid Effect on Gut: Opioid medications can slow down the movement of stool in the intestines, leading to constipation.
  • Naloxegol's Targeted Action: Naloxegol is designed to be large enough that it cannot pass through the blood-brain barrier. Therefore, it only interacts with opioid receptors in the intestines. By blocking these receptors, naloxegol helps to restore normal gut function and ease constipation.
• Advantages: This targeted approach offers a significant benefit:
  • Maintains Pain Relief: Because naloxegol doesn't affect the brain, it doesn't interfere with the pain-relieving effects of opioid medications.

Key Points to Remember:

• Naloxegol is not a general laxative and should only be used under a doctor's supervision for opioid-induced constipation.
• It comes in tablet form and is typically taken once daily.
• While generally well-tolerated, naloxegol can cause side effects like diarrhea, nausea, abdominal pain, and headache.