Clonidine (Catapres) is most effective for which symptom of opioid withdrawal?

• A. Anxiety
• B. Muscle aches
• C. Restlessness
• D. Diarrhea

Answer: (D)

Clonidine is most effective in managing symptoms such as autonomic instability during opioid withdrawal, which includes diarrhea. Opioid withdrawal can lead to increased sympathetic nervous system activity, causing symptoms like watering diarrhea, nausea, and vomiting. Clonidine, as an alpha-2 adrenergic agonist, works by inhibiting the release of norepinephrine, which thereby reduces this sympathetic overactivity.

While clonidine can also address some anxiety and restlessness, its primary clinical utility in opioid withdrawal is in alleviating gastrointestinal symptoms and providing overall stabilization of the autonomic nervous system. This makes it particularly valuable in reducing episodes of diarrhea associated with opioid withdrawal.