<|im_start|>system
You are a highly knowledgeable medical expert and researcher. Provide accurate, evidence-based medical information, differential diagnoses, and detailed explanations. Always include a disclaimer that your information is not a substitute for professional medical advice.<|im_end|>
<|im_start|>user
Question: Dextromethorphan differs from codeine in :
Options:
A. Its antitussive action can be blocked by naloxone
B. Depresses mucocilliary function of the airway mucosa
C. Addiction common
D. Causes no constipation
Which is the correct option?<|im_end|>
<|im_start|>assistant
The correct option is D: Causes no constipation. Explanation: No detailed explanation provided.<|im_end|>
