Concept: Classification of analgesics
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Step 1: Understanding analgesics
Analgesics are drugs used to relieve pain.
They are classified into:
• Non-narcotic analgesics (e.g., aspirin, paracetamol)
• Narcotic analgesics (opioids)
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Step 2: Narcotic analgesics
These:
• Act on central nervous system
• Can cause addiction
• Derived from opium
Examples:
• Morphine
• Codeine
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Step 3: Analyze options
• Aspirin → non-narcotic ❌
• Paracetamol → non-narcotic ❌
• Codeine → narcotic analgesic ✅
• Zantac → antacid ❌
• Cimetidine → anti-ulcer drug ❌
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Final Answer:
\[
\boxed{\text{Codeine}}
\]