Related Clues:

• Drowsiness-inducing drug
• Stupefying thing
• Ran up to bed with chopped ice — that fights pain
• Codeine, e.g
• Drug causing numbness and drowsiness
• Old head has to take one sort of drug
• Northern ocean about freezing point - this will induce numbness
• Does it ease pain of operation, I worried?
• Poppy-based drug
• At work I took drug
• Sleep-inducing oils initially detected in Northern ocean
• Stupor-inducing drug
• Number freezing, gulping oxygen on Nepalese peak
• On Arctic manoeuvres, drug supplied
• After work, I partook of heroin, perhaps