Possible Clues:

• "Medicine" used in tests
• Fake med
• Put old boy on back — it does nothing to cure him
• Innocuous medication put down next to retired old boy
• Spot a personal problem that makes you feel better in your head
• Lay brother having run away in evening 19dn
• Measure purely to calm or humour another
• Medically ineffectual treatment
• Control in a clinical study
• Ineffectual treatment of rank bad smell