Possible Clues:

• Mood-lightening drug
• Uplifting drug
• Prozac or Zoloft
• What lifts iron worker chasing a new surge
• Drug from doctor finally ends a patient's treatment
• Frantically disperse insect above and below � that should make you feel better
• Drug, I d say, not unknown among workers
• Weight-lifting drug?
• What might sort out tenant's despair
• Damned tired en passant, this should give one a lift