Related Clues:
- Morphine or codeine, e.g.
- Religion, to Marx
- Religion, to the masses, per Marx
- Deadening agent
- 'Tropic Thunder' director and co-star
- What might be a knockout?
- A sedative drug
- A poet I become on this drug
- It induces sleep
- Preparation made from poppy derivative
- A sleep-inducing drug
- A drug to induce sleep
- A sleep-inducing drug (6)
- A narcotic drug
- Trade-named tranquillizer