Jim. Why the need to be (hypothetically) medicated ? I mean, you'd be able to crawl up on to the ceiling of that Boeing, and into an 'Iron Lung' looking contraption for a relaxing Snoooooze !!
The breaks allowed are like 1-3 hours in length depending upon which airline. That still leaves as much as 14 hours to not sleep and probably not have anything to do because the passengers are sleeping. No thank you. One of the reasons I like to fly #1 is because I can stay busy in F/C keeping the passengers satisfied.