I haven't read this proposal, but if it's anything like the way the AF uses the drugs, the "go" pills are very rarely used. We treat them as "emergency use only" i.e...you're airborne in a single seat fighter, not near a base, and you can't stay awake. The "no-go" pills are used more, the idea being that if you use the ambien to get some decent sleep before the flight, you won't need the "go" pills in flight.

Personally, the ambien seems to work pretty good to me, although it loses it's effectiveness if you take it more than a few days in a row...at least it does for me. I very rarely used the go pills and never liked them. Their use was very controlled, and you didn't get them unless you met some very specific circumstances.

All that being said...I sure don't want to see airlines using drugs as a way to do the job with less guys.