[peteretep]

I used to take substantial (up to 60mg in a ten hour period) and well-tolerated (very little sleepiness, no euphoria) doses of valium when flying. While I never took it when not flying, I had (and to some degree still have) an intrusive desire to be taking it, especially after recent usage.

I took it to fly for maybe 4 years, with an increasing dosage (I started at 2mg), and flew about once every 2-3 months, and had a couple of noticeable comedown periods. I don't know if that fits your "addicted to valium" definition, but I didn't have any noticeable "more awake" feelings in the 2-3 month dry periods.

(I recently switched to beta-blockers, which are neither addictive nor habit-forming, for flying, with a greatly decreased valium dose, and it's going great. Would highly recommend trying it for anyone uncomfortable with the direction their benzo tolerance is travelling, and with appropriate symptoms)