Oh my, Arkroyal, is'nt ignorance and exaggeration bliss!
Temazepam, just 10mg, has an effective life of six hours and can give you a good night's (day's) sleep out of routine hours so that you are refreshed for the second flight. After 12 hours it's all out of the bloodstream even if your half pint ain't! Surely that's better than flogging around "fatigued" and all shot to pieces as you guys claim to be? Sounds like I'd rather be flying with someone on my regime than yours!
(and I can claim 30 years with no accidents or incidents...)