I have been taking Valium for about 30 yrs now. I started it whan I was going thru some very stressful times. On a normal day I take probably a total of 5mg a day, but if I'm under a lot of stress I do need more. I'm sure my system has become ammuned to it over the years causing me to need more if I'm really stressed. But I can honestly say I think it has saved my life on many occasions!!!! As far as taking it for sedation for major work, not knowing what it is, I would think you would be given something with an IV which could be valium and demerol. If you just want it to relax you, I'm sure a pill would be of some help!!!