How long does it take to withdraw from Elavil? I have taken it for 26 years for sleep and it has been very effective. I have to stop taking it because of my age(75) and problems with falling. I started at 150mg and decreased by 25mg weekly. When I hit 50mg I started having problems. When I was down to zero mg, I could no longer sleep. I am now taking 75mg and doing fine, but I still must finish withdrawing. How rapidly should I do this.