First, it's dangerous to give up psychotropics without a doctor's plan of attack. People that commit suicide and who take them are often found to be going cold-turkey when the incident occurs.

Second, I've found that when I've lived where pot is legal, that it has a similar effect for me. When I was really tightly wound at the end of the day, it helped me relax, shift my perspective and I could usually fall asleep in minutes.