question: I AM YOUNG AT 74 YEARS AND I HAVE BEEN TAKING SLEEPING TABLETS FROM 1980 AFTR MY HEART ATTACK. NOW I AM TAKING ZOLFRESH FOR THE PAST 13 YEARS. I COULD NOT STOP THIS SINCE I AM TAKING THIS WITH LIBOTRIP 10 MG EVERYDAY WITHTOUT WHICH I CANNOT SLEEP KINDLY GUIDE ME HOW TO WITHDRAW AND THE AFTER EFFECTS