Just to put you expections in the right place, magnesium does help me, but during the actual taper, the help was small. Everything thing is wash out by the benzo withdrawal anxiety induced insomnia.
I have been off benzos for 3 years and the magnesium is real effective now.
I take TWO-HOURS BEFORE BED, two tablets of Swanson Magnesium Taurate which is a total of 200mg Magnesium (48%). Also, I have found, taking my Irbesartan at bed or better yet, when wake up in the middle of the night, to be very effective in returning myself to bed.