YES I TAKE LDN, AND IT DOES WORK FOR ME, I PURCHASE IT FROM xx xxx xxxxxxxx WHO ALSO HAS MS WHO GIVES GREAT VITAMIN ADVICE AS A BONUS, IT IS A CHEAP DRUG MADE TO TREAT HEROIN ADDICTION AT A MUCH HIGHER DOSE, OUR DOSE GOES UP TO 4.5 WHILE HEROIN IS 50 PLUS I THINK HIS NUMBER IS xxxxxxxxxx. HOPE IT ...