I was dosing 1.5ml of GBL once every hour and 3ml twice in the night for sleep for over a month and found that i didnt have to raise the dosage at all during this period. Before this month of 24/7 dosing, i had been using it very regularly (but not 24/7) for a few weeks, at exactly the same dose. Without a doubt my favourite drug, but when you have to start using it to get to sleep, you know that you are easily slipping into addiction, which is very obviously what happened to me. Although saying this, each and every dose, even all the way up to my very last one was always a great pleasure. And i dont mean that as in; pleasure from the relief of withdrawals because i never left it enough time between doses to experience any.