I have insomnia and I over the counter sleeping pills. I started taking them and developed a tolerance...I'd end up taking 10 at a time just to fall asleep. Sometimes after that many I didn't...I'd still be awake. Now it's a variation. Some nights I'll take 4, some nights 1. I'll go days without it, then take some more. But overall I'm not letting myself develop a tolerance to them. But here's the question...now only taking 1 pill gets me high (not really high but it's a different feeling). It used to take so many more, even when I first started taking them. It seems like I'm sooooo much more sensitive to what's in them. So is that possible? This is like reverse tolerance. I'm on them right now so I hope this makes sense.