You need to find your sweet-spot for redosing. I tried for years, and still ended up passing out. It tends to make you get a bit enthusiastic with chasing a high, after a bit. I'd say take an initial dose, then half of that dose, about an hour or two after. After that, keep it to half original doses, every two hours. Stimulants will keep you awake, but only slightly over a knock-out dose. You can be on meth and pass out from a slightly too strong dose of G. You will pass out, at some point, if you're trying to find your sweet-spot, but it's not a nasty experience. Just be indoors and with people who know what's going on. People have woke up in A&E, with a tube down their throat, just because the people they were with didn't know that G makes you appear unconscious. I'm told it's quite frightening to watch me on G. Be careful, because it's insidious shit.