Big ol' ymmv on this one. I've run years on end on a 50/5 stack, 50mg 15 minutes after waking, 5 days a week. Energy levels on the weekend could be low but ha

Big ol' ymmv on this one. I've run years on end on a 50/5 stack, 50mg 15 minutes after waking, 5 days a week. Energy levels on the weekend could be low but hard to separate that from working hard all week. It was sustainable. Now if you get a real streak going, the two days after discontinuing you'll feel like an idiot. Hyperbolic tapering is a reliable solution to this: go 200/100/50/0 instead of 200/0, give your brain a fighting chance.