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One thing I've noticed is 6-APB often gives me quite severe memory problems, particularly in combination with other drugs, and I forgot to stay properly hydrated throughout the night, only consuming about 0.4L when I had consumed three substances that contribute to dehydration (6-APB, Alcohol, Amphetamine). My friend drank even less on the same combination, and the only times he drank at all were when I remembered and reminded him. So I'd recommend having a friend remind you to drink if you're out and about, and an alarm or reminder of some kind if you're at home.