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Withdrawal: Adrenochrome addiction is permanent. Each day that the user goes without adrenochrome, he has a 5% cumulative chance of snapping and cutting off the nearest person’s head to get at their adrenal gland. He will, in desperation, even try cutting off a demi-human or humanoid head - but the adrenochrome from such sources is of poor quality, and will not satisfy the addict’s cravings.