Vibrating eyesight - At superior doses, the user's eyeballs may well start to spontaneously wiggle back and forth in a very speedy motion, causing the eyesight to become blurry and quickly outside of focus. This is a condition called nystagmus.Mephedrone. "Not for human usage. For complex use only. Purity: ninety nine+ %" Mephedrone is among a hug