The ingredient list for meth is so absurd that it almost seems far fetched: drain cleaner, gasoline, Freon, acetone, battery acid, ammonia, and paint thinner cover just part of the list. After all, who in their right mind would ever have thought to create a cocktail of such undesirable substances and put it into their body? The answer is someone who is not in his or her right mind. Methamphetamines actually eat away at the brain tissue, resulting in behavior very similar to those suffering from schizophrenia and literally leaving gaping holes that are visible in a brain scan.