I have heard of people doing "heroic" doses of benzodiazepines in powder form. One accout is of someone ingesting 200-300 mgs of alprazolam powder in one sitting. Needless to say, the person simply blacked out, then when said person came too, the person started to experience withdrawal symptoms without being dependent to benzodiazepines. Of course, the person did not consume any other substance concurrently with said heroic dose, however, a week long panic attack with two seizures led the person to stay away from abusing benzodiazepines. Therefore, ingesting very large doses of benzodiazepines is folly, unless you are trying to avert a severely traumatic experinece. However, be prepared for the rebound, and make sure you do not take ANY depressants with it, otherwise there is a VERY high chance you could die from respiratory failure.