So SWIM is interested in infusing alcohol (probably vodka) with diphenhydramine (probably benadryls). Has anyone ever done this? SWIM is mostly interested in correct dosage, so as not to kill anyone. SWIM has 25mg diphenhydramine pills. These presumably have some coating and filler. If they were to be crushed, how many (approximately), do you think should be infused in a 500ml bottle of vodka to yield approximately the equivalent of a 25mg oral (pill) dose per 20ml shot?I assume "infusion" time is relevant to a point, but that after a few days of infrequent swishing, the job would be done.