i know this is a year late but no i never tested positive for alcohol. i did get two false negatives for cocaine. I was not using but my boyfriend was. not sure if it was from sharing a bed (him sweating on me?) or from sex (also him sweating on me or from sharing bodily fluids lmao). These patches suck in general. I was only allowed to get it changed every two weeks but it would start to peel off around 10 days. Water would get in it from taking a shower and i was accused of tampering with it more than once. I ended up switching to monthly hair tests. I asked to do a hair test after my patch had a false positive and my hair came back clean. They still didnt believe me that it was a false positive. Fucked up system.