Is it bad that me and my sister share meds sometimes? Like if one of us runs out of something we help each other out. Except for seroquel, she's not on that. Also she is on Xanax instead of Valium. Like if I forget my meds at home, she'll give me a lithium and a Xanax. Is it bad to be switching it up sometimes? Just hope I'm not breaking some sort of law or something bad.