Has anyone ever experienced a short term memory loss? My daughter is taking Prozac, Risperidone, and Xanax (as needed - not on a daily basis). She went out and had a single beer and came home, woke up very early the next morning and can't remember the next evening from the time she drove to the restaurant until early this morning. She was not gone very long and I talked to her when she got home - she looked fine and was making food and speaking normally. This morning she can't remember any of it. Could this be caused by a drug interaction? She immediately thought of someone spiking her beer, but she didn't leave it and got it directly from the bartender. She's freaking out about it and thinks she's losing her mind. Is this something anyone has experienced? She is treated for depression, OCD and anxiety.