I'm not sure why you're afraid to ask your psych nurse, but if you are afraid of coming across as a druggie, don't be! Most PRN's for breakthrough psychosis are APs and such, with benzos occasionally used to treat secondary symptoms (such as anxiety and restlessness stemming from paranoia). But if you're afraid that she is going to do something you might not like, why not have a conversation with her? For example, "I occasionally have breakthrough psychosis, but I really like my meds as they are and I don't want to be prescribed something that will cause X, Y, and Z side effects."