I prefer mirtazapine. It's both an appetite stimulant and works to control nausea, and you only have to administer it once every 3 days. Some cats may become very anxious and excitable while on it (called serotonin syndrome), but the remedy for that is to give cyproheptadine (Periactin).We were prescribed Periactin for two days last week it didn't seem to do much. But we only got two pills so maybe we weren't on it long enough. Are there any other kinds?