Lamictal does that to me. With your meds, it could be any or all of the above (and that's a LOT of Prozac you're on!!). Be sure to tell your doctor, and in the meantime you may want to try lukewarm oatmeal baths (Aveeno makes some good products) but avoid daily showers/baths because they dry out the skin, particularly if you're older. Also avoid using perfumed soaps, sprays, lotions etc. because they too are drying, and make sure you're hydrated---drink plenty of water throughout the day. Hopefully something will help.....itchiness is awful.