MaryLaura your poor daughter! Above is a link on Fludrocortisone which someone posted awhile back. It sounds as if the urine is too strong, especially if fluid increase etc helps. Do you think it could be something to do with too much fludro and salt, but I guess then she would have other symptoms, high b/p etc. Please let us know how she gets on, and hope that she feels better soon. Good luck