A 27 years old man has been vomiting and having diarrhea and visiting the toilet 5 times a day for 2 days. he has been taking Gatorade 1 litre a day for within this same 2 days. When he got to the hospital, prior to admission , they discovered sclera (related to eye disorder)islet ... what are the possible diagnosis of this patient? What are the pharmacological therapy to help? What will you advise the patient to do ?