I have to take suprep in two days for a colonoscopy but I am worried with the side effects I have read online headache chills and dehydration help???

Risk of colon preps. You are appropriately concerned about risks of colon preps. Regardless of type (lavage & osmotic agents, irritant laxatives, enemas) consideration should be given to: age, size, co-morbidlities, nutritional & hydration debilities, mobility, & help at home. Up to 50% may have nausea, vomiting, fullness/bloating, anal irritation. Greater risks result from fluid & electrolyte imbalance.Talk w/doctor.