My son is 5 years old and a severe salt waster. 48 lbs 46" Tall 2.5mg/2.5mg/3.75mg = 8.75mg total His last OHP level was approx. 147 (perfect according to doctors) There doesn't seem to be anything uniform at all. Should there be a 9 month old taking more cortef than a 5 year old? Are they all salt wasters? An 8 year old is taking more than twice the dose of some other 8 and 9 year olds. Am I reading this correctly? Can anybody else explain this to me. I must be missing something. How many have just made the switch, and what is their OHP levels? Bone age? Pardon my paranoia but I believe I have just cause. P.S. LynnG - What is your son's height?