I agree with Kathryn. My son who is 12 months old recently had his florinef decreased from .2 to .1 then back up to .15. I think it sounds reasonable to increase it to .2 but like Kathryn said check his blood pressure soon and make sure it doesn't become elevated. (My son was also EXTREMELY cranky when he had high blood pressure--pretty much the first 6 months of his life!)