My son, who is now 20, was just diagnosed with Dent's. He was on growth hormone from ages 10 to about 14. He is now 5 foot 9 and we are thrilled with that. One side effect, however, was he was diagnosed with renal rickets, so be aware of that going in. I had to fight really hard with the insurance company about covering the hormones, however, so be ready for a fight.