Hello hong! Reading your test l feel sorry for you.i have the same experience with you.when my daughter XiaoMing began treatment.the doctor give her med dose according to (0.035*weight(kg)+0.1)*20mg,we give her about 20days 5mg,then the result is sodium-140,potassim-5.9,chloride-97,cortisol<1dnmol/l urea(pin yin in chinses is gao ton?)is5. doctor reduce to 3mg/day.XiaoMing begain vomit several days.6times my husband ask doctor if add med dose 6tim,she refused,even baby lung illness.we asked why? she refused answer.i thought it day and night.i belive that so do you. i read books all i can borrow .i only give you my feeling perhaps not true:1)vomiting should be avoild, it means kid lack it.2)if same dose you can give 4 times instead 3 times.3)if vomiting not on control,there 3 dates be tried 12.5mg ,15mg,18mg 0.3964 0.5378 M2= height(cm) X wei(kg) X 0.024265 4)there are usful data from board i gained: (*important)boy 31inchs(78.7cm),24.8p(11.25kg) m2=0.6 dose=9mg 14month (from Chris D this give me great help) girl(19 mons)12mg 5)my baby seem to fit 15-18mg,girl pefer to 15mg . i'm now very very busy.i can't write more.i know you feeling.if you have time you can read cah parent handle on board lift .that metion med dose. every metioned i can offer you relying on. i already email you.i don't sure you can receive.i used it first time.thank you very much. my baby med already over dose that doctor offered but she seem grow not stunt.it is very risk but i havn't way to change this condition.wish good luck to you,please back you how to handle it. Yong Yan.