What Is The Dosage Of Powergyl To Be Given To A Toddler While Suffering From Fever And Vomiting?

Hi My 3.5year son suffering from fever 2 days back after giving paracetamol fever has gone he also vomit once after giving emeset their is no fever and vomitng but day three he started loose motion geen colour with mewcous 4,5 time in little quantity. I am giving powergyl 5 ml and entrogerminaIs . Is it ok what? Will be the dose of powergyl he is 13•5 kg.