The infant Panadol requires you to use a smaller dose than the childrens one. Work out what the recommended dose is in mls/kg and titrate to your DS's weight. At least you won't have to get so much in, 9mls is a lot!!

My DS vomits on contact with Panadol and can't have ibuprofen so I use the suppositories for him. It's easy, but make sure you use a tiny bit of KY or a similar lube with them!