DS won't take Panadol either. Have you tried Dymadon? It is also just paracetamol, but has an orange flavour (similar to nurofen). Our DS quite likes it. Failing that, one way to get/keep it down is to get someone to help you so that straight after you inject it into his mouth, you squeeze his cheeks...that way he can't spit it out and has to swallow. Sounds mean, but it depends on how desperate you are and in how much pain he is (we had to do this when giving DS his reflux medication). Good luck.