I've used both Calpol and Panadol (being a Brit living in Australia) and panadol is way worse, it's quite bitter. No wonder my bub hated it! Calpol is much nicer taste IMO but you're right, to a bub who only has milk anything will taste weird and so different! I've had success here with dymadon like others have said. Pharmacists seem to recommend it if you ask for one that's nicer tasting but not sure about in the UK as my DS always took Calpol. Try the Boots own brand maybe, it's all got the same stuff in it afterall!