He's just coming out of the worst cold I've ever known him to have. He had a temperature for a week and was miserable, had nasty sinus pain and a sore throat for a good two weeks. He seems to be out of it now, but he's so lack lustre. He's always tired, but I can never get him to take a nap. His behaviour is really affected by how tired he is and how run down he is. Thankfully his appetite has returned, he didn't eat for two weeks, but it's fairly limited anyway.
Whenever I'm recovering from a nasty cold or such like I take a Seven Seas vitamin tonic or some Pharmaton which seems to really help and perk me up again. Is there something similar for children? He's 3.6 btw.