Thanks for the kind words folks.
Yes he's fine now and co-incidentally, we're due to see his consultant tomorrow. Sadly, he's been having more fits than normal over the last few months so he's going to need a third medication (he's already on the highest dose of both the others he has to take).
It's all a bit worrying as it's almost a trial and error situation we're told so we're just praying that it works and he doesn't have any serious side effects.
Thankfully, he's a strong, happy lad and, despite all his problems, he brings us so much joy and we treasure every day with him.