Both mine teethed badly, and I found the Nelsons teetha helped (you can get that from Holland & Barret), but that is probably like the Parsons powder.
I used the teething ring you put in the fridge for them both, I always had 2 and alternated them when one warmed up lol. George was in a lot of pain when his inscisors came through (they are like razors), he had the snotty nose, red, swollen cheeks, nappy rash and bad poo with them all at once, he was miserable

Just keep with the Calpol and give him something to chew on.
Hope those teeth get through sharpish from him
