same here, i always have a sore throat after taking paracetemol and tried Googling it which lead me here, there's nothing online to explain it. I have to take Ibuprofen now every time rather than paracetemol even tho Ibuprofen isn't always the right painkiller to use but I really can't use Paracetemol any more, it's so uncomfortable, it happens within a minute of taking it and lasts about an hour. It is every time for me, I do take it with water or juice and no other tablet has this effect on me. Although I'm gutted for you that it happens, it's a little bit reassuring to know that I'm not the only person it happens to. Can't be many of us though since Google pulls up no results.