been put on 300mg per day the help with sciatica only been on them a wk but yesterday felt like i was doped up couldnt seem to concentrate properly ended up goin to bed but dueing night felt like i had a fever hot and sweaty woken up today not feeling much better and have headache is this normal side effects ?. plus reading other review why is there weight gain involved in these tablets is it just down to increased appetite or do you just notice weight gain this worrys me as ive just lost 4.1/2 . stone cant cope with a weight gain . and if what i have asked is normal can i just stop takin them look forward to some replies .