I am having happy feelings on ibuprofen. is this normal?

If you were in pain: Not a typical response but i suppose if pain had you feeling depressed and Ibuprofen helped the pain then you could get happy feelings from it. It could also be purely coincidental. I can't think of any other scientific reason that would happen. The only thing i found is that you can get mood swings with overdoses of nsaids (like ibuprofen).