Cna't seem to work out what focus mind cures. I'm thinking.. stupidity/anorexia/confusion/dizziness? But that's all I can get. Any help, much appreciated.

According to the Scrying Pool:

I love you. For some reason, I could not find that.

I thought it also cured loneliness and weakness, but can't test that right now.

I happened to get weakness of someone's random charybdon hit earlier. Focus mind doesn't cure it.

And I'm pretty sure it doesn't cure loneliness, because I seem to remember thinking it was odd that it didn't.

Note: ScryingPool can, and probably will, have mistakes. Some information on that site can be outdated, or have its tests performed incorrectly.

I think it's correct on this issue though.

Also, Focus Mind certainly doesn't cure Weakness. It wouldn't make sense anyway - it's a physical affliction, not a mental one!

Focus mind used to cure weakness. That I'm sure of.

is weakness the one where you can't sprint? because I promise you it is curable by focus mind. I constantly do it and I get hit with that at ton from garghoul's charybdon. I didn't know it cured epilepsy so I'll just test that out.

It cures epilepsy.