Can you buy over the counter stuff for worms?

[NbgSparklyYellowFeathers]

DD (3) has complained for the second day now that she has "spiders up her bum" and her "bum tickles" (charming!).
I'm almost sure its worms but obviously being sunday theres no Dr's and all our chemists are shut.
My mum has offered to get some from her town and drive them through if I can get them.

So does anyone know if you can buy it and is she old enough to take them?

Yeah, they're good for over 2s, I think. Ovex is one brand.

Oooh great. Thanks NQC.
Have just called NHS Direct for some advice but have to wait for the nurse advisor to call back.

Typical it comes just before xmas!