Threadworm question

[PhotoBob2]

Why does the brand of mebendazole sold here in the UK (OVEX) say to take 1 tablet (or 5ml spoonful if taking the liquid) as a dose (i.e 100 mg) when the World Health organisation material on treating adults for worms indicates 400mg is an adult dose. I am 48 and am very unhappy to say I have worms. 2 dogs, 2 sons 19 and 15 and husband in house so I have treated us all as I expect I have noticed them but we all have them. Does anyone know why the dose is so small here in the UK?

You may be looking at the WHO doses for other worms I think.. THeir threadworm rec is the same as the NICE rec:

Enterobiasis

A single dose of 100 mg, repeated at least once after an interval of 2 to 4 weeks. It is advisable to treat all members of the household concurrently.

Thanks janinlondon - very reassuring xx