17.4 million items (20.7% of all items) were prescribed and dispensed for the treatment of the central nervous system, equal to 5.4 items per head of population registered with a GP in Wales.
Cafodd 17.4 miliwn o eitemau eu rhagnodi i drin y brif system nerfol, sy’n cyfateb i 5.4 eitem fesul pen o’r boblogaeth sydd wedi cofrestru â meddyg teulu yng Nghymru.