At week 6 , 1 % terbinafine FFS was superior to placebo for effective treatment rate ( 63 vs. 8 % ) ; clinical cure ( 30 vs. 6 % ) ; mycological cure ( 86 vs. 12 % ) ; negative microscopy ( 90 vs. 24 % ) ; and negative mycological culture ( 90 vs. 27 % ) : all p 0.001 and clinically relevant .