What is more, in individuals carrying combined GSTP1ABValVal/GSTO1 AspAsp genotype, the odds of having myalgia were even lower (OR = 0.24, 95%CI 0.09–0.66) when compared to carriers of combined GSTP1IleIle/GSTO1AlaAla genotype. This evidence concerns the gene GSTO1 and Myalgia.