Disclosed is the use of MEK inhibitor compound 6-(4-bromo-2-fluorophenylamino)-7-fluro-3-methyl-3H-benzoimidazole-5-carboxylic acid (2-hydroxyethoxy)-amide of Formula (I) for the preparation of a medicament for the treatment of Noonan Syndrome. Also disclosed is a method of treating a warm-blooded non-human animal having Noonan Syndrome, comprising administering to said non animal a therapeutically effective amount of a MEK inhibitor compound of Formula (I).