THE PRESENT INVENTION, WHICH IS APPLICABLE IN THE PHARMACEUTICAL INDUSTRY, RELATES TO THE USE OF FIBRATES, IN PARTICULAR FENOFIBRATE, ESPECIALLY IN THE FORM OF A SOLID ORAL COMPOSITION, FOR THE MANUFACTURE OF A DRUG FOR THE TREATMENT OF SLEEP APNEA, SLEEP APNEA SYNDROME, IN PARTICULAR OBSTRUCTIVE SLEEP APNEA OR OBSTRUCTIVE SLEEP APNEA SYNDROME.