Available forms, composition and doses of ISDN Retard: Capsules, Retard; Oral; Isosorbide Dinitrate 120 mg Capsules, Retard; Oral; Isosorbide Dinitrate 20 mg Capsules, Retard; Oral; Isosorbide Dinitrate 40 mg Capsules, Retard; Oral; Isosorbide Dinitrate 80 mg ...