A ALIMENTARY TRACT AND METABOLISM

 B BLOOD AND BLOOD FORMING ORGANS

 C CARDIOVASCULAR SYSTEM

   C01 CARDIAC THERAPY

   C02 ANTIHYPERTENSIVES

   C03 DIURETICS

   C04 PERIPHERAL VASODILATORS

     C04A PERIPHERAL VASODILATORS

       C04AA 2-amino-1-phenylethanol derivatives

       C04AB Imidazoline derivatives

         C04AB01 Phentolamine [DG:DG00280]

         C04AB02 Tolazoline [DG:DG00281]

       C04AC Nicotinic acid and derivatives

       C04AD Purine derivatives

       C04AE Ergot alkaloids

       C04AF Enzymes

       C04AX Other peripheral vasodilators

   C05 VASOPROTECTIVES

   C07 BETA BLOCKING AGENTS

   C08 CALCIUM CHANNEL BLOCKERS

   C09 AGENTS ACTING ON THE RENIN-ANGIOTENSIN SYSTEM

   C10 LIPID MODIFYING AGENTS

 D DERMATOLOGICALS

 G GENITO URINARY SYSTEM AND SEX HORMONES

 H SYSTEMIC HORMONAL PREPARATIONS, EXCL. SEX HORMONES AND INSULINS

 J ANTIINFECTIVES FOR SYSTEMIC USE

 L ANTINEOPLASTIC AND IMMUNOMODULATING AGENTS

 M MUSCULO-SKELETAL SYSTEM

 N NERVOUS SYSTEM

 P ANTIPARASITIC PRODUCTS, INSECTICIDES AND REPELLENTS

 R RESPIRATORY SYSTEM

 S SENSORY ORGANS

 V VARIOUS