A ALIMENTARY TRACT AND METABOLISM

 B BLOOD AND BLOOD FORMING ORGANS

 C CARDIOVASCULAR SYSTEM

 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

   R01 NASAL PREPARATIONS

   R02 THROAT PREPARATIONS

   R03 DRUGS FOR OBSTRUCTIVE AIRWAY DISEASES

   R05 COUGH AND COLD PREPARATIONS

   R06 ANTIHISTAMINES FOR SYSTEMIC USE

     R06A ANTIHISTAMINES FOR SYSTEMIC USE

       R06AA Aminoalkyl ethers

       R06AB Substituted alkylamines

       R06AC Substituted ethylene diamines

         R06AC01 Mepyramine [DG:DG00382]

         R06AC02 Histapyrrodine

         R06AC03 Chloropyramine [DG:DG00384]

         R06AC04 Tripelennamine [DG:DG00383]

         R06AC05 Methapyrilene

         R06AC06 Thonzylamine [DG:DG00381]

         R06AC52 Histapyrrodine, combinations

         R06AC53 Chloropyramine, combinations

       R06AD Phenothiazine derivatives

       R06AE Piperazine derivatives

       R06AK Combinations of antihistamines

       R06AX Other antihistamines for systemic use

   R07 OTHER RESPIRATORY SYSTEM PRODUCTS

 S SENSORY ORGANS

 V VARIOUS