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

     R05C EXPECTORANTS, EXCL. COMBINATIONS WITH COUGH SUPPRESSANTS

     R05D COUGH SUPPRESSANTS, EXCL. COMBINATIONS WITH EXPECTORANTS

       R05DA Opium alkaloids and derivatives

         R05DA01 Ethylmorphine [DG:DG01074]

         R05DA03 Hydrocodone [DG:DG01075]

         R05DA04 Codeine [DG:DG01076]

         R05DA05 Opium alkaloids with morphine

         R05DA06 Normethadone

         R05DA07 Noscapine [DG:DG01077]

         R05DA08 Pholcodine

         R05DA09 Dextromethorphan [DG:DG01078]

         R05DA10 Thebacon [DG:DG01079]

         R05DA11 Dimemorfan [DG:DG01080]

         R05DA12 Acetyldihydrocodeine

         R05DA20 Combinations

       R05DB Other cough suppressants

     R05F COUGH SUPPRESSANTS AND EXPECTORANTS, COMBINATIONS

     R05X OTHER COLD PREPARATIONS

   R06 ANTIHISTAMINES FOR SYSTEMIC USE

   R07 OTHER RESPIRATORY SYSTEM PRODUCTS

 S SENSORY ORGANS

 V VARIOUS