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

   N01 ANESTHETICS

   N02 ANALGESICS

     N02A OPIOIDS

     N02B OTHER ANALGESICS AND ANTIPYRETICS

     N02C ANTIMIGRAINE PREPARATIONS

       N02CA Ergot alkaloids

         N02CA01 Dihydroergotamine [DG:DG00833]

         N02CA02 Ergotamine [DG:DG00834]

         N02CA04 Methysergide [DG:DG00835]

         N02CA07 Lisuride [DG:DG00453]

         N02CA51 Dihydroergotamine, combinations

         N02CA52 Ergotamine, combinations excl. psycholeptics

         N02CA72 Ergotamine, combinations with psycholeptics

       N02CB Corticosteroid derivatives

       N02CC Selective serotonin (5HT1) agonists [DG:DG01943]

       N02CD Calcitonin gene-related peptide (CGRP) antagonists

       N02CX Other antimigraine preparations

   N03 ANTIEPILEPTICS

   N04 ANTI-PARKINSON DRUGS

   N05 PSYCHOLEPTICS

   N06 PSYCHOANALEPTICS

   N07 OTHER NERVOUS SYSTEM DRUGS

 P ANTIPARASITIC PRODUCTS, INSECTICIDES AND REPELLENTS

 R RESPIRATORY SYSTEM

 S SENSORY ORGANS

 V VARIOUS