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

   N03 ANTIEPILEPTICS

   N04 ANTI-PARKINSON DRUGS

     N04A ANTICHOLINERGIC AGENTS

     N04B DOPAMINERGIC AGENTS

       N04BA Dopa and dopa derivatives

       N04BB Adamantane derivatives

       N04BC Dopamine agonists

       N04BD Monoamine oxidase B inhibitors

       N04BX Other dopaminergic agents

         N04BX01 Tolcapone

         N04BX02 Entacapone

         N04BX03 Budipine [DG:DG00866]

         N04BX04 Opicapone

     N04C OTHER ANTIPARKINSON DRUGS

   N05 PSYCHOLEPTICS

   N06 PSYCHOANALEPTICS

   N07 OTHER NERVOUS SYSTEM DRUGS

 P ANTIPARASITIC PRODUCTS, INSECTICIDES AND REPELLENTS

 R RESPIRATORY SYSTEM

 S SENSORY ORGANS

 V VARIOUS