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

   N05 PSYCHOLEPTICS

   N06 PSYCHOANALEPTICS

   N07 OTHER NERVOUS SYSTEM DRUGS

     N07A PARASYMPATHOMIMETICS

     N07B DRUGS USED IN ADDICTIVE DISORDERS

       N07BA Drugs used in nicotine dependence

         N07BA01 Nicotine [DG:DG00994]

         N07BA03 Varenicline [DG:DG00995]

         N07BA04 Cytisinicline

       N07BB Drugs used in alcohol dependence

       N07BC Drugs used in opioid dependence

     N07C ANTIVERTIGO PREPARATIONS

     N07X OTHER NERVOUS SYSTEM DRUGS

 P ANTIPARASITIC PRODUCTS, INSECTICIDES AND REPELLENTS

 R RESPIRATORY SYSTEM

 S SENSORY ORGANS

 V VARIOUS