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

     N01A ANESTHETICS, GENERAL

       N01AA Ethers

       N01AB Halogenated hydrocarbons

       N01AF Barbiturates, plain

       N01AG Barbiturates in combination with other drugs

       N01AH Opioid anesthetics

         N01AH01 Fentanyl [DG:DG00791]

         N01AH02 Alfentanil [DG:DG00792]

         N01AH03 Sufentanil [DG:DG00793]

         N01AH04 Phenoperidine

         N01AH05 Anileridine [DG:DG00794]

         N01AH06 Remifentanil [DG:DG00795]

         N01AH51 Fentanyl, combinations

       N01AX Other general anesthetics

     N01B ANESTHETICS, LOCAL

   N02 ANALGESICS

   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