Gastrointestinal tract (A)
• Antacids;
• Antiemetics;
• H2 antagonists;
• Proton pump inhibitors;
• Laxatives;
• Antidiarrhoeals.
Blood and blood forming organs (B)
• Anticoagulants;
• Antiplatelets;
• Thrombolytics.
Cardiovascular system (C)
• Antiarrhythmics;
• Antihypertensives;
• Diuretics;
• Vasodilators;
• Antianginals;
• Beta blockers;
• Angiotensin converting enzyme inhibitors;
• Antihyperlipidemics.
Skin (D)
• Emollients - Antipruritics.
Reproductive system (G)
• Hormonal contraception;
• Fertility agents;
• Selective estrogen receptor modulators;
• Sex hormones.
Endocrine system (H)
• Anti-diabetics;
• Corticosteroids;
• Sex hormones;
• Thyroid hormones.
Infections and Infestations (J, P)
• Antibiotics;
• Antivirals;
• Vaccines;
• Antifungals;
• Antiprotozoals;
• Anthelmintics.
Malignant and Immune disease (L)
• Anticancer agents;
• Immunostimulators;
• Immunosuppressants.
Muscles, Bones, and Joints (M)
• Anabolic steroids;
• Anti-inflammatories;
• Antirheumatics;
• Corticosteroids;
• Muscle relaxants.
Brain and Nervous system (N)
• Anesthetics;
• Analgesics;
• Anticonvulsants;
• Mood stabilizers;
• Anxiolytics;
• Antipsychotics;
• Antidepressants;
• Nervous system stimulants;
• Sedatives.
Respiratory system (R)
• Bronchodilators;
• Decongestants;
• H1 antagonists.