For neoplastic disorders

cytotoxic drug
sex hormones
aromatase inhibitor
somatostatin inhibitor
recombinant interleukins
G-CSF
erythropoietin

For nutrition

tonic,
iron preparation,
electrolyte
parenteral nutritional supplement
vitamins
anti-obesity drug
anabolic drug
haematopoietic drug
food product drug

For allergic disorders

anti-allergic,
antihistamine
NSAIDs

For immunology

vaccine
immunoglobulin
immunosuppressant
interferon
monoclonal antibody

For infections and infestations

antibiotic
antifungal
antileprotic
antituberculous drug
antimalarial
anthelmintic
amoebicide
antiviral
antiprotozoal

For the skin

emollient
anti-pruritic
antifungal
disinfectant
scabicide
pediculicide
tar products
vitamin A derivatives
vitamin D analogue
keratolytic
abrasive
systemic antibiotic
topical antibiotic
hormones
desloughing agent,
exudate absorbent,
fibrinolytic
proteolytic
sunscreen
antiperspirant
corticosteroid

For obstetrics and gynecology

NSAIDs
anticholinergic
haemostatic drug
antifibrinolytic
Hormone Replacement Therapy
bone regulator
beta-receptor agonist
follicle stimulating hormone
luteinising hormone
LHRH gamolenic acid
gonadotropin release inhibitor
progestogen
dopamine agonist
oestrogen
prostaglandin
gonadorelin
clomiphene
tamoxifen
Diethylstilbestrol

For contraception

Hormonal contraception
Ormeloxifene
Spermicide

For the reproductive system or urinary system

antifungal
alkalising agent,
quinolones
antibiotic
cholinergic
anticholinergic
anticholinesterase
antispasmodic
5-alpha reductase inhibitor,
selective alpha-1 blocker,
sildenafil
fertility medication

For the respiratory system

bronchodilator
NSAIDs
anti-allergic
antitussive
mucolytic
decongestant
corticosteroid
beta-receptor antagonist
anticholinergic
steroid

For the ear, nose and oropharynx

sympathomimetic
antihistamine
anticholinergic
NSAIDs
steroid
antiseptic
local anesthetic
antifungal
cerumenolyti

For the eye

General:
adrenergic neurone blocker
astringent
ocular lubricant

Diagnostic:
topical anesthetics
sympathomimetics
parasympatholytics
mydriatics
cycloplegics

Anti-bacterial:
antibiotics
topical antibiotics
sulfa drugs
aminoglycosides
fluoroquinolones

Anti-viral:

Anti-fungal:
imidazoles
polyenes

Anti-inflammatory:
NSAIDs
corticosteroids

Anti-allergy:
mast cell inhibitors

Anti-glaucoma:
adrenergic agonists,
beta-blockers
carbonic anhydrase inhibitors/hyperosmotics
cholinergics
miotics
parasympathomimetics
prostaglandin agonists/prostaglandin inhibitors.
nitroglycerin

For musculo-skeletal disorders

NSAIDs (including COX-2 selective inhibitors)

muscle relaxant
neuromuscular drug
anticholinesterase

For pain & consciousness (analgesic drugs)

Analgesic

The main classes of painkillers are NSAIDs, opioids and various orphans such as :

paracetamol,
tricyclic antidepressants
anticonvulsants

For the central nervous system

Psychiatric medication
hypnotic
anaesthetics
antipsychotic
antidepressant (including tricyclic antidepressants, monoamine oxidase inhibitor, lithium salt, selective serotonin reuptake inhibitor),
anti-emetic
anticonvulsant and antiepileptic
anxiolytic
barbiturate

Movement disorder drug
stimulant (including amphetamines),
benzodiazepine
cyclopyrrolone
dopamine antagonist
antihistamine
cholinergic
anticholinergic
emetic
cannabinoids
5-HT antagonist

For the cardiovascular system

General:
beta-receptor blocker or beta blocker
calcium channel blockers
diuretics
cardiac glycosides
antiarrhythmics
nitrate
antianginals
vasoconstrictor
vasodilator
peripheral activator

Affecting Blood pressure:
ACE inhibitors
angiotensin receptor blockers
alpha blocker

Coagulation:
anticoagulant
heparin
antiplatelet drug
fibrinolytic
anti-hemophilic factor
haemostatic drugs

Atherosclerosis/cholesterol agents:
hypolipidaemic agents
statins

For the gastrointestinal tract or digestive system

Upper digestive tract:
antacids
reflux suppressants
antiflatulents
antidopaminergics
proton pump inhibitors
H2-receptor antagonists
cytoprotectants
prostaglandin analogues

Lower digestive tract:
laxatives
antispasmodics
antidiarrhoeals
bile acid sequestrants
opioids