This classification is based upon therapeutic indications. The drugs named under each heading are those which by their physiologic action best meet the indication.

First Division. For Local Action.

Class I. Drugs used to destroy micro-organisms.

(a) To disinfect (Drugs too strong to be used upon the body). For buildings: Formaldehyde, Sulphurous Acid, Steam. For clothing: Formaldehyde, Heat. For dejecta: Chlorinated Lime.

(b) To inhibit the growth of bacteria upon the body or in one of its cavities (Antiseptics). Alcohol, Cresol, Formaldehyde solution, Hydrogen Dioxide solution, Mercuric Chloride, Phenol, Salicylio Acid.

(c) To destroy shin-parasites (Parasiticides). Beta-naphthol, Chrysarobin, Iodine, Pyrogallic Acid, Resorcin, Sulphur, the above Antiseptics.

Class II. Drugs used upon the skin.

(a) To protect (Dressings). Acetanilide, Bismuth preparations, Boric Acid, Iodine synthetical powders, Lycopodium, Talcum, Zinc Oxide, Zinc Stearate.

(b) To soothe (Emollients). Almond Oil, Boroglycer-ide, Cacao Butter, Glycerin, Olive Oil, Petroleum and Oils, Wool Fat.

(c) To cause hyperoemia (Mild counter-irritation). Tincture of Iodine, Liniments, Mustard.

(d) To blister. Cantharides.

(e) To corrode (Escharotics). Chromic Acid, Glacial Acetic Acid, Nitric Acid, Potassium Hydrate, Salicylic Acid, Silver Nitrate, Trichloracetic Acid.

Class III. Drugs used to act on mucous membranes.

(a) To soothe (Demulcents). Albumin Water, Barley water, Flaxseed infusion, Milk, Warm Physiologic Saline solution, Slippery Elm infusion.

(b) To diminish secretion (Astringents). Alum, Bismuth Salts, Weak Silver solutions, Suprarenal preparations, Tannic Acid, Weak Zinc solutions.

(c) To stimulate. Copper Salts, Silver Salts, Zinc Salts.

Class IV. Drugs used for local action in the stomach.

(a ) To increase the appetite (Stomachics). Cinchona, Gentian, Nux Vomica, Vegetable Bitters.

(1)) To aid digestion. Diastase, Hydrochloric Acid, Pancreatin, Pepsin.

(c) To reduce acidity (Antacids). Ammonia, Chalk, Lime Water, Magnesia, Sodium Bicarbonate.

(d) To cause vomiting (Emetics). Apomorphine (acting on the vomiting center), Copper Sulphate, Ipecac, Mustard, Zinc Sulphate.

Class V. Drugs used for local action in the intestinal canal.

(a) To increase peristalsis (Carminatives). Anise, Capsicum, Cardamon, Cinnamon, Peppermint.

(b) To promote evacuation of the bowels.

Laxatives

Purges

Salines

Irritants

Aloes

Calomel

Magnesium Citrate

Colocynth

Euonymus

Castor Oil

Croton Oil

Magnesia

Compound Cathartic

Magnesium Sulphate

Elaterium

Podophyllum

Jalap

Rhamnus Purshiana

Pill

Potassium and Sodium Tartrate

A large dose of any laxative

Rhubarb

Sulphur

Seidlitz Powder

Sodium Phosphate

Sodium

Sulphate

(c) To correct fermentation. Betanaphthol, Thymol, Salicylic Acid, Salol.

(d) To remove Parasites (Anthelmintics). Aspidium, Betanaphthol, Pepo, Quassia, Spigelia, Thymol.

Second Division.

For Systemic Action.

Class I. Drugs used to act on the skin after absorption.

(a) To stimulate. Arsenic, Thyroid.

(b) To decrease perspiration. Atropine, Sulphuric Acid.

(c) To increase perspiration (Diaphoretics). Alcohol, Antipyrine, Pilocarpine.

Class II. Drugs used to act upon the genito-urinary system.

(a) To increase the secretion of the mucous membranes Buchu, Caffeine, Digitalis, Scoparius, Squill, Water.

(b) To modify the character of the urine. Hexamethy-lenamina, Methylene Blue, Potassium Acetate, Potassium Bicarbonate, Potassium Citrate, Salicylic Acid, Salol.

(c) To stimulate the mucous membranes. Cantharides, Copaiba, Cubebs, Oil of Santal.

(d) To increase menstruation (Emmenagogues). Iron, Manganese Dioxide, Thyroid.

(e) To contract the uterus (Oxytocics). Ergot, Hydrastis, Quinine, Viburnum.

Class III. Drugs used to act upon the respiratory tract.

(a) To increase the secretion of mucous membranes (Expectorants). Ammonium Chloride (small doses), Ipecacuanha, Iodides.

(b) To decrease the secretion of the mucous membranes. Ammonium Chloride (large doses) Atropine, Codeine, Heroin, Morphine, Terpin Hydrate.

(c) To relax spasm. Atropine, Bromides, Chloral, Gel-semium, Morphine, Nitroglycerin, Stramonium, Tobacco.

Class IV. Drugs used to act on the circulation.

(a) To stimulate the heart. Alcohol, Ammonia, Camphor.

(b) To depress the heart. Aconite, Veratrum.

(c) To strengthen the heart. Caffeine, Digitalis, Strophanthus, Strychnine.

(d) To contract the blood vessels. Atropine, Ergot, Suprarenal.

(e) To dilate the blood vessels. Nitrites.

Class V. Drugs used to act upon the nervous system.

(a) To stimulate (Cerebral Stimulants, Antispasmodics, Excitomotors). Asafoetida, Caffeine, Camphor,

Cannabis Indica, Phosphorus, Strychnia, Thyroid, Valerian.

(b) To depress (Analgesics; Depresso-motors). Ace-tanilide, Aconite, Antipyrine, Belladonna, Bromides, Chloral, Opium, Phenacetine.

(c) To produce sleep (Hypnotics). Bromides, Chloral, Hyoscine, Paraldehyde, Sulphonal, Trional.

(d) To produce anesthesia. General: Chloroform, Ether, Nitrous Oxide. Local: Cocaine, Ethyl Chloride, Ice, Menthol, Phenol.

Class VI. Drugs used to lower the temperature of the body. (Antipyretics). - Acetanilide, Antipyrine, Cold, Phenacetine.

Class VII. Drugs used for actions which are specific.

Antitoxin in Diphtheria.

Cinchona in Malaria.

Colchicum in Acute Gout.

Iron in Anaemia.

Mercury in Syphilis.

Salicylic Acid in Acute Arthritis.

Thyroid in Myxoedema.

Drugs and Preparations Which May Cause an Eruption on, or Itching of, the Skin.

Antitoxin Arsenic Belladonna . Bromides Chloral Iodides

Opium Quinine Salicylic Acid Synthetic Compounds Volatile Oils, and drugs containing them.

Drugs Which May Change the Color of the Urine.

Drugs that increase its amount cause it to be lighter. Drugs that irritate the kidneys cause it to be darker.

Methylene Blue causes it to be green, if acid.

Phenol may cause it to be almost black.

Rhubarb may cause it to be brown (same appearance as bile).

Santonin causes it to be yellow, if acid; purple, if alkaline.

Senna may cause it to be red, if acid : yellow, if alkaline.

Sulphonal may cause it to be very dark.

Trional may cause it to be very dark.

Drugs Which Color the Faeces.

Bismuth Salts-color them black or dark gray. Colchicum colors them greenish. Iron colors them black. Mercury colors them green. Purgatives cause them to be darker.

Drugs Which Are Excreted With the Milk.

Arsenic

Bromides

Iodides

Lead

Mercury

Opium

Quinine

Sulphur

Vegetable Cathartics

Volatile Oils