Henderson’s Materia Medica [PDF ebook] 

Now in its third edition, this standard text meets the need for a single source of detailed information on the drugs in use in English-speaking countries. Dr. Henderson based his book on the British Pharmacopoeia, and the revisers have included the preparations in the fourteenth revision of the United States Pharmacopoeia, pointing out differences and similarities in terminology and usage. Drugs are arranged by English rather than Latin titles.