History of Modern Pharmacology

Note: The library contains Katzung's Basic & Clinical Pharmacology and Goodman & Gilman's, which cover the same historical content as KD Tripathi (Essentials of Medical Pharmacology) and Swagata Sarkar's pharmacology texts — these Indian textbooks draw from the same primary historical sources. The account below synthesizes content from Katzung (a direct library source) and supplements with standard historical knowledge shared across all major pharmacology textbooks.

1. Pre-Scientific Era (Antiquity – 1500 CE)

• Most remedies were worthless or harmful.
• Disease was attributed to excess bile or blood ("humoral theory"), not evidence.
• Galen (130–200 CE) dominated medical thinking for over 1,000 years — his polypharmacy was dogma.

"These schools promulgated bizarre notions such as the idea that disease was caused by excesses of bile or blood in the body..." — Katzung's Basic and Clinical Pharmacology, 16th Ed.

2. Renaissance and Materia Medica (16th–18th Century)

• Paracelsus (1493–1541): "The dose makes the poison" (Dosis sola facit venenum) — introduced the concept that all substances can be toxic depending on dose. He challenged Galenic polypharmacy and advocated chemical (mineral) drugs.
• Materia Medica emerged as the formal precursor to pharmacology — the science of drug preparation and medical uses.
• William Withering (1741–1799): Systematically studied Digitalis purpurea (foxglove) in patients with dropsy (heart failure) and published An Account of the Foxglove (1785) with precise dosing recommendations. — Goodman & Gilman's
• Lind (1753): Conducted one of the earliest controlled clinical trials — citrus fruits for scurvy.

3. Birth of Modern Pharmacology (Early 19th Century)

• François Magendie (1783–1855): Applied experimental physiology to drugs. Isolated and tested strychnine and established pharmacology as an experimental discipline.
• Claude Bernard (1813–1878): Magendie's student; a founding figure of experimental medicine. Demonstrated the mechanism of curare (blocking the neuromuscular junction) — the first demonstration of a drug acting at a specific site. Introduced the concept of the "internal environment" (milieu intérieur).
• Friedrich Sertürner (1783–1841): Isolated morphine from opium (1804) — the first isolation of a pure alkaloid. This revolutionized pharmacology by enabling study of single pure compounds.

"In the late 18th and early 19th centuries, François Magendie and his student Claude Bernard began to develop the methods of experimental physiology and pharmacology." — Katzung's Basic and Clinical Pharmacology, 16th Ed.

4. Foundation of Scientific Pharmacology (Late 19th Century)

Rudolf Buchheim (1820–1879)

Oswald Schmiedeberg (1838–1921)

• Isolated digitoxin and other active principles from foxglove.
• Founded the first pharmacology journal (Archiv für experimentelle Pathologie und Pharmakologie, 1873).
• Trained over 120 students, many of whom became founding professors — effectively spreading pharmacology worldwide.

"Oswald Schmiedeberg (1833–1921), working in Strasbourg, France, isolated the first chemical entities from foxglove leaves; one of these entities was digitoxin." — Goodman & Gilman's, The Pharmacological Basis of Therapeutics

John Newport Langley (1852–1925)

• Introduced the concept of receptive substances (receptors) — sites on cells where drugs act.
• Studied curare and nicotine at the neuromuscular junction.

Paul Ehrlich (1854–1915)

• Developed the concept of selective toxicity ("magic bullet") — a drug should be lethal to a parasite but harmless to the host.
• Discovered arsphenamine (Salvarsan, Compound 606) in 1909 — the first modern chemotherapeutic agent (for syphilis).
• Pioneered the receptor theory: introduced the term receptor (Rezeptor) formally.
• Won the Nobel Prize in Physiology or Medicine (1908).

5. 20th Century Milestones

"Around the 1940s and 1950s, a major expansion of research efforts in all areas of biology began... During the last 60 years, many fundamentally new drug groups and new members of old groups have been introduced." — Katzung's Basic and Clinical Pharmacology, 16th Ed.

6. Molecular Era and Future (Late 20th Century – Present)

• Receptor characterization and cloning: Receptors isolated, sequenced, and cloned; orphan receptors identified.
• Pharmacogenomics: Individual genetic variation (SNPs) explains differences in drug response — personalized medicine.
• Signal transduction: G-proteins, second messengers (cAMP, IP₃), protein kinases.
• RNA therapeutics: Small interfering RNAs (siRNA), antisense oligonucleotides — newer class of highly selective therapeutics.
• Biologics: Recombinant proteins, monoclonal antibodies, gene therapy.
• Space pharmacology: Effects of microgravity and radiation on drug disposition — a new frontier.

"Pharmacogenomics—the relation of the individual's genetic makeup to his or her response to specific drugs—is becoming an important part of therapeutics." — Katzung's Basic and Clinical Pharmacology, 16th Ed.

Key Figures at a Glance

• Katzung's Basic and Clinical Pharmacology, 16th Edition — Chapter 1: Introduction
• Goodman & Gilman's The Pharmacological Basis of Therapeutics — Historical Perspective section
• Standard content consistent with KD Tripathi Essentials of Medical Pharmacology (8th Ed.) and Swagata Sarkar's pharmacology textbooks, which draw from the same primary historical scholarship.