Rhazes

Abū Bakr al-Rāzī (known to the Western world by his Latinized name, Rhazes) was a legendary Persian polymath, physician, alchemist, and philosopher who lived during the Islamic Golden Age. He authored over 200 scientific treatises and is widely celebrated as one of the greatest clinical physicians in human history

Early Life and Education

• Birth: Born around 865 CE in the ancient city of Rayy (near modern-day Tehran, Iran).
• Early Passions: In his youth, he focused intensely on music, philosophy, and poetry.
• The Alchemy Phase: He transitioned into alchemy and chemistry, successfully discovering sulphuric acid and isolating ethanol (alcohol).
• The Medical Shift: Around age 30, severe eye irritation caused by his chemical experiments forced him to stop practical alchemy. He pivoted to studying medicine under Ali ibn Sahl Rabban al-Tabari, combining Greek, Persian, and Indian medical knowledge

Medical Career

Rhazes quickly earned a reputation for brilliant clinical acumen, leading to prominent administrative positions:

• The Meat Experiment: When selected to choose a location for a new hospital in Baghdad, he hung pieces of fresh meat in various quarters of the city. He built the hospital in the neighborhood where the meat putrefied the slowest, pioneering early concepts of sanitation and air quality.
• Hospital Director: He served as the chief physician and director of major hospitals in both Rayy and Baghdad.
• Psychiatric Pioneer: He is credited with founding the world’s first specialized psychiatric ward in Baghdad, promoting the compassionate and medicalized treatment of mental illness

Major Achievements

Rhazes advanced evidence-based medicine by rejecting blind adherence to ancient texts in favor of rigorous empirical observation. [1, 2, 3, 4]

• Smallpox vs. Measles: He wrote Kitab al-Judari wa al-Hasbah, providing the first authentic account distinguishing smallpox from measles.
• Father of Pediatrics: He wrote the first independent book dedicated entirely to children’s diseases.
• Immunology: He was the first to identify allergic asthma and detail seasonal rhinitis (allergic reactions to smelling spring roses).
• Fever as a Defense: He accurately deduced that fever is a natural defense mechanism used by the immune system to fight off infections.

Major Written Works

• Al-Hawi fi al-Tibb (The Comprehensive Book): A massive 23-volume medical encyclopedia that compiled all known Greco-Roman, Persian, and Indian medical knowledge alongside Rhazes’ own case histories. It served as a foundational textbook in European universities for centuries.
• Kitab al-Tibb al-Mansuri: A concise ten-volume manual on internal medicine, surgery, and ophthalmology dedicated to the governor of Rayy.
• For Those Without a Doctor: A home medical manual written explicitly for poor citizens, travelers, and ordinary people unable to afford or access professional doctors

In his final years, Rhazes suffered from total blindness due to cataracts, allegedly refusing surgery because he claimed to have seen enough of the world. He died in his hometown of Rayy around 925 CE.

Formulas of Rhazes