In the modern era, the story officially began in when Benjamin Duggar discovered Aureomycin (chlortetracycline). It was called "the golden antibiotic" because of the gold-colored bacteria it came from.
Today, buying tetracycline is strictly regulated for humans. It is and requires a legal prescription from a healthcare provider. Tetracyclines: Uses & Side Effects - Cleveland Clinic
This led to massive legal battles between pharmaceutical giants like Pfizer and Lederle Labs over patent rights and price-fixing, eventually paving the way for more affordable generic versions. 3. The "Fish Meds" Loophole
While commercially developed in the 1940s, the "first" humans to consume tetracycline were likely the nearly 2,000 years ago. Archeologists discovered large amounts of tetracycline in their bones, traced back to a specific type of grain-based beer. The soil bacteria Streptomyces —the source of natural tetracyclines—thrived in their fermenting vats, effectively lacing their daily brew with a "wonder drug" that likely protected them from bone disease. 2. The Mid-Century Patent Wars