The green bottle in every drugstore wasn't designed to fix hair. It was designed to fix blood pressure - and even that wasn't the original plan.

An Ulcer Drug That Couldn't Cure Ulcers

In the late 1950s, chemists at Upjohn Company were searching for a new treatment for stomach ulcers. One compound they synthesized - later refined into minoxidil - showed promise in the lab. But when they tested it on animals, it did nothing for ulcers. What it did do was dramatically lower blood pressure by relaxing blood vessel walls. By 1963, Upjohn had developed minoxidil itself as a vasodilator: a drug that widens blood vessels and reduces hypertension.

The Side Effect Nobody Expected

The FDA approved oral minoxidil - sold as Loniten - in 1979 for patients with severe, drug-resistant high blood pressure. That's when doctors noticed something strange. In clinical trials, roughly 60 to 80 percent of patients taking Loniten reported growing new hair - on their faces, hands, and scalps. Upjohn's executives initially dismissed the phenomenon as a minor cosmetic nuisance and chose not to pursue it.

The Letter That Changed Everything

Upjohn's silence didn't last. In 1980, a physician named Zappacosta published a letter in the New England Journal of Medicine describing how a balding patient's hair had reversed while on minoxidil for hypertension. The letter was widely read. Upjohn realized that if they didn't develop a hair loss product, a competitor would. The company began clinical trials for a topical minoxidil solution - far lower dose, applied directly to the scalp to avoid blood pressure effects.

The FDA Blocked the Name "Regain"

Upjohn wanted to call the new product Regain. The FDA refused, ruling the name made an unacceptable promise - not every user would regrow hair. The company settled on Rogaine. On August 17, 1988, the FDA approved it as the first drug ever cleared specifically to treat male pattern baldness. It cost around $600 a year by prescription.

From Prescription to Pharmacy Shelf

In 1991, Rogaine received approval for women. By 1996, the FDA cleared over-the-counter sales, and the green bottle became a fixture of drugstore shelves worldwide. Today, minoxidil is still a blood pressure drug - and still a hair loss drug. The same molecule does both jobs. The only difference is how much you take and where you put it.

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