Preparation H is a brand of medications made by Pfizer, used in the treatment of hemorrhoids. Hemorrhoids are caused at least in part by inflamed blood vessels, and most versions of Preparation H work by reducing inflammation in blood vessels.
Originally, as far back as the 1930s, it was packaged in a tube like toothpaste, with a similar consistency. Now named Wyeth and owned by Pfizer, the company incorporated in 1926 as American Home Products, or AHP, and "one of AHP's earliest prizes was the acquisition of a sunburn oil in 1935 that the company transformed into Preparation H, which became one of the world's best-selling hemorrhoid treatments." AHP changed its name to Wyeth in 2002, and was then bought by Pfizer in 2009, who was reported to have paid 68 billion dollars.
Read more about Preparation H: Formulations, Supply Disruption
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