Where was tylenol founded?

Where was Tylenol founded?

Tylenol (acetaminophen) was developed in the United States by McNeil Laboratories, which was based in Philadelphia, Pennsylvania. [1]

What company started Tylenol’s development?

Tylenol traces back to McNeil Laboratories’ work on acetaminophen and its later marketing under the Tylenol brand in the U.S. [1]

Why do people mention different places?

You may see different locations mentioned depending on whether the source is referring to the original research/manufacturing company (McNeil Laboratories) versus later corporate ownership and brand management under Johnson & Johnson. The brand’s early development is tied to McNeil’s U.S. operations in Philadelphia. [1]

Sources:
[1] https://www.drugpatentwatch.com/p/tylenol