acetaminophen when was it invented

Acetaminophen (also called paracetamol) was first synthesized in the late 19th century, around 1877–1878, but it did not become a widely used medicine until the mid‑20th century.

Quick Scoop

• The chemical that we now know as acetaminophen was first made by the chemist Harmon Northrop Morse at Johns Hopkins University in about 1877–1878.

• It was created by reducing a compound called ppp-nitrophenol using tin in glacial acetic acid, a typical 19th‑century organic chemistry setup.

• Early doctors and researchers noticed pain‑ and fever‑reducing effects in related coal‑tar derivatives (like acetanilide) in the 1880s, but acetaminophen itself was largely ignored for decades.

• Interest revived in the mid‑1900s when researchers realized acetaminophen was a safer active metabolite of older drugs, with fewer dangerous side effects than acetanilide and phenacetin.

• It was finally introduced to the market under the brand name Tylenol in the 1950s and then became a staple pain and fever reducer worldwide.

So, “when was it invented”?

If you’re thinking about the invention of the molecule itself , the key date is 1877–1878, when Morse first synthesized paracetamol/acetaminophen in the lab.

If you’re thinking about its invention as a popular medicine , that really happens much later, with clinical use described in the late 1880s and mainstream commercial launch (for example, Tylenol in 1955) helping it become the common over‑the‑counter drug you see today.

Information gathered from public forums or data available on the internet and portrayed here.