Ole Injun was an alleged medical product, a "system tonic", marketed on 19th century Earth. It was said to be produced by Dr. Haile and help with the kidneys, liver, and stomach.
A drug broker in San Francisco advertised the product in their window in 1893, their advertisement containing a picture of an American Indian in traditional garb. (TNG: "Time's Arrow")
This product was only mentioned in writing.