Word Origin & History. coarse 1424, cors ordinary, probably adj. use of noun cours (see course), originally referring to rough cloth for ordinary wear. Developed a sense of rude c.1510 and obscene 1711. Perhaps related, via metathesis, to Fr. gros, which had a similar sense development.
Adults and children 12 years and over should take 2 tablets, caplets, gelcaps or tablespoons every 4 to 6 hours as needed -- with no more than 8 tablets, caplets, gelcaps or tablespoons in 24 hours. Extra strength Tylenol should not be taken for more than 10 days unless directed by a doctor. It must be emphasized -- you should take no more than 8 extra strength Tylenol per day. The maximum allowable daily dose of Tylenol (acetaminophen) is 4 grams (or 4,000 mg) in adults and 90 mg/kg in children. Do the math -- 8 times 500 mg equals 4,000 mg -- the daily maximum you can safely take.
Tylenol contains acetaminophen. The maximum daily dose of acetaminophen must not exceed 4000 mg ('daily' means 24 hours). It is not recommended to take more than 1000 mg of acetaminophen at a time. The interval between 1000 mg doses should be about 6 hours. 500 mg doses can be taken more frequently, e.g. every four hours. Each Tylenol 500 gelcap, etc, contains 500 mg of pure acetaminophen.