Duplication or reproduction of existing classified information is not derivative classification. Persons who apply classification markings derived from source material or as directed by a classification guide need not possess original classification authority. (b) Responsibility.
According to my doctor, 4 hours. You can switch them up. Take acetaminophen, (Tylenol), then wait 4 hours and take Ibuprofen, wait another 4 hours and take acetaminophen and so on. :) 15 people found this useful.
1 Take Tylenol, 2 tablets every 4-6 hours for fever, do not take more than 8 extra-strength Tylenol (500mg) tablets in one day. 2  Take Ibuprofen (advil, motrin), 2-3 tablets every 4-6 hours. 3  Do not use Ibuprofen if you have a history of aspirin allergy or a stomach ulcer. You can use both ibuprofen and Tylenol (acetaminophen) for fever control. 2  You can alternate them, so that you can take one or the other every 2-3 hours if your fever is still up. 3  For instance, if you take 2 tylenol at 10am and still have a fever at noon, you can take Ibuprofen.