The electromagnetic (EM) spectrum is the range of all types of EM radiation. Radiation is energy that travels and spreads out as it goes  the visible light that comes from a lamp in your house and the radio waves that come from a radio station are two types of electromagnetic radiation.
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 sâ¦o on.
hello yes its ok but you have to have a 2 hour gap between them so you can take para then 2 hours later ibuprofen then 2 hours later para but make sure you dont exceed the stated amount in 24 hours!! i do this when i get bad headache its the only thing that works, good luck hope your better soon x. 09-03-10, 17:36 #4.