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.
When stacking Motrin and Tylenol, how much time must you wait in between before giving the next dose? For instance we gave our son Tylenol at 5:00, so if we want to give him Motrin, how many hours do we wait in between. I can't recall what his doctor has said and we have heard everything from 2 hours to 6 hours.