No, flexeril is a muscle relaxant. The drug name is cyclobenzaprine. Ibuprofen is a non-steroidal anti-inflammatory pain medicine. You can safely take a pain reliever and a muscle relaxant together. They work together to help reduce your discomfort.
This force exerted by air molecules or what is called as Atmospheric pressure is measured by barometer. At sea level the amount of pressure exerted by the atmosphere is about 14.7 pounds/square inch. This means at sea level an object experiences 14.7 pounds of pressure pushing against every square inch of object. When heat energy is added to molecules, they begin to move rapidly. This causes the molecules to exert increased pressure as they bump into the objects around them.
An example of this is the air pressure in an automobile tire, which might be said to be 220 kPa (32 psi), but is actually 220 kPa (32 psi) above atmospheric pressure. Since atmospheric pressure at sea level is about 100 kPa (14.7 psi), the absolute pressure in the tire is therefore about 320 kPa (46.7 psi).