Even if i dont have bacterial resp. infection can i take my rx cefdinir. i am flying in 3 days&am worried about the pressurized air. ?

But why?: That's like saying, "I don't have high blood pressure, but can I take blood pressure drugs anyway?" We breathe air at sea level that has "1 atmosphere" of pressure, if we are at the beach. A flying airliner's air has LESS pressure than at the beach, because the plane's cabin air pressure is set at 6000-7000 feet high in the plane. So, being in the plane is like being at a ski resort at 6500 feet.