Drinks on a plane: Consider saying no

The combination of drinking alcohol and sleeping while on a plane puts a big strain on the body, especially the cardiovascular system. This is because blood oxygen normally drops slightly when flying high above sea level, sleeping, or consuming alcohol. The more contributors to low blood oxygen there are, the harder the body has to work to compensate by breathing faster and increasing heart rate. There’s even more strain if someone has heart or lung disease, which places the person at a higher risk for a heart attack or stroke.