If your doctor has directed you to use this medication, remember that he or she has judged that the benefit to you is greater than the risk of side effects. Many people using this medication do not have serious side effects. Tell your doctor right away if this unlikely but serious side effect occurs: rectal bleeding. A very serious allergic reaction to this drug is unlikely, but seek immediate medical attention if it occurs.
Since the air pressure is lower at high altitudes, your body may struggle to absorb much-needed oxygen. This can cause disorientation, headaches, nausea, shortness of breath and weakness. In severe cases people have been hospitalized. There are many ways to get used to the altitude so you can still enjoy your getaway.
Air pressure changes with altitude. Air is all around us, but we cannot see it. Gravity from the Earth pulls air down - this is called air pressure. We don't feel this pressure because our bodies push an equal amount of pressure outward. This graph shows how air density and air pressure changes with altitude (the distance above sea level). Barometers are used to measure air pressue in milibars.