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.
The pressure setting to achieve this is called QNH or altimeter setting and is available from various sources, including air traffic control and the local METAR-issuing station. The transition altitude (TA) is the altitude above sea level at which aircraft change from the use of altitude to the use of flight levels. When operating at or below the TA, aircraft altimeters are usually set to show the altitude above sea level.