HomeConditionsAltitude Sickness

Altitude Sickness

Altitude sickness, also known as acute mountain sickness (AMS), occurs at high altitudes when individuals ascend too quickly. Symptoms include headache, dizziness, nausea, and shortness of breath. Gradual ascent, hydration, and rest can help prevent and alleviate symptoms. Immediate medical attention is necessary for severe cases.

Best medications for Altitude Sickness

Drug NameClassRouteStandard DosagePrice
acetaZOLAMIDE SodiumCarbonic Anhydrase InhibitorsInjection500 MGfrom$10.43
acetaZOLAMIDECarbonic Anhydrase InhibitorsOral500, 250, 125 MGfrom$10.43
acetaZOLAMIDE ERCarbonic Anhydrase InhibitorsOral500 MGfrom$16.87

What is Altitude Sickness?

Altitude sickness, also known as acute mountain sickness (AMS), is a condition that occurs when individuals ascend to high altitudes, typically above 8,000 feet (2,400 meters) above sea level, too quickly. It is a common health concern for individuals who travel to high-altitude destinations for recreational activities such as mountaineering, hiking, or skiing.


The symptoms of altitude sickness can vary in severity and onset time. Common symptoms include headache, dizziness, nausea, loss of appetite, fatigue, insomnia, and shortness of breath. These symptoms can begin within a few hours or days after arriving at high altitude. In severe cases, altitude sickness can lead to more serious complications such as high-altitude cerebral edema (HACE) or high-altitude pulmonary edema (HAPE), which require immediate medical attention.


The primary cause of altitude sickness is the reduced air pressure and lower oxygen levels found at higher altitudes. When individuals ascend too rapidly, their bodies do not have enough time to acclimate and adjust to the changing atmospheric conditions. This can result in a decreased oxygen supply to the body's tissues, leading to the symptoms associated with altitude sickness.

Individuals differ in their susceptibility to altitude sickness. Factors that can increase the risk include a previous history of altitude sickness, rapid ascent to high altitude, exertion at high altitude, certain medical conditions, and genetic predisposition.


Preventing altitude sickness involves gradual ascent to high altitudes, allowing the body sufficient time to acclimate. Some general prevention tips include:

  • Ascending slowly: When traveling to high altitude, it is recommended to ascend no more than 1,000 to 1,500 feet (305 to 457 meters) per day once above 8,000 feet (2,400 meters).

  • Staying hydrated: Drinking plenty of fluids helps compensate for increased fluid loss at high altitudes.

  • Avoiding alcohol and sedatives: These substances can further impair the body's ability to acclimate to high altitude.

  • Eating a balanced diet: Consuming a diet rich in carbohydrates and low in fat can help maintain energy levels and aid in acclimatization.

  • Taking medication: Certain medications, such as acetazolamide, may be prescribed to help prevent altitude sickness in some individuals.


If symptoms of altitude sickness develop, it is important to take immediate action. The following steps can help alleviate symptoms:

  • Descend to a lower altitude: Moving to a lower elevation allows the body to access more oxygen.

  • Rest: Taking a break and allowing the body to rest can help alleviate symptoms.

  • Hydration: Drinking plenty of fluids aids in symptom relief.

  • Medication: Over-the-counter pain relievers can alleviate headache symptoms. Portable hyperbaric chambers may also be used in severe cases of altitude sickness.

If symptoms worsen or persist despite these measures, immediate medical attention should be sought.


Altitude sickness is a common condition that can affect individuals traveling to high-altitude destinations. Taking preventive measures and recognizing the early symptoms of altitude