When to Start Taking Altitude Sickness Medication for Maximum Effectiveness
ⓘ Quick Answer Altitude sickness medication such as acetazolamide (Diamox) should be started 24 to 48 hours before ascending above 2,500 metres and continued for at least 48 hours after reaching your target altitude. Kings Pharmacy Birmingham provides expert travel health advice including altitude sickness medication for all high-altitude destinations. For travellers heading to high-altitude …