Acetazolamide

Acetazolamide, sold under the trade name Diamox, is a diuretic.

Uses

General

Acetazolamide is often used in the treatment of various diseases. For glaucoma sufferers, the drug decreases fluid formation in the eye resulting in lower intraocular pressure. In epilepsy, its main use is in absence seizures, with some benefit in other seizure syndromes. It is also used to decrease generation of cerebrospinal fluid in benign intracranial hypertension and has also shown efficacy in autosomal dominant hyperkalemic periodic paralysis. It has also been demonstrated in drug trials to relieve symptoms associated with dural ectasia in indivduals with Marfan Syndrome.^[1]

Acute mountain sickness

Acetazolamide is best taken prophylactically, anywhere between 125 milligrams (mg) to 500 mg per day, starting a few days before going to the higher altitude. The drug forces the kidneys to excrete carbonic acid. By increasing the amount of bicarbonate excreted in the urine, the blood becomes more acidic. Acidifying the blood stimulates ventilation, which is beneficial during acclimatization. Others only take it when symptoms begin to appear so they can tell whether the drug really has any benefits for them. Whereas some people have reported that it relieves mild cases of acute mountain sickness, it is best taken prophylactically.

Note that acetazolamide is not an immediate fix for acute mountain sickness; it speeds up acclimatization which in turn helps to relieve symptoms. This may take up to a day or two, and requires waiting without any further rapid ascent. It is often advisable to descend if even mild acute mountain sickness is experienced. If serious sickness is encountered, descent is considered mandatory unless other circumstances present greater danger.

Side-effects

Common dehydration and headaches. Acetazolamide prolongs the effects of amphetamines and related drugs.

Contraindications

Acetazolamide should not be taken by individuals if:

• They have sickle cell anemia
• They are allergic to sulfa medications
• They are allergic to any carbonic anhydrase inhibitor
• They have liver or kidney disease
• They have adrenal gland failure (i.e. Addison's disease)
• They have diabetes
• They are pregnant or nursing mothers

References

• Houston, Charles S. (2005). Going Higher: Oxygen Man and Mountains. Seattle, WA: Mountaineers Books. ISBN 0 89886 631 6. 
• Griffen, H. Winter (1989). Complete Guide to Prescription & Non-Prescription Drugs. Putnam Adult. ISBN 0 89586 754 0. 
• Dietz T.E. (29 Jan 2006). An Altitude Tutorial. International Society for Mountain Medicine. Retrieved on 2007-11-15.
• Diamox - Quoted from the Physician's Desk Reference 1993. Climber.org. Retrieved on 2007-11-15.

• Ferrer S, Borras J, Martin-Gil J, Martín-Gil FJ.(1989). "Thermal studies on sulfonamide derivative complexes .1. Thermal-behavior of Acetazolamide – Copper complexes". Thermochim Acta, 147(2):321-330.

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