Can acetabula midge used to treat after symptoms of acute mountain sic

Can acetabula midge used to treat after symptoms of acute mountain sickness appears

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acetazolamide "acute mountain sickness" treatment

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Acetazolamide for Acute Mountain Sickness (AMS) - After Symptoms Appear

I believe you're asking about acetazolamide (the query appears to be a voice-to-text distortion of the drug name). Yes - acetazolamide can be used for treatment after AMS symptoms appear, not just for prevention.

What is Acetazolamide?

Acetazolamide is a carbonic anhydrase inhibitor that induces a mild metabolic acidosis, which indirectly stimulates respiration via peripheral and medullary chemoreceptors. This increased ventilation helps counteract the hypoventilation that underlies altitude illness. Its FDA-approved indications explicitly include AMS for both prophylaxis AND adjunctive treatment.

Fishman's Pulmonary Diseases and Disorders, p. 675

For Treatment (After Symptoms Appear)

Once AMS symptoms have developed, acetazolamide is used at a higher dose than prevention:

Role	Dose	Route
Treatment of AMS	250 mg twice daily	Oral
Prevention (prophylaxis)	62.5-125 mg twice daily	Oral
Pediatric treatment	2.5 mg/kg every 12 hr	Oral

For less severe symptomatic AMS, acetazolamide (250 mg twice daily) or dexamethasone (4 mg every 6 hours) are both effective options.

Goldman-Cecil Medicine, p. 1465

Important Hierarchy: Symptom Severity Matters

The treatment approach depends on how severe the symptoms are:

Life-threatening symptoms (high-altitude pulmonary edema / HACE):
- Immediate descent is the best treatment
- Supplemental oxygen
- Portable hyperbaric chamber if needed
- Acetazolamide is adjunctive here, not first-line
Moderate/less severe AMS symptoms:
- Acetazolamide 250 mg twice daily - appropriate first-line treatment
- OR dexamethasone 4 mg every 6 hours
Mild AMS (e.g., headache only):
- NSAIDs (ibuprofen, aspirin), acetaminophen are sufficient
- Acetazolamide is still appropriate but may be more than necessary

Goldman-Cecil Medicine, pp. 1463-1465

Why It Works (Mechanism)

Acetazolamide inhibits carbonic anhydrase, causing:

Bicarbonate wasting in the kidney → mild metabolic acidosis
The acidosis directly stimulates chemoreceptors → increases respiratory rate and depth
Better ventilation → improved oxygenation at altitude
Also may increase cerebral blood flow independently

Side Effects to Know

Peripheral tingling/numbness (paresthesias - very common)
Polyuria (diuresis)
Drowsiness
Hypokalemia
GI upset
Contraindicated in sulfa allergy (sulfonamide derivative)

Summary

Yes, acetazolamide can and should be used after AMS symptoms appear, at 250 mg orally twice daily. It is FDA-approved for both prevention and treatment of AMS. However, if symptoms are severe (pulmonary edema, cerebral edema, altered consciousness), immediate descent takes priority over any medication.

Recent network meta-analyses (PMID 34758521, PMID 40383249) continue to support acetazolamide's effectiveness for altitude sickness management, consistent with longstanding guideline recommendations.

Symptoms and how to detect acute mountain sickness

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Acute Mountain Sickness (AMS): Symptoms and Detection

What is AMS?

AMS is the most common form of acute altitude illness, affecting 22-50% of travelers to altitudes between 1,850-4,240 m (6,000-14,000 ft). At popular trekking routes like Mount Kilimanjaro, rates as high as 70% have been reported with rapid ascent. It results from hypoxia triggering a series of pathophysiologic responses - primarily cerebral vasodilation and early cerebral edema.

Murray & Nadel's Respiratory Medicine, p. 3630
Guyton & Hall Medical Physiology, p. 3785

Symptoms

Cardinal (Required) Symptom

Headache is the hallmark symptom and is required for diagnosis under the Lake Louise Criteria. It is typically:

Bitemporal (both sides of the forehead/temples)
Throbbing in character
Worse at night, on awakening, or when suddenly standing upright

Associated Symptoms (at least 1 required alongside headache)

Symptom	Description
Gastrointestinal	Anorexia (loss of appetite), nausea, vomiting
Fatigue / weakness	Lassitude, feeling drained, inability to exert
Dizziness / lightheadedness	May range from mild to near-fainting
Sleep disturbance	Frequent waking, periodic (Cheyne-Stokes) breathing at night

Note: Sleep disturbance was previously a formal criterion but was removed from the revised Lake Louise Score after studies showed it was not closely correlated with true AMS.

Rosen's Emergency Medicine, p. 419
Murray & Nadel's, p. 3632-3633

Physical Signs (generally few)

AMS is largely a clinical/subjective diagnosis - there are no pathognomonic physical findings. However, some patients may show:

Mildly elevated body temperature
Crackles on lung auscultation (early)
Peripheral edema
Lower oxygen saturation (SpO2) compared to healthy individuals at the same altitude - though AMS can still occur with normal SpO2

Time Course

Timepoint	What Happens
Immediately on arrival	No symptoms yet
6-10 hours after ascent	Symptoms begin to appear
Within 12 hours	~65% of those who develop AMS will have symptoms
12-36 hours	Remaining ~34% develop symptoms
24-48 hours	Symptoms at maximum severity
3-4 days	Most become symptom-free as the body acclimatizes
After 36 hours	Onset after this point is uncommon - consider alternative diagnoses

Murray & Nadel's, p. 3640-3644

How to Detect AMS: The Lake Louise Score (LLS)

The standard clinical tool is the Lake Louise Acute Mountain Sickness Self-Questionnaire - a scored checklist the patient fills out themselves.

Symptom	Score
Headache: None=0 / Mild=1 / Moderate=2 / Severe/incapacitating=3	0-3
GI symptoms: None=0 / Poor appetite or nausea=1 / Moderate nausea or vomiting=2 / Severe nausea+vomiting=3	0-3
Fatigue/weakness: None=0 / Mild=1 / Moderate=2 / Severe=3	0-3
Dizziness: None=0 / Mild=1 / Moderate=2 / Severely lightheaded/fainting=3	0-3
Sleep: Slept well=0 / Not as well as usual=1 / Woke many times=2 / Could not sleep at all=3	0-3

Diagnosis requires: headache + at least 1 other symptom above

Total Score	Severity
2-4	Mild AMS
5-9	Moderate AMS
10-15	Severe AMS

Tintinalli's Emergency Medicine, Table 216-2

Warning Signs: When AMS is Progressing to Something Worse

Two dangerous complications must be recognized immediately:

1. High-Altitude Cerebral Edema (HACE)

Ataxia (loss of coordination - cannot walk a straight line)
Altered mental status (confusion, disorientation, drowsiness)
These mandate immediate descent - do NOT wait

2. High-Altitude Pulmonary Edema (HAPE)

Dyspnea at rest (shortness of breath even when not moving)
Dry cough progressing to productive/frothy cough
Note: Dyspnea on exertion alone is normal at altitude and does not indicate HAPE
Rosen's Emergency Medicine, p. 437-439

Differential Diagnoses to Rule Out

Because AMS symptoms are nonspecific, the following must be considered:

Dehydration
Hypothermia
Hyponatremia
Exhaustion
Acute carbon monoxide poisoning (common in poorly ventilated high-altitude shelters with stoves/generators - especially dangerous as hypoxia worsens CO toxicity)
Alcohol hangover
CNS infection (meningitis)

Any focal neurologic sign, ataxia, or confusion should be treated as HACE or another serious cause until proven otherwise.

Murray & Nadel's, p. 3638

Key Diagnostic Principle

AMS is a clinical diagnosis. There are no confirmatory laboratory tests. The diagnosis rests entirely on history and symptom scoring in the right setting (recent ascent above ~2,400 m / 8,000 ft). A normal neurologic exam and normal mental status distinguish AMS from the more dangerous HACE.

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