Milam Glacier to Lapthal Expedition AMS Risk Calculator

Resting at Milam (Day 6) is mandatory. Carry portable oximeters and oxygen.

The primary risks on Milam Glacier to Lapthal Expedition are: Severe AMS (15k+ zones), Crossing high-velocity glacial streams, Extreme blizzard potential. Your operator should brief you on each of these before departure.

Diamox (Acetazolamide) is worth discussing with your doctor if you plan to attempt Milam Glacier to Lapthal Expedition (17,500ft). It is not routinely required for healthy trekkers but is recommended if you have had AMS symptoms on a previous high-altitude trip. Never start Diamox without medical advice — it has side effects including tingling fingers and increased urination.

At 5,334m, a resting SpO2 below 80% is a medical emergency and requires immediate descent. Between 80–85% — monitor closely and do not ascend further. Most acclimatized trekkers maintain 85–92% at this altitude. Carry a pulse oximeter and check readings morning and night.

Solo trekking is extremely dangerous. You must rely entirely on local ITBP check-posts for emergencies. Hiring a local guide with an Inner Line Permit is mandatory.