1. Ferritin is the major iron storing protein in the body, and Iron is given to treat Iron deficiency Anemia
but low ferritin may also indicate chronic inflammation, hypothyroidism
, vitamin C deficiency
or celiac disease, so check with your Attending Physician regarding baseline Investigations.
2. At high Altitude (mountains/aeroplanes), oxygen is required; so make sure you check with the Flight Attendant in advance for oxygen mask, and secondly may cause symptoms of "Restless Leg Syndrome".
PS: Your Neurologist
can help with prescribing medicines for 4 hour flight.