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Table 2 Side effects

From: Oxygen treatment for cluster headache attacks at different flow rates: a double-blind, randomized, crossover study

Side effects 7 L / min (n) 12 L /min (n)
Lightheadedness 10 11
Dry mouth 5 6
Tired after treatment 2 2
Difficulty breathinga 2 1
Nasal congestion 1 1
Coughing 1 1
Difficulty sleeping after treatment 0 2
Nausea 1 1
Hoarse voice 0 1
Tingling 1 0
Burning eyes 1 0
Cold feeling 1 0
Blurry vision 0 1
  1. aSeverity not specified, both patients were able to continue treatment