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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