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If used properly with hyperventilation, oxygen inhalation therapy is nearly as fast as subcutaneous triptan injections. It has no adverse side effects and again using the procedure of hyperventilating with room air at forced vital capacity tidal volumes for 30 seconds followed immediately by inhaling a lungful of 100% oxygen and holding it for 30 seconds then repeating this sequence until the CH pain is completely gone usually takes an average of seven cycles - 7 minutes consuming less than 30 liters of oxygen , ~5 cents worth of oxygen gas/abort.