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Methacholine induced headache. |
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| Authors: | C Carratala J G Gea M C Aguar S Grau J M Espadaler-Medina J M Broquetas |
| Abstract: | A lung function technician developed episodes of headache, probably related to the use of methacholine. The headache disappeared with breathing 100% oxygen. Cholinergic agents are known to induce headaches but the mechanism remains unclear. Vascular factors could be implicated. |
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