PT  - JOURNAL ARTICLE
AU  - C Carratala
AU  - J G Gea
AU  - M C Aguar
AU  - S Grau
AU  - J M Espadaler-Medina
AU  - J M Broquetas
TI  - Methacholine induced headache.
AID  - 10.1136/thx.50.3.319
DP  - 1995 Mar 01
TA  - Thorax
PG  - 319--319
VI  - 50
IP  - 3
4099  - http://thorax.bmj.com/content/50/3/319.short
4100  - http://thorax.bmj.com/content/50/3/319.full
SO  - Thorax1995 Mar 01; 50
AB  - 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.