Headache Provocation of People Who Are Unable to Have Headache

Exclusion Criteria

• •Daily consumption of any medication.
• •Consumption of any medication less than 12 hours prior to the study day.
• •Headache on the study day or 48 hours prior to the study day.
• •Amnestic or clinical signs of hypertension (systolic blood pressure \>150 mmHg and/or diastolic blood pressure \>100 mmHg) or hypotension (systolic blood pressure \<90 mmHg and/or diastolic blood pressure \<50 mmHg).
• •Any severe cardiovascular disease, including cerebrovascular illness.
• •Amnestic or clinical signs of current mental illness.
• •Amnestic or clinical signs of current substance or drug abuse.
• •Amnestic or clinical signs of any illness the responsible doctor considers relevant for participation in the study.