Clinical trial NCT05669885: Hypersensitivity to Phosphodiesterase 5 Inhibition in Post-Traumatic Headache
Official title: Hypersensitivity to Phosphodiesterase 5 Inhibition in Post-Traumatic Headache: A Randomized Clinical Trial
Study type: INTERVENTIONAL
Overall status: UNKNOWN
Phase: NA
Conditions: Post-Traumatic Headache
Lead sponsor: Danish Headache Center
Sponsor class: OTHER
First posted: 2023-01-03
Enrollment: 21
Sex: ALL
Minimum age (years): 18
Maximum age (years): 65
Standard ages: ADULT
OLDER_ADULT
Accepts healthy volunteers: no
Allocation: RANDOMIZED
Intervention model: CROSSOVER
Primary purpose: BASIC_SCIENCE

Brief summary: To investigate whether sildenafil (phosphodiesterase 5 inhibitor) induces migraine-like headache in people with persistent post-traumatic headache (PTH) attributed to mild traumatic brain injury (mTBI).


Eligibility criteria: Inclusion Criteria:

* Age 18 to 65 years of age upon entry into screening
* History of persistent headache attributed to mild traumatic injury to the head for ≥ 12 months and in accordance with the International Classification of Headache Disorders, 3rd Edition (ICHD-3)
* ≥ 4 monthly headache days on average across the 3 months prior to screening
* Provision of informed consent prior to initiation of any study-specific activities/procedures

Exclusion Criteria:

* \> 1 mild traumatic injury to the head
* History of any primary or secondary headache disorder prior to mild traumatic injury to the head (except for infrequent episodic tension-type headache)
* History of moderate or severe injury to the head
* History of whiplash injury
* History of craniotomy
* History or evidence of any other clinically significant disorder, condition or disease (except for those outlined above) than, in the opinion of the site investigator, would pose a risk to subject safety or interfere with study evaluation, procedures or completion
* The subject is at risk of self-harm or harm to others as evidenced by past suicidal behavior
* Female subjects of childbearing potential with a positive pregnancy test during any study visit
* Cardiovascular disease of any kind, including cerebrovascular diseases
* Hypertension (systolic blood pressure of ≥150 mmHg and/or diastolic blood pressure of ≥100 mmHg) prior to the start of infusion on the experimental day
* Hypotension (systolic blood pressure of ≤90 mmHg and/or diastolic blood pressure of ≤50 mmHg)
* Initiation, discontinuation, or change of dosing of prophylactic medications within 2 months prior to study inclusion
* Intake of acute medications (e.g. analgesics, triptans) within 48 hours of infusion start
* Baseline headache intensity of \>3 on an 11-point numeric rating scale (0 being no headache, 10 being the worst imaginable headache)
* Baseline headache with migraine-like features or self-reported baseline headache that mimics the subjects' usual headache with migraine-like features

Primary outcomes:
measure: Incidence of Migraine-Like Headache
timeFrame: 12 Hours
Secondary outcomes:
measure: Headache Intensity Scores
timeFrame: 12 Hours
Other outcomes:
Locations:
city: Copenhagen
country: Denmark
facility: Danish Headache Center
Study officials:
References: