Skip to content

Study · Randomized controlled trial · n = 12 · 2006

10 results

Vasoactive intestinal polypeptide evokes only a minimal headache in healthy volunteers.

Hansen JM, Sitarz J, Birk S, Rahmann AM, Oturai PS, Fahrenkrug J, Olesen J, Ashina M

Cephalalgia : an international journal of headache1 Aug 2006Cited by 77 (Europe PMC)

Summary

The text of this summary is not shown here, because the article license does not allow reuse. Read it at the source (opens in a new tab)

Text rights: Publisher copyright. Results still quote short attributed sentences.

Results from this study10

10 results from studies that gave the peptide. 10 results from people.

  1. 01HumanRandomized controlled trialSafety outcome

    In healthy volunteers, headache was very mild (maximum score 2); five participants had headache during VIP infusion and one during placebo.

    In plain wordsIn healthy volunteers, VIP infusion caused only a very mild headache: five people had one with VIP and one with placebo.

    Outcome
    IncreaseHeadache during VIP infusion
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Pain · Nervous system and cognition
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Measurements

    Maximum headache score
    2 0-10 scale
    VIP

    Source sentences

    Summary
    Five participants developed headache during VIP and one during placebo.
    2 context sentences
    Summary · context
    The headache was very mild with a maximum score of 2 and described as a pressing or throbbing sensation.
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  2. 02HumanRandomized controlled trialMechanism

    In healthy volunteers, VIP caused a significant drop in mean flow velocity in the middle cerebral artery during infusion compared with placebo.

    In plain wordsIn healthy volunteers, VIP slowed blood flow in a main brain artery during the infusion, compared with placebo.

    Outcome
    DecreaseMean flow velocity in the middle cerebral artery during infusion
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Cerebral blood flow · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    a significant drop in V(meanMCA) was seen for VIP compared with placebo (P < 0.001)
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  3. 03HumanRandomized controlled trialMechanism

    In healthy volunteers, the VIP effect on middle cerebral artery flow velocity waned quickly, with no difference from placebo between 30 and 120 minutes.

    In plain wordsIn healthy volunteers, the VIP effect on brain artery blood flow faded quickly and did not differ from placebo after 30 minutes.

    Outcome
    No significant changeMean flow velocity in the middle cerebral artery, 30 to 120 min
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Cerebral blood flow · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    but the effect quickly waned and no difference was found when comparing the time between 30 and 120 min.
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  4. 04HumanRandomized controlled trialMechanism

    In healthy volunteers, VIP caused no significant difference in the diameter of the middle cerebral artery during infusion.

    In plain wordsIn healthy volunteers, VIP did not change the width of a main brain artery during infusion.

    Outcome
    No significant changeMiddle cerebral artery diameter
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Cerebral blood flow · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    In addition, no significant difference in the diameter of the MCA could be found during the infusion.
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  5. 05HumanRandomized controlled trialMechanism

    In healthy volunteers, regional cerebral blood flow did not differ significantly between VIP and placebo.

    In plain wordsIn healthy volunteers, VIP did not change blood flow in the brain compared with placebo.

    Outcome
    No significant changeRegional cerebral blood flow
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Cerebral blood flow · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    No significant differences in rCBF (P = 0.10) were found between VIP and placebo.
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  6. 06HumanRandomized controlled trialMechanism

    In healthy volunteers, VIP caused a marked dilation of the superficial temporal artery in the first 30 minutes of infusion.

    In plain wordsIn healthy volunteers, VIP widened an artery in the temple during the first 30 minutes, compared with placebo.

    Outcome
    IncreaseSuperficial temporal artery dilation, first 30 min
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Cerebral blood flow · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    A marked dilation of the superficial temporal artery was seen (P = 0.04) after VIP in the first 30 min
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  7. 07HumanRandomized controlled trialMechanism

    In healthy volunteers, the VIP effect on superficial temporal artery dilation did not differ from placebo between 30 and 120 minutes.

    In plain wordsIn healthy volunteers, the VIP effect on an artery in the temple was no longer different from placebo after 30 minutes.

    Outcome
    No significant changeSuperficial temporal artery dilation, 30 to 120 min
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Cerebral blood flow · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    but no difference was found when comparing the time between 30 and 120 min.
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  8. 08HumanRandomized controlled trialSafety outcome

    In healthy volunteers, mean arterial blood pressure did not differ between VIP and placebo days.

    In plain wordsIn healthy volunteers, VIP did not change blood pressure compared with placebo.

    Outcome
    No significant changeMean arterial blood pressure
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Blood pressure · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    We found no difference in mean arterial blood pressure between VIP and placebo days
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  9. 09HumanRandomized controlled trialSafety outcome

    In healthy volunteers, heart rate increased significantly on the VIP day compared with the placebo day.

    In plain wordsIn healthy volunteers, VIP raised the heart rate compared with placebo.

    Outcome
    IncreaseHeart rate
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Heart function · Cardiovascular
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    the heart rate increased significantly on a VIP day compared with a placebo day (AUC(0-30 min), P < 0.001).
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.
  10. 10HumanRandomized controlled trialPharmacokinetics

    In healthy volunteers, plasma VIP was significantly higher on the VIP day than on the placebo day.

    In plain wordsIn healthy volunteers, VIP levels in blood were higher after the VIP infusion than after placebo.

    Outcome
    IncreasePlasma VIP concentration
    Study

    n = 12

    Comparator
    Placebo
    Outcome group
    Pharmacokinetics · Pharmacology
    Studied dose
    8 pmol/kg per min · infusion · 25 minAs given in this study (human).

    Source sentences

    Summary
    Plasma VIP was significantly higher on a VIP day compared with placebo (AUC(0-80 min), P < 0.001).
    1 context sentence
    Summary · context
    VIP (8 pmol/kg per min) or placebo (0.9% saline) was infused for 25 min into 12 healthy young volunteers in a crossover, double-blind design.

AI wrote and checked these results. AI can make mistakes, so check important results against the source.

Version history

PepBank keeps every version of the data on this study. Status changes from Retraction Watch, Europe PMC and Crossref are listed with their source.

  1. Version 2Current

    9 Oct 2026, 19:08 UTC

    Study results updated

  2. Version 1

    9 Oct 2026, 12:41 UTC

    First added · source update from Europe PMC

Subjects

Terms as the source lists them.

PepBank is a research reference. Talk to a doctor before you use any peptide.