Pill or IV? new study tests which acetaminophen works faster for pelvic pain
NCT ID NCT07595302
First seen Jun 25, 2026 · Last updated Jun 27, 2026 · Updated 1 time
Summary
This study compares intravenous (IV) acetaminophen to oral acetaminophen for treating acute pelvic pain in the emergency department. About 140 women with pelvic pain and a pain score of 4 or higher will be randomly assigned to receive either IV or oral acetaminophen, plus a dummy version of the other. The main goal is to see which method provides better pain relief 30 minutes after treatment.
What this could mean
Our plain-language read of the trial. This is informational only, not medical advice or a prediction.
- Active substance
- acetaminophen (paracetamol)
- What this could lead to
- If IV acetaminophen works faster or better, it could become a standard option for quick pain relief in the ER for pelvic pain.
- What could go wrong
- This is a small, early-phase trial (140 people) comparing two common forms of a well-known drug. The difference may be small or not clinically meaningful.
This is an AI summary of the original study and may miss details. Read our disclaimer.
Study facts
What this study's own registry entry says, in plain language.
- Phase
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Phase 4
Runs after approval, following long-term safety and how well the treatment works in everyday use.
- Participants
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About 140 people
The number the study aims to enrol. It can still change while the study runs.
- Expected to start
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Jul 2026
An estimate. Start dates often move.
- Expected to finish
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Jun 2027
An estimate. End dates often move.
- Lead sponsor
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Other sponsor
The registry's catch-all category, for sponsors it does not file as a company, a government agency, or a research network.
Who can take part
This study's own entry requirements. Only the study team can say for certain whether you qualify.
- Ages
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16 to 50 years
- Sex
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Female participants only
- Healthy volunteers
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Not accepted
This study is not open to healthy volunteers. The entry requirements below say who it is open to.
Show the full entry requirements Hide the full entry requirements
Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.
Inclusion Criteria: * Female sex at birth * Presentation to the Emergency Department (ED) with pelvic pain * Baseline numeric pain score (NRS) ≥4 * Ability to provide informed consent in English or Spanish Exclusion Criteria: * Receipt of any analgesic medication within 2 hours or acetaminophen within 6 hours * Known allergy or intolerance to acetaminophen
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Get notified about this study
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Conditions
The condition(s) this trial relates to.
As listed by the trial registrant
The condition terms exactly as the trial's registrant entered them.
How to take part
Only the study team decides who joins. These are the ways to reach them.
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The places running it
1 site. The list below names each one and where it is.
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The official record
ClinicalTrials.gov lists the study team's own contact details, including names and phone numbers. We don't republish those.
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A doctor treating you
A doctor who knows your case can contact a study site on your behalf, and can tell you whether this study is worth pursuing at all.
Contacts and locations
Locations
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Montefiore Medical Center
The Bronx, New York, 10467, United States
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