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Diphenhydramine as an Adjunct to Moderate Sedation for Procedural First Trimester Abortions

RECRUITINGPhase 4Sponsored by University of Rochester
Actively Recruiting
PhasePhase 4
SponsorUniversity of Rochester
Started2026-06-29
Est. completion2027-02
Eligibility
Age18 Years+
SexFEMALE
Healthy vol.Accepted
Locations1 site

Summary

This single center, double blind, randomized controlled trial will evaluate whether adding intravenous diphenhydramine to a standard moderate sedation regimen improves pain control during first trimester procedural abortion. Participants undergoing uterine aspiration at less than 13 weeks gestation will be randomized 1 to 1 to receive standard moderate sedation with midazolam and fentanyl plus either diphenhydramine 50 mg intravenously or matching placebo. The primary outcome is participant reported pain during uterine aspiration measured by a 100 mm Visual Analog Scale.

Eligibility

Age: 18 Years+Sex: FEMALEHealthy volunteers accepted
Inclusion Criteria:

* Adults age 18 years and older
* Desire procedural abortion with moderate sedation
* Gestational age less than or equal to 13 weeks
* Intrauterine pregnancy or pregnancy of unknown location
* Body mass index less than or equal to 40

Exclusion Criteria:

* Desire medical abortion or desire to continue pregnancy
* Gestational age greater than 13 weeks
* Body mass index greater than 40
* Age younger than 18 years
* Confirmed ectopic pregnancy
* Medical condition that is a contraindication to moderate sedation as determined by the treating clinician

Conditions3

AbortionAnxietyPain

Interventions1

Locations1 site

Gender Wellness OB/GYN
Rochester, New York, 14642

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Trial data from ClinicalTrials.gov. Trial status and eligibility can change — verify directly with the study contact or on ClinicalTrials.gov.

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