Clinical trial Recruiting at 1 site Phase 4 Interventional Ages 18 to 89

Simethicone to reduce gas pain after foregut and bariatric surgery

Official title: Simethicone as Part of an Enhanced Recovery After Surgery (ERAS) Protocol

Run by Madigan Army Medical Center · NCT06812832 · Data updated 2026-11-12

This trial will test whether simethicone (Gas-X) reduces gas pain and bloating in adults having foregut operations such as sleeve gastrectomy or gastric bypass.

More Bariatric Surgery trials

Quick facts

PhasePhase 4
Study typeInterventional
Ages18 Years to 89 Years
SexAll
Enrollment260 (estimated)
SponsorMadigan Army Medical Center
Federal
Locations1 site (Tacoma, Washington)
StatusRecruiting
StartedApril 8, 2025
Main results expectedMarch 2028
Study endsMarch 2029
Registry record updatedJune 15, 2025
Trial IDNCT06812832 on ClinicalTrials.gov

Is this trial a fit for you?

Likely a good fit

Adults scheduled for foregut operations (including sleeve gastrectomy, Roux-en-Y gastric bypass, hiatal hernia, or other gastric surgery) who are not pregnant and do not have a simethicone allergy are eligible.

Probably not a fit

Patients having non-foregut procedures, minors under 18, pregnant or breastfeeding individuals, or those allergic to simethicone are unlikely to receive benefit from this protocol.

A plain-English reading of the study's rules. Only the study team can confirm whether you qualify.

What this trial studies

This single-center, randomized, placebo-controlled Phase 4 trial enrolls adult patients undergoing foregut procedures at Madigan Army Medical Center. Participants complete a baseline PROMIS Gastrointestinal Gas and Bloating survey, are randomized to receive either simethicone 80 mg or placebo four times daily after surgery, and repeat the PROMIS survey and the APS-POQ-R pain questionnaire 24 hours postoperatively (and daily if admitted longer). The research pharmacist and study statistician are the only unblinded personnel, and all other team members and patients are blinded to allocation. The study is designed to gather safety data and measure symptomatic benefit of simethicone in the immediate postoperative period.

Why it matters

Potential benefit: If successful, patients may have less postoperative gas pain and bloating, leading to greater comfort and an easier early recovery.

How similar studies have gone: Simethicone is an established over-the-counter remedy for gas, but randomized trials specifically targeting postoperative foregut patients are limited, so this application is relatively understudied.

Who can join: the full rules

Show full inclusion / exclusion criteria
Inclusion Criteria:

* Foregut procedures

Exclusion Criteria:

* Non-foregut procedures
* Allergy to simethicone
* Pregnancy or breastfeeding
* Minors under 18 years of age

Where it's running

  • Madigan Army Medical Center
    Tacoma, Washington, United States
    Recruiting

Study contacts

Similar studies

Other studies for the same condition or treatment. Recruiting studies are listed first.

How to take part

  1. Review the eligibility criteria above with your treating physician.
  2. Check the official listing on ClinicalTrials.gov for the latest contact details and recruitment status.
  3. Contact the study coordinator or principal investigator to ask for pre-screening. Pre-screening is free and never obligates you to enroll.
Last reviewed 2026-11-14 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.