Weight loss surgery may weaken birth control pills: new study investigates

NCT ID NCT06345560

Recruiting now Knowledge-focused Sponsor: Chulalongkorn University Source: ClinicalTrials.gov ↗

First seen Jun 24, 2026 · Last updated Jun 27, 2026 · Updated 1 time

Summary

This study examines whether bariatric surgery changes how the body absorbs drospirenone-only birth control pills in obese Thai women. Sixteen women will take the pill before and after surgery, and researchers will measure drug levels in their blood. The goal is to see if the surgery affects the pill's effectiveness, helping guide contraceptive choices for women undergoing weight loss surgery.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: drospirenone (a hormone-only birth control pill)
What this could lead to: If successful, this study could help doctors know if obese women who have bariatric surgery can still rely on drospirenone-only pills for contraception.
What could go wrong: This is a very small, early-phase study (16 people) that only measures drug levels, not actual pregnancy prevention. Results may not apply to other populations or birth control types.

This is an AI summary of the original study and may miss details. Read our disclaimer.

Get updates

Get notified about this study

Sign up to get updates when this study changes or when new studies for CONTRACEPTION are added.

Our safety recommendation!

By submitting, you agree to our Terms of use

Conditions

The condition(s) this trial relates to.

Obesity

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

CONTRACEPTION

Contacts and locations

Locations

Chulalongkorn University
RECRUITING

Bangkok, 10330, Thailand

More trials for these conditions

Other studies related to the condition(s) this trial covers.