HealthTap Online Primary Care Doctors Accepting New Patients
Book a video visit
HealthTap
Telehealth
A member asked:

Can the antibiotic "bactrim" affect my birth control pills in any way?

A doctor has provided 1 answer
Dr. David Krulak answered

Specializes in Family Medicine

Bactrim (sulfamethoxazole and trimethoprim): This medication may actually increase plasma levels of ethinyl estradiol, the medicine found in many contraceptives.

Answered 7/12/2014

3.9k views

Thank

Related Questions

A member asked:

I took bactrim (sulfamethoxazole and trimethoprim) once literally one pill while on birth control and had unprotected sex that day what are the chances of me getting pregnant?

A doctor has provided 1 answer

A member asked:

Will bactrim (sulfamethoxazole and trimethoprim) ds interfere with birth control?

A doctor has provided 1 answer

A member asked:

Could bactrim (sulfamethoxazole and trimethoprim) affect birth control when taken on off week?

A doctor has provided 1 answer

A member asked:

Does bactrim (sulfamethoxazole and trimethoprim) decrease the effectiveness of quartette birth control?

2 doctors weighed in across 2 answers

A member asked:

I was on the last week of my pills taking quartette, on antibiotics of bactrim (sulfamethoxazole and trimethoprim) and had sex that Saturday of my last week. I took Plan B that monday?

A doctor has provided 1 answer

Sponsored Content
HealthTap Medical Group does not endorse products or services. Sponsored content revenues support our mission to make health information free and accessible to all.Learn more

People also searched for:

Is it actually true that bactrim (sulfamethoxazole and trimethoprim) antibiotic will interfere with provera birth control pill?
Can sulfa antibiotics ie. Bactrim (sulfamethoxazole and trimethoprim) affect oral birth control?
How long must you wait to have sex after taking an antibiotic (BACTRIM) while on the depo-provera birth control shot ?
Will bactrim (sulfamethoxazole and trimethoprim) affect my birth control pills?
Should I take a Plan B pill if I had unprotected sex 3 days after stopping Bactrim (sulfamethoxazole and trimethoprim). I've been on the birth control Viorele for 4 months.

Telemedicine

Primary Care
Manage Your Conditions
Women's Health
Children's Health
Men's Health
Senior Health
Wellness, Prevention & Lifestyle
Sexual Health
Mental & Behavioral Health
Travel Medicine
Urgent Care
Ask your question
Didn't find what you're looking for?

90,000 U.S. doctors in 147 specialties are here to answer your questions or offer you advice, prescriptions, and more.

Ask your question

More of what we treat

Allergies
Antibiotics
Asthma
High Blood Pressure
Prescriptions
Type 2 Diabetes
Content on HealthTap (including answers) should not be used for medical advice, diagnosis, or treatment, and interactions on HealthTap do not create a doctor-patient relationship. Never disregard or delay professional medical advice in person because of anything on HealthTap. Call your doctor or 911 if you think you may have a medical emergency.
HealthTap
HIPAA logo
HIPAASecure
Soc 2 Type 2 logo
SOC 2 Type 2Certified
JCAHO Accredited
JCAHOAccredited
Member App

Download HealthTap

Video visit and message your doctor

Member App QR Code
Play Store Member LinkApp Store Member Link

Questions?

+1 (888) 828-0841support@healthtap.com
LinkedInTwitter
HomeTermsPrivacyCookiesDMCAHealth TopicsDoctors DirectoryDoctor Q&A by Specialty
Copyright 2026 HealthTap, Inc.