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

Im pregnant with severe nausea.i have been taking 16mg zofran (ondansetron) at once..is that ok.my doc said its fine, but im double checking?

A doctor has provided 1 answer
Dr. Brian Nguyen answered

Specializes in Obstetrics and Gynecology

Appropriate but...: Taking this much at once is not unheard of but should not be done often. I regularly prescribe 4-8mg and if that doesn't work then try a different drug. Most doctors only use 16mg when preparing patients for surgical nausea and vomiting.

Answered 3/27/2014

4.3k views

Thank

Related Questions

A member asked:

My OB gave Zofran (ondansetron) while pregnant diff doc told me to stop immediately due to its uses for chemo& can cause defects How@risk am I im 12wks used 13pills?

A doctor has provided 1 answer

A member asked:

It's there anything my DR can give me for nausea during pregnancy? I had zofran (ondansetron) with first pregnancy bc I was in the er every weekend dehydrated

A doctor has provided 1 answer

A member asked:

8weeks pregnant. Nausea is worse. Feel food is in throat. Can only eat a few bites and vomit. History of hesitant les. Should i try Zofran (ondansetron) or else?

A doctor has provided 1 answer

A member asked:

8 weeks pregnant. Feel food is in my throat. Eat only a few bites. History of hesitant les. What to do? Try Zofran (ondansetron) that doc prescribes or else?

2 doctors weighed in across 2 answers

A member asked:

My face swells after taking ondansetron and my doc says im allergic to all anti nausea drugs now, is that right? Was it just a side affect?

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:

Taking Zofran (ondansetron) odt for nausea. Doc said i could double 4mg tablets. I took 2 tablets 4 hours ago is it okay take another dose?
I have a cough, bad nausea and fever. My doc gave me Zofran (ondansetron) 4mg 3x day. 4 isn't enough anymore can I double the dose or is that not safe?
Why isn't Zofran (ondansetron) working for extremely severe nausea/vomiting caused by extreme anxiety disorder? Shouldn't it work? Doc did prescribe it for that...
Can use of vaginal progestrone cause nausea and vomiting in pregnancy when already suffering from severe morning sickness compelling to take zofran (ondansetron)?
Ben havin excess nausea an vomitin goin on 4 yrs.Gastro an primary doc said only 2 meds 4 dis. Zofran (ondansetron) an Phernergan.u know of n e more n dis state NC?

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.