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

Do antihistamines like benedryl and unisom cause water retention? why?

A doctor has provided 1 answer

No: No they do not.

Answered 7/16/2018

4k views

Thank

Related Questions

A member asked:

What can cause fluid retention? im 57 so its not hormones plus ive had a hysterectomy yrs ago.can benadryl cause you to do that? i have allergies

8 doctors weighed in across 2 answers

A member asked:

How to fix urinary retention (frequent urination) caused by nightly Benadryl use. How long after stopping to see results? Any suggestions to help

A doctor has provided 1 answer

A member asked:

Can allergies make you swell up and retain water? I notice when i take Claritin it lasts longer than Benadryl (diphenhydramine) and im not retaining fluids as much

A doctor has provided 1 answer

A member asked:

Cheeks flush red and hot. Only had coffee and water. Headache. Eyes hurt. Took a Benadryl, (diphenhydramine) still the same.

3 doctors weighed in across 2 answers

A member asked:

Should i go to the emergency room for increasingly swollen lips from a sunburn on sunday? I've been drinking lots of water, iced, used cucumbers, and took about 3 doses of Benadryl yesterday. They have become increasingly more swollen since yesterday morn

2 doctors weighed in across 2 answers

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:

Can drugs like unisom or Benadryl (diphenhydramine) cause a potassium deficiency?
If Benadryl (diphenhydramine) has same ingredient as unisom why the diff. names. ?
Is it safe to take 2 unisom for sleep instead of just the recommended 1? (They're 25mg doxylamine succinate) 1 doesn't work for me. Tried Benadryl (diphenhydramine) too
What do I do? I've taken benadryl, (diphenhydramine) unisom, & pamprin? Is there serious side effects?
Took 50mg of Benadryl 3 hours ago & took 50mg Unisom 45 minutes ago. I also took 50mg of Zoloft. Will I be okay?

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.