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

How long will it take to faint from dehydration?

A doctor has provided 1 answer
Dr. Rick Koch answered

Variable: Fainting generally only occurs in the most severe cases of dehydration.

Dr Hickerson agreed

Answered 9/7/2019

5.6k views

Thank

Related Questions

A member asked:

Drank 4pts beer last night and feel especially ill. Diarrhea, vomiting, hot and cold sweats, faintness. What can I take to alleviate symptoms/recover?

A doctor has provided 1 answer

A member asked:

My husband is feeling weak, like about to faint, dehydrated and sore?

A doctor has provided 1 answer

A member asked:

I often get severely dehydrated and feel dizzy/faint but I haven't died or fainted or been hospital, how do I survive so well? I even exercise in heat

A doctor has provided 1 answer

A member asked:

I've been dehydrated, increased urination, and feel way too hot since starting beta blockers. Can't retain any fluids, and will get faint if not guzzling water/Gatorade. What does this sound like?

2 doctors weighed in across 2 answers

A member asked:

I took Adderall 25mg and my heart rate is higher than usual but not by much but also I sometimes feel dizzy and really week for a brief moment like I'm going to faint. and I know I'm not dehydrated cause my pee is clear. my mom thinks its nothing?

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:

How can I faint from dehydration in hours of drinking?
Can dehydration cause you to feel faint after you ate too fast & to feel lightheaded? How about if your low on a nutrition?
Years ago I had bloodwork done & felt very faint/ill. Tmrw I'm getting some done due to possible poor circulation & dehydration issues...will I be ok?
If you become hypotensive from dehydration with all the symptoms but don't faint, could this cause brain damage?
On 90mg cymbalta (duloxetine) a day , i'm switching to lexapro.Dr said to take 60mg cymbalta (duloxetine) and 20 mg lexapro a day for a week.Is this ok? I feel faint/bad !how relieve faintness? Is serotonin syndrome a concern?

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.