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

Do antihistamines weaken the immune system? i'm trying to ward off a cold that's been going around but i also don't want to suffer through hayfever!

A doctor has provided 1 answer
Dr. John Chiu answered

No: The usual antihistamine has no effect on the immune system.

Dr Jeffreys agreed

Answered 4/24/2015

2.9k views

Thank

Related Questions

A member asked:

I get hayfever only in the mornings as soon as i wake up even though i take antihistamine every day. What can I do to stop it from happening?

A doctor has provided 1 answer

A member asked:

Ive had a dry cough for a few days and a normal body temperature. I also have hayfever and my 1-a-day antihistamines help, but dont take the cough away.

A doctor has provided 1 answer

A member asked:

If I get hay fever from mowing the lawn sometimes, is it okay to take an antihistamine after mowing or midway during mowing, or do I have to take it before mowing the lawn and anytime after is pointless?

A doctor has provided 1 answer

A member asked:

Woke up with rash on my stomach under breast its raw and itchy what can cause this taking antihistamines for hayfever allergy ?

A doctor has provided 1 answer

A member asked:

Are there a antihistamine pill, nasal spray and eye drop that i can buy from a chemist that are ok to take together to manage hay fever?

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:

Im experiencing terrible hay fever that a daily antihistamine and nasal sprays are doing nothing for. Its worse at night and in the mornings. ?
Itchy throat eyes nose inner ears for 2 days. No identifiable allergy trigger. In UK so not sure its hayfever? Antihistamines not helping. Worrying?
I have terrible hayfever which affects my daily life. Normal antihistamines don't work - are there any other options?
Please can I take more than one antihistamine a day as I have severed hay fever ? I am on one a day cetrizine hydrochloride tablet but not working
Can i take antihistamines for hay fever after embryo transfer?

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.