A member asked:

What is the highest dosage of antihistamine that one person can take at one time?

7 doctors weighed in across 2 answers
Dr. Michael P Vaughn answered

Specializes in Allergy and Immunology

Antihistamines: Safety of high dose medications is often unknown. Our experience comes from case reports of persons who intentionally or accidentally consumed unusually excessive quantities. When Claritin (loratadine) was first investigated, safety studies were done at 40 mg (4 times the current recommended dose). We take 10 mg because effectiveness is not significantly different between 10 mg and 40mg.

Answered 6/6/2019


Dr. Jack Mutnick answered

Specializes in Allergy and Immunology

Antihistamine: Follow the instructions on the bottle unless your physician has directed you otherwise. Depending on the illness, antihistamines can be used at higher doses but only under a doctors recommendation.

Answered 10/18/2020



Related Questions

A member asked:

What is the best time to take an antihistamine?

A doctor has provided 1 answer

Online Primary Care Doctors Accepting New Patients

$44 video appointments available today with a membership as low as $15/month

Book a Video Appointment
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

Meet your new favorite doctor