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A 36-year-old member asked:

How much benadryl (diphenhydramine) is considered too much?

2 doctor answers4 doctors weighed in
Dr. Steven Machtinger
Allergy and Immunology 45 years experience
1 mg per 2 pounds: For children the correct dose is 1 mg/kg ( a kilogram is 2.2 pounds) every six hours as needed. Adults usually take 25-50 mg per dose. If you or your child need more than that you should consult your physician for advice. There are other drugs that are equally effective but cause less or no sedation and have fewer side-effects than Diphenhydramine (benadryl).
Dr. Jack Mutnick
Allergy and Immunology 18 years experience
Benadryl (diphenhydramine): Either the recommended amount based on weight through the directions on the box or following your doctors recommendations if the recommended dose they made is higher.

Similar questions

A 34-year-old member asked:

What happens if you take too much benadryl (diphenhydramine)?

1 doctor answer2 doctors weighed in
Dr. Stevan Cordas
Internal Medicine 58 years experience
Benadryl (diphenhydramine): It ususally makes you have a dry mouth and get very sleepy.
A 49-year-old member asked:

Is 4 tsp of children's Benadryl (diphenhydramine) too much?

1 doctor answer2 doctors weighed in
Dr. James Ferguson
Pediatrics 47 years experience
Depends: This would be a normal dose for a 110 lb kid.The recommended dose is 1mg/kg.
A 40-year-old member asked:

How much time does it take for Benadryl (diphenhydramine) to wear off?

1 doctor answer1 doctor weighed in
Dr. Marino Tavarez
A Verified Doctoranswered
A US doctor answeredLearn more
Benadryl (diphenhydramine): Is usually active in your system for about 4 hours
A 36-year-old member asked:

What are the side effects of taking too much benadryl (diphenhydramine)?

1 doctor answer2 doctors weighed in
Dr. Lee Perry
Allergy and Immunology 18 years experience
Several: The most common side effect of taking too much Benadryl (diphenhydramine) would be excessive drowsiness. Other possible side effects include dizziness, headache, constipation, urinary retention, and heart palpitations.

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Last updated Aug 6, 2018
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