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Doctor insights on: Antihistamines Dosage

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Is it ok to take Clorazepate with an antihistamine? The dosage is 3.75mg.

Is it ok to take Clorazepate with an antihistamine? The dosage is 3.75mg.

Watch for drowsiness: The combination can cause increased drowsiness. Please do not drive while taking both. Avoid the use of alcohol in combination. The clorazepate can be habit forming. ...Read more

Benadryl (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...Read more


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

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

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 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. ...Read more

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What is maximum dosage of antihistamine for hives, 10 mg. is not providing relief after 1 mon.

What is maximum dosage of antihistamine for hives, 10 mg. is not providing relief after 1 mon.

Can increase dose: You can increase the dose of a non-sedating antihistamine like cetirizine to 10mg twice a day if need be. Dosing can be increased even more in some situations. You can also consider adding H2 blockers. Talk to your Allergist about additional treatment options to get better control of hives. ...Read more

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I've heard at low doses, Seroquel acts as a strong antihistamine. Is this true & what is the dose?

I've heard at low doses, Seroquel acts as a strong antihistamine. Is this true & what is the dose?

As low as 25mg: There are folk saying this - Discuss it w/ your doctor too. http://www.crazyboards.org/forums/index.php/topic/40642-seroquels-antihistamine-action/ Best! ...Read more

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Can 6.25mg of seroquel (quarter of lowest dose ) still an effective antihistamine ? Because I feel sleepy with it

Can 6.25mg of seroquel (quarter of lowest dose ) still an effective antihistamine ? Because I feel sleepy with it

No: Seroquel isn't meant to be an antihistaminic, some of the effects are due to the nature of the drug an anti psychotic, better not self medicate with this drug category, see your doctor for consultation ...Read more

Dr. Paul Carter
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Antihistamine (Definition)

Sedating and non-sedating antihistamines prevent and treat allergic reactions, and are ...Read more