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Understanding Antihistamines
OTC antihistamines can treat allergy symptoms.
Because they are available OTC, you do not need a prescription.
But when you have allergies, the immune response overreacts and releaseschemicalssuch as histamines, which cause allergy symptoms.
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Benadryl contains the active ingredientdiphenhydramine.
It is a first-generation antihistamine.
First-generation antihistamines were the first group of antihistamines developed.
Claritin contains the active ingredient loratadine.
It is a second-generation antihistamine.
Second-generation antihistamines are newer antihistamines that tend to cause less drowsiness.
They are sometimes referred to as non-sedating antihistamines.
Claritin works by blocking histamine, a substance that causes allergy symptoms.
The ingredient loratadine is also available as a generic alternative to the brand-name Claritin.
What Is Benadryl?
Benadryl, which contains diphenhydramine, is a first-generation antihistamine.
Benadryl works by blocking histamine, a substance that causes allergy symptoms.
The ingredient diphenhydramine is also available as a generic alternative to the brand-name Benadryl.
The injectable formulations are available by prescription.
Always read labels carefully to check the proper dosage before taking Claritin or Benadryl.
Check with a healthcare provider or pharmacist if you have any questions about dosing.
When using a liquid formulation, always measure with a medication-measuring machine.
Because multiple medication formulations are available, we will provide a few common examples.
A dose of Claritin starts to work within one to three hours.
It reaches its maximum effect at around eight to 12 hours and lasts 24 hours.
This is why it only needs to be taken once daily.
Benadryl works faster but only lasts for a short time.
A dose of Benadryl starts working within 1530 minutes.
It reaches its maximum effect in two to four hours.
That said, let’s take a look at some guidelines.
Though similar, they do have notable differences.
Benadryl is also more likely to interact with certain medications or medical conditions.
Do not store it in the bathroom.
Keep out of reach and out of sight of children and pets.
Ask your pharmacist for help if you are unsure how to use a measuring unit.
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