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Doctor insights on: Reactine Antihistamine

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Do all zyrtec (cetirizine) have an antihistamine?

Do all zyrtec (cetirizine) have an antihistamine?

Yes, antihistamine: Zyrtec (cetirizine) *is* an antihistamine. Zyrtec (cetirizine) is an antihistamine used for treating allergy symptoms and itching due to hives. There are no other ingredients in zyrtec; however, zyrtec-d, a separate formulation, has in addition to the antihistamine a decongestant. ...Read more

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Dr. Paul Carter
626 doctors shared insights

Antihistamine (Definition)

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


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What the signification of hci ? In most of medicines say. Exemplo: cetirizine hci antihistamine 10 mg tablets

What the signification of hci ? In most of medicines say. Exemplo: cetirizine hci antihistamine 10 mg tablets

The full name meds: This is a very good question. It gets to the heart of science. In nature all molecules are balanced with acid and base to bring the chemical into homeostasis... Meaning to maintain stability. Medications are no different. For them to maintain stability they must mimic human life and chemistry. ...Read more

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Can antihistamine cetirizine cause anger?

Can antihistamine cetirizine cause anger?

Possibly: Sedating antihistamines can sometimes have 'agitating' side effects, especially in children. This would not be common with cetirizine, but is possible. ...Read more

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What is better antihistamine Cetirizine or Fexofenadine?

What is better antihistamine Cetirizine or Fexofenadine?

I like Cetirizine: My personal preference is Zyrtec (cetirizine) however both have similar effects. Allegra (fexofenadine) could be considered the least sedating out of all the OTC antihistamines. ...Read more

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Is it safe to take another 24-hour zyrtec (cetirizine) antihistamine if there's still about 8 hours left before the previous one wears off?

Follow dosing: It's best to adhere to the dosing recommended. It would be hard to overdo it with the zyrtec (cetirizine) , the way you are suggesting, but it begs the question- how well does the rx work , if you want more before the proper dosing interval ? I would think you need to talk with your doctor about other options to achieve safe allergy control. Sometimes more than one rx is necessary. ...Read more

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What if I am concerned my hives are caused by an antihistamine in the first place? I.E. Zyrtec and allegra (fexofenadine)

What if I am concerned my hives are caused by an antihistamine in the first place? I.E. Zyrtec and allegra (fexofenadine)

Very rare : Hives usually come and go randomly. So you may confuse an outbreak with being caused by something else (though not really). So best to see an allergist. ...Read more

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Zyrtec or allegra (fexofenadine) for hives: which is the better antihistamine?

Zyrtec (cetirizine): Which drug is better fora specific patient cannot be predicted. I generally try zyrtec first because it does cannot claim not sedating. A little sedation helps alleve itching. Allegra, (fexofenadine) claritn, and Clarinex are allowed to claim no sedation. ...Read more

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I'm looking for a natural antihistamine for seasonal allergies rather than using zyrtec (cetirizine)?

I'm looking for a natural antihistamine for seasonal allergies rather than using zyrtec (cetirizine)?

Natural treatments : Natural treatments are medications too. Usually not as well studied or characterized for benefit and safety as those approved by the fda. I don't know of any natural antihistamines per se but butterbur has been reported to have benefits. A very safe alternative to allergy medicine is buffered saline washes. These can be purchased or home made but certain hygienic guidelines should be followed. ...Read more

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What antihistamine would be comparable to fexofenadine (allegra)? Is Claritin (loratadine) or zyrtec comparable?

What antihistamine would be comparable to fexofenadine (allegra)?  Is Claritin (loratadine) or zyrtec comparable?

All similar: The various antihistamines such as fexofenidine, Claritin (loratadine) and zyrtec are comparable for allergy symptoms. Some people will find that one medication works better for them than another one. ...Read more

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I had grapefruit, then took 10mg of cetirizine about an hour or so later. I had no idea grapefruit could interact with antihistamines. Am i in danger?

I had grapefruit, then took 10mg of cetirizine about an hour or so later. I had no idea grapefruit could interact with antihistamines. Am i in danger?

No.: There is a protein in grapefruit that can inhibit one of the systems in the body that metabolize drugs. So, this may increase the potency of certain family of drugs, by decreasing the breaking down of the drug in the body. The two antihistamines that were in this category have been removed from the market, so there is probably a small, but clinically insignificant, effect. Don't worry. ...Read more

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Is it ok to take percocet with cetirizine hydrochloride 10 mg antihistamine ?

Yes: The antihistamine Cetirizine is a very safe medication and can be used with most other medications. A very small percentage of people will have drowsiness. This potentially could be worsened by combining with percocet, but not nearly as significant as using benadryl (diphenhydramine). ...Read more

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Do you still need to take antihistamines such as Claritin or zyrtec if you are using nasacort (triamcinolone)?

Allergic Rhinitis: Nasal steroids and oral antihistamines are complimentary, and are often used together in the treatment of allergic rhinitis. ...Read more

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Why are the mg dosage of antihistamines different? Allegra is 180mg , Claritin (loratadine) is 5mg , and zyrtec is 10mg.

Why are the mg dosage of antihistamines different? Allegra is 180mg , Claritin (loratadine) is 5mg , and zyrtec is 10mg.

Potency: Although the doses are not equal they are equivalent in potency. That is the drugs will have equal efficacy at controlling congestion, runny nose etc. The doses are different because they are different compounds and those compounds are of different weight and size. ...Read more

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If you take an antihistamine before you ate such as Zyrtec, would that help prevent a severe allergic reaction such as anaphylaxis?

If you take an antihistamine before you ate such as Zyrtec, would that help prevent a severe allergic reaction such as anaphylaxis?

No: and better not to take any antihistamine prophylactically to prevent possibe severe allergic reaction to any suspected food that would cause allergy, what happens is that the antihistamine masks the initial warning signs that a more severe reaction is coming. You may want to keep an epinephrine injection handy, and avoid suspicious foods. Follow up with an allergist, check aaaai.org 4 an allergist ...Read more

Dr. John Chiu
561 doctors shared insights

Cetirizine (Definition)

Ceftirizine is the generic name of an antihistamine previously marketed under the ...Read more


Dr. John Chiu
541 doctors shared insights

Zyrtec (Definition)

Zyrtec is a non-sedating antihistamine which is a kind of antihistamine type drug (common ...Read more