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Doctor insights on: Antihistamines Non Drowsy

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Can a non drowsy antihistamine that had no side effects that I've noticed hurt you if u take 2 pills in 24hrs instead of 2?

Can a non drowsy antihistamine that had no side effects that I've noticed hurt you if u take 2 pills in 24hrs instead of 2?

No: Which antihistamine? Why using it? Sometimes, for chronic urticaria, cetirizine [Zyrtec] is dosed at 3 a day . The official dose of these is 1 a day. Allegra and claritin are also sometimes used at double or triple dose.It is best if you consult a Dr before you take doses higher than usual. ...Read more

Benadryl (Definition)

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


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Can Claritin (loratadine) non-drowsy antihistamine still cause drowsiness?

Can Claritin (loratadine) non-drowsy antihistamine still cause drowsiness?

Yes: Claritin is a second generation antihistamine which causes much less drowsiness than first generation antihistamine, like benadryl (diphenhydramine). The number of people who feel drowsy on Claritin is so low that it is labeled "non-drowsy". But each of us is unique. I have plenty of patients who feel drowsy on claritin, especially petite women. ...Read more

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Bitten by unknown insect. Redness and swelling to forarm. Marked with pen and doubled in size over 36hrs. Taking non drowsy antihistamines and icing?

Bitten by unknown insect. Redness and swelling to forarm. Marked with pen and doubled in size over 36hrs. Taking non drowsy antihistamines and icing?

Ice: Benadryl (or your choice of a non-sedating antihistamine such as Zyrtec, Claritin, or Allegra), ice, and ibuprofen is a good initial treatment for insect bites. Infection is a possible delayed complication. If you develop a boil, a discolored blister, fever, increasing pain, or other concerning signs, see a physician for an exam. ...Read more

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Zyrtec (cetirizine) makes me very drowsy. Is this common and are there non-drowsy antihistamines that provide as effective allergy relief? Thanks

Zyrtec (cetirizine) makes me very drowsy. Is this common and are there non-drowsy antihistamines that provide as effective allergy relief? Thanks

Yes: This is a common side effect of Zyrtec, but it is different for everyone. If Zyrtec makes you drowsy, you could try the other 2 common anti-histamines instead - Allegra or Claritin (loratadine). Some people have been drowsy with these medicines as well, but others have not. Best wishes. ...Read more

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Where can I buy Non drowsy Benadryl (diphenhydramine)?

Where can I buy Non drowsy Benadryl (diphenhydramine)?

Oxymoron: Benadryl (diphenhydramine) is Benadryl (diphenhydramine) which is often associated with drowsiness although not everyone is affected to the same extent. ...Read more

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Please let me know if there is anything that contains the same ingredients that Benadryl (diphenhydramine) has but its non drowsy?

Antihistamine: Benadryl (diphenhydramine) is the first generation antihistamine that has anticholinergic property and crosses the blood-brain barrier causing drowsiness. Several other second generation antihistamine works well and does not cause drowsiness like zyrtec, allergra and claritin. ...Read more

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Why most doctors advice two types of anti histamines for urticaria.One that is with drowsy and the other non drowsy.Tnx?

Hives: Because we can't have you sleepy during the day when you have things to do. The non-sedating are best in the day and sedating are best at night. ...Read more

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Will non-drowsy tussin dm make you hyper?

Will non-drowsy tussin dm make you hyper?

In some people: Dm is dextromethorphan, which can act like a neurotransmitter of a stimulatory nature. ...Read more

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Loratidine non drowsy does it keep you awake?

Loratidine non drowsy does it keep you awake?

No: Loratadine is an antihistamine and should not keep one awake. If the antihistamine is paired with a decongestant then there is the potential that this combination could keep one awake. ...Read more

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What's the best non-drowsy allergy medication?

What's the best non-drowsy allergy medication?

Allegra (fexofenadine): If you are referring to over-the-counter antihistamines than Allegra (fexofenadine) is considered one of the most non-sedating on the market. Airline pilots can take this medication while flying so it has been proven to be non-sedating. Other non-sedating antihistamines include Zyrtec and Claritin (loratadine). ...Read more

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Why does drowsiness occur after taking antihistamines?

Complex: Histamine is a wake promoting neurotransmitter in the brain. Older antihistamines like Benadryl (diphenhydramine) cross into the brain and block this center allowing for drowsiness to occur. The newer antihistamines like alleges, claritin, zyrtec do not cross as easily and are less likely to promote drowsiness. ...Read more

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What's the most effective non-drowsy allergy medication?

What's the most effective non-drowsy allergy medication?

Allergy Med: This is not a fair question, and I am sorry, but i must disagree with dr. Kwok. The sole oral antihistamine that does not cross the blood brain barrier and does not cause drowsiness in fexofenadine (aka.. Allegra). Every other otc oral antihistamine has the risk of drowsiness. Most effective is also not fair bc every patient is different and we tailor therapy to the patient. C ur allergist. ...Read more

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How come non-drowsy Claritin (loratadine) still makes you tired?

How come non-drowsy Claritin (loratadine) still makes you tired?

Claritin (loratadine): Hello, I have treated many people with allergy with antihistamines. Even though they are listed as non sedating, some people react to these medications in an unexpected fashion. Sedation may still occur and if this is present, i usually recommend using this medication if needed at night before sleep. It will still work for 24 hours and may help with allergy and sleep. ...Read more

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In your expert opinion, what's the best non-drowsy allergy medicine?

In your expert opinion, what's the best non-drowsy allergy medicine?

Steroid spray: Nasal steroid does not cause drowsiness but you will need a prescription. For otc antihistamine, Allegra is likely the least likely to cause drowsiness. ...Read more

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Can drowsiness caused by antihistamines be treated or minimized at a necesary event?

Can drowsiness caused by antihistamines be treated or minimized at a necesary event?

Yes but: A decongestant is often added to antihistamine and would counteract some of the drowsy effects but that is not a good solution. There are at least two other non-drowsy antihistamines available and steroid nasal spray actually works far better without the drowsy effect. If your only choice is a sedating antihistamine, take it an hour before you go to bed instead of the morning. ...Read more

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I had Allegra (fexofenadine) d non drowsy 24 hours ago and was wondering if i can drink?

I had Allegra (fexofenadine) d non drowsy 24 hours ago and was wondering if i can drink?

Not a problem: The allergra is out of your system by 24 hours and so the question is moot for you.. However there is no interaction between allegra (fexofenadine) and alcohol. ...Read more

Dr. Paul Carter
630 doctors shared insights

Antihistamine (Definition)

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


Dr. Marsha Davis
425 doctors shared insights

Drowsiness (Definition)

Drowsiness = feeling sleepy/ feeling ...Read more