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Doctor insights on: Fast Acting Antihistamine

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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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Are there any immediate acting allergy medications I can take other than Benadryl (diphenhydramine)?

Are there any immediate acting allergy medications I can take other than Benadryl (diphenhydramine)?

Several: OTC second generation antihistamines as cetirizine and loratadine, but read the labels and instructions carefully ...Read more

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Am taking 24hr alegra but my allergies still act up at night, so I take a Benadryl (diphenhydramine) at night too?

Am taking 24hr alegra but my allergies still act up at night, so I take a Benadryl (diphenhydramine) at night too?

Allergic rhinits: Instead of benadryl, (diphenhydramine) i recommend you to ask your doctor for a prescription of a nasal steroid to use once a day. Examples are flonase, nasaonex, Qnasl and nasacort. Another class of medicines your doctor can try is singulair, 10 mg, taken once a day. ...Read more

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I wanted to know I took benadryl (diphenhydramine) because my allergies are acting up and I'm stuffed up, i have a cough, I'm weeding because my asthma as well. Is it o?

I wanted to know I took benadryl (diphenhydramine) because my allergies are acting up and I'm stuffed up, i have a cough, I'm weeding because my asthma as well. Is it o?

Probably not: I presume you are asking whether it is ok to do some weeding when your nose is stuffed up and your asthma is not controlled. In general , the answer would be no since you are likely allergic to weed pollen and molds from the disturbed soil. It is also important for you to call your doctor about your asthma. Benadryl (diphenhydramine) or any other antihistamine has no decongesting action, nasal steroid does. ...Read more

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My doctor prescribed me trazodone 100 mg for sleep and I am now experiencing pins and needles all over. I took 4 Benadryl (diphenhydramine) to counter act.

My doctor prescribed me trazodone 100 mg for sleep and I am now experiencing pins and needles all over. I took 4 Benadryl (diphenhydramine) to counter act.

Oversedating: It is not a good idea to combine sedating medications. The trazadone was given to help you sleep and taking additional 4 Benadryl (diphenhydramine) which I assume is 100mg will add too much extra sedation on top. If the side effects of trazadone are bothersome I recommend discussing other options with your doctor instead of taking a lot of other medications to mask symptoms. ...Read more

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A small neck rash a few days prior to getting a full body rash very quickly. Appears in a.M. Before foods or meds. Clears fast with no antihistamine?

A small neck rash a few days prior to getting a full body rash very quickly.  Appears in a.M. Before foods or meds. Clears fast with no antihistamine?

Urticaria: Urticaria refers to a group of disorders affecting adults and children, in which red patches and weals occur in the skin. A wheel is a swelling of the surface skin. The skin swelling seen in urticaria is due to the release of chemicals such as histamine from mast cells in the skin which causes small blood vessels to leak. Treatment is with antihistamine or avoidance of the causative agent. ...Read more