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Doctor insights on: Long Acting Antihistamines

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Benadryl (Definition)

Diphenhydramine is a sedating antihistamine which is a kind of antihistamine type drug (common ...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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Is taking antihistamine everyday bad for you in the long term? Will my immune system get impaired?

Is taking antihistamine everyday bad for you in the long term? Will my immune system get impaired?

No and no.: There are no known longterm sequellae from antihistamines. I would stick with the long-acting, non-sedating ones, such as Allegra and Claritin, (loratadine) since the short-acting ones can make you drowsy. Antihistamines do not affect the immune system in any measurable way. ...Read more

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What amount of does take to get high off of diphenhydramine hci/antihistamine and how long does it take to kick in?

What amount of does take to get high off of diphenhydramine hci/antihistamine and how long does it take to kick in?

Varies: Varies with dose. Some people get sleepy at lower dose than others. Some people get jumpy instead, especially children. Also depends on interaction with other meds or alcohol or caffeine. ...Read more

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I have been congested for 10 days -- much longer than a regular cold. Antihistamines help a little. What else can I try?

Still a cold: A viral upper respiratory infection may last up to 2 weeks, although usually it lasts less. Beyond 2 weeks symptoms may suggest allergy or complicating sinus infection. Antihistamines don't work well for colds. You may try nasal irrigation with saline, even a nasal decongestant such as oxymetazoline (afrin) for no more than five days. If no better then, see a physician. ...Read more

Dr. Paul Carter
601 doctors shared insights

Antihistamine (Definition)

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