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Doctor insights on: Diphenhydramine Contraindicated Glaucoma Asthma Pregnancy

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Is diphenhydramine contraindicated in narrow angle glaucoma, acute asthma, and pregnancy? Why?

Is diphenhydramine contraindicated in narrow angle glaucoma, acute asthma, and pregnancy? Why?

Anti-cholinergic : Diphenhydramine's anticholinergic effects are to blame. They cause it to aggravate increased intraocular pressure, and dry secretions in those having asthma attacks, making it hard to clear secretions. Here's a link: http://answers.Yahoo.Com/question/index?Qid=20090328145710aa3jfbq the link is wrong about pregnancy, though. It's category b, not c, for pregnancy and considered safer than other meds. ...Read more

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Dr. Lois Freisleben-Cook
4 doctors shared insights

Pregnancy (Definition)

When your due date arrives, you will be more than ready to have your baby! Most women deliver the baby somewhere between 37 and 42 weeks. According to the American College of Obstetricians and Gynecologists, only 5% of babies arrive on the exact due date. Approximately 7% of babies are not delivered by 42 weeks, and when that happens, it is referred to ...Read more


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Is it true that diphenhydramine is contraindicated in narrow angle glaucoma, acute asthma and pregnancy?

Is it true that diphenhydramine is contraindicated in narrow angle glaucoma, acute asthma and pregnancy?

DPH & Asthma, glauco: Diphenhydramine(dph), benadryl, (diphenhydramine) is an antihistaminic having an Atropine like effect, i.e. In asthma is dries up secretions in the bronchi ( the respiratory pipes), thus it worsens asthma. In glaucoma it can precipitate an acute angle closure glaucoma, yes it is unwise to use it. On other side effect is lethargy and in pregnancy it is also unwise to unnecessarily sedate the fetus. So, yes yes yes. ...Read more

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Please explain why is diphenhydramine contraindicated in narrow angle glaucoma, acute asthma and pregnancy?

Please explain why is diphenhydramine contraindicated in narrow angle glaucoma, acute asthma and pregnancy?

Side effects: Antihistamines like Diphenhydramine have side effects that effect a certain part of the nervous system (cholinergic) which would cause bronchoconstriction, and further closing of the "angle" in glaucoma (angle closure type). If you must take an antihistamine, speak to your physician about antihistamines that do not or minimally affect this system. Good luck. ...Read more

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Could Benadryl (diphenhydramine) help with asthma like allergy symptoms?

Could Benadryl (diphenhydramine) help with asthma like allergy symptoms?

Benadryl (diphenhydramine) is sedating: Claritin, zyrtec, allegra, or Benadryl (diphenhydramine) can help with allergy and asthma symptoms caused by allergies to respiratory pollens or other airborne allergens. One should work with his doctor to see which combination of over-the-counter allergy meds and prescription asthma inhalers/pills work the best. A patient will learn over time, what medicines to add or increase, depending on how "bad" the air is. ...Read more

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Will giving Benadryl (diphenhydramine) help my 10yo with his asthma at night?  he also has allergies.

Will giving Benadryl (diphenhydramine) help my 10yo with his asthma at night?  he also has allergies.

No: Children who have asthma may have symptoms during the night, the major one being a nighttime dry cough. Benadryl(diphenhydramine) is an antihistamine which helps with allergies and can cause sleepiness. In most cases, Benadryl will not hurt the asthma but will not fix the problem. Asthma symptoms in the night are usually signs of poor asthma control and warrant follow-up with your pediatrician. ...Read more

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I have really bad allergies & also asthmatic, I am wondering if it is safe to take Benadryl (diphenhydramine) as my allergies are unbareable, will it affect my asthma?

I have really bad allergies & also asthmatic, I am wondering if it is safe to take Benadryl (diphenhydramine) as my allergies are unbareable, will it affect my asthma?

Better to use Clarit: Benadryl (diphenhydramine) or diphenylhydramine is a first generation antihistamine wich is quite sedating and has to be taken every 4to6 hours to be effective, while Claritin is long actong once a day, non sedating and can be taken with all other asthma meds. ...Read more

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I have asthma, allergies and pnd. I believe Benadryl (diphenhydramine) will curb my pnd, yet may harm asthma. Should I use it here and there at regular strength? Thank

I  have asthma, allergies and pnd. I believe Benadryl (diphenhydramine) will curb my pnd, yet may harm asthma. Should I use it here and there at regular strength? Thank

Maybe maybe not: Often asthmatics do use antihistamines in cinjunctinwith their routine asthma meds. Discuss using a non-sedating antihistamine like Claritin with your phsyician. Have you tried nasal saline which does not affect your asthma and may reduce your pnd. ...Read more

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Is Benadryl (diphenhydramine) at 200mg good to take with asthma? Thanks.

Is Benadryl (diphenhydramine) at 200mg good to take with asthma?  Thanks.

Dosage?: Are you sure about the dose of 200mg? Regardless, the use of antihistamines in asthma does have a place. Often an asthmatic's "trigger" is an allergy (animal dander, dust mites, etc). Benadryl (diphenhydramine) is an excellent product but be mindful that it can make you sleepy. You may want to try a product like Claritin which mas a minimum of that kind of side effect. ...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

Dr. Sue Ferranti
2,965 doctors shared insights

Asthma (Definition)

Asthma is a disease of the lungs caused by chronic inflammation of the airways most often caused by allergies. This inflammation results in airway swelling and hyperactivity leading to difficulty breathing, shortness of breath, dry cough, etc. MIT is a diagnosis made by combining clinical ...Read more


Dr. Robert Chang
1,018 doctors shared insights

Glaucoma (Definition)

Glaucoma refers to a group of eye conditions that lead to damage to the optic nerve, the nerve that carries visual information from the eye to the brain. In many cases, damage to the optic nerve is due to increased pressure in the eye, also known ...Read more