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A 26-year-old female asked:

took 2 reactine e.s 24 hours ago. safe to take 2 benadryl (diphenhydramine) now?

1 doctor answer3 doctors weighed in
Dr. John Chiu
Allergy and Immunology 57 years experience
Yes: As long as you are aware that this may make you drowsy- perhaps that's what you want in the first place.

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Similar questions

A 26-year-old member asked:

What are allegra and xyzal (levocetirizine) used for?

2 doctor answers5 doctors weighed in
Dr. Stephen Kimura
Allergy and Immunology 35 years experience
Allergies: Allegra and xyzal are two different types of antihistamines. They are called non sedating antihistamines as older antihistamines like Benadryl (diphenhydramine) cause drowsiness in some people. The entire class of medicines are used to treat allergies or allergic reactions.
A 34-year-old member asked:

Why does drowsiness occur after taking antihistamines?

2 doctor answers3 doctors weighed in
Dr. Patrick Melder
ENT and Head and Neck Surgery 27 years experience
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.
CA
A 33-year-old member asked:

I keep getting hives! is it okay to take Benadryl (diphenhydramine) every day?

2 doctor answers4 doctors weighed in
Dr. Ankush Bansal
Internal Medicine 17 years experience
No: Benadryl (diphenhydramine) has many unintended side effects. You should not take it every day. If you are getting hives frequently, you are allergic to something - perhaps a soap or detergent, for example. You should see your doctor for a thorough history, blood work, and possible allergy testing.
NV
A 37-year-old member asked:

Is it safe to take two zyrtec (cetirizine) a day, one in the morning and one at night?

2 doctor answers2 doctors weighed in
Dr. Thomas Byrnes
Family Medicine 29 years experience
Sedation: That dose of zyrtec is going to be very sedating. This defeats the purpose of taking zyrtec instead of benadryl (diphenhydramine). That level of sedation will make you a drowsy --> dangerous driver. Have you tried Loratadine or allegra? Do you use Flonase or something like it? Do you regularly flush your nose with a saline/ baking soda solution?
A 32-year-old member asked:

What is the difference between the effects of pcp and Benadryl (diphenhydramine) overdoses?

1 doctor answer2 doctors weighed in
Dr. Stevan Cordas
Internal Medicine 57 years experience
PCP: Big difference. Too much Benadryl (diphenhydramine) can make you tired and sleepy and even a lettle confused but angel dust is a lot worse. To see effects go to http://www.Cmcsb.Com/pcpangel.Htm.

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Last updated Apr 10, 2018
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