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Q: What ingredient in Benadryl makes you sleepy?
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What is the active ingredient in Waldryl?

Diphenhydramine - an antihistamine, the same ingredient that is in Benadryl


Can triaminic be taken with Benadryl?

If the Triaminic has an "antihistamine" in it, then you don't need to take Benadryl. Benadryl is an antihistamine that usually stops the itchy nose/ears, and sneezing. If you look at the ingredient in Benadryl (plain Benadryl, it's pink) you will notice it's in a lot of cold medicines. It's also in some sleep medicines. It usually makes you drowsy, that is why.


Is zertec the same as Benadryl?

Im not sure.. But I took like 175mg of benadryl and I got sleepy as s@%t.. not high but felt a little out of it :p


Can you take advair and Benadryl at the same time?

Gas and Nausea from the Advil. Dipenhydramine will make you sleepy.


Why do eggs make you sleepy?

They contain tyrosine and tryptophan- one makes you alert and the other makes you sleepy


Does Tylenol nighttime have alcohol?

No, the active ingredient in Tylenol Night Time is the same as in Benadryl. (Diphenhydramine.)


How does Benadryl work?

Diphenhydramine, the main ingredient in Benadryl, works by blocking histamine at receptor sites. It also decreases central nervous system function, causing drowsiness.


Is there a disease that makes you very sleepy?

There is a condition called Narcalepsy, that makes you very sleepy. I do not know if there are any diseases that do tho.


Tryptophan what does it do to your body?

It makes you sleepy


Who is an imaginary person who makes you sleepy?

The sandman.


If you take Benadryl in the morning and drinking alcohol at night will everything be okay?

Benadryl only lasts for 4-6 hours. There may still be some Diphenhydramine in your system up to 24 hours after taking the drug.Take one shot see how sleepy you get.


What effects does caffeine have on the body?

It makes it less sleepy.