Active Ingredient(s): Diphenhydramine
FDA Approved: * March 4, 1946
Pharm Company: * PARKE DAVIS
Category: Allergies, Cough & Cold

* This drug may consist of multiple approval dates, manufacturers, or distributors. If applicable, they would be listed below under "NDC Database Records".

Benadryl Overview

Diphenhydramine is an antihistamine mainly used to treat allergies.[5] It is also used for insomnia, symptoms of the common cold, tremor in parkinsonism, and nausea.[5] It is used by mouth, injection into a vein, and injection into a muscle.[5] Maximal effect is typically around two hours after a dose and effects can last for up to seven hours.[5] Common side effects include sleepiness, poor coordination, and an upset stomach.[5] Its use is not recommended in babies.[5] There is no clear risk...

Read more Benadryl Details
Details May Include Instructions, Side Effects, Interactions, Etc. Drug monograph is from Wikipedia. All text is available under the terms of the GFDL (GNU Free Documentation License). Source:

Recent Benadryl Forums: RSS Feed

round dark pink pill with b on one side
1 Reply RSS
I found a round dark pink pill with b on one side and blank on the other. Seems to be coated. ## I have seen a number of round pink pills with a lowercase "b" on one side, but the other side to these pills also bear 3 digit numerals. On the other hand if it's a capital "B" on one side and blank on the back, then this is reportedly identified as a Children's Benadryl (fast melt); containing 19mgs of diphenhydramine citrate. This medication is an antihistamine used for treating symptoms of an allergic reaction. For further verification, the pill itself is a product of Pfizer. I hope this helps!
Updated 1 minute ago.
Assured Allergy Relief - pink pill s4 and drowsiness
1 Reply RSS
Do Assured Allergy Relief pills (Diphenhydramine Hydrochloride 25mg) imprinted with s4, cause you to get drowsy? Because every time I take one my pain is gone. ## Yes, drowsiness can be a normal side effects, according to FDA reports, you may also experience dizziness, and dry mouth. How often do you take it? What are you allergic to?
Updated 5 days ago.
Taking Benadryl for an allergic reaction to Bactrim
1 Reply RSS
If I take an extra bactrim and have an allergic reaction to it, can I take a benadryl with it? ## Yes, as long as your doctor approves and you aren't also allergic to the Bactrim. As a matter of fact, when I had an allergic reaction to it, that it what my doctor prescribed. The FDA lists its typical side effects as possibly including dizziness, drowsiness, and dry mouth. Is there anything else I can help with?
Updated 5 days ago.
Benadryl - bright pink oblong pill s4
1 Reply RSS
My boyfriend was prescribed benadryl and I was given these pills. They told me they were generic benadryl. They are bright pink oblong pills imprinted with s4. ## That is correct, these tablets are manufactured by Himprit Pharmaceuticals and they list it as containing 25mgs of Diphenhydramine, which is a generic for Benadryl. The FDA lists the typical side effects as possibly including dizziness, drowsiness, and dry mouth. Is there anything else I can help with?
Updated 6 days ago.
Bad reaction after switching from Subutex to Suboxone
10 Replies RSS
I was on Subutex for over a year and a half then I lost my doctor. When I found out I was pregnant he put me back on subutex. After I had my daughter he took me off subutex and put me on suboxone. Within a couple hours of the first dose my skin became red and blotchy. I couldn't stop scratching at myself so he prescribed Benadryl for an allergic reaction... I continued to take them for a month and a half.. I started getting horrible migraines and nausea, and now within an hour hour and a half of taking the pill I'll throw up.... Every time. I have spoken with my doctor about these symptoms..He tells me its not physically possible to be allergic to Suboxone and that if I'm allergic to it then I must be allergic to Subutex as well. But I never had these issues with the Subutex...
Updated 8 days ago.
benadryl and bromfed interactions
2 Replies RSS
Can I take benadryl and bromfed within a couple hours of each other? I have a terrible cough. Took benadryl first and it hasn't helped. ## Benadryl is an antihistamine that is used to treat or prevent allergic reactions, so it will not do anything to treat a cough, and unfortunately, Bromfed also isn't like to help, since it has not cough suppressant properties, according to the NIH. To treat a cough, you need a cough suppressant. Have you consulted your doctor to see what's causing your cough and what would be the best remedy? Are you on any other medications? ## I took benadryl two hrs ago but now have a very bad headache. Can I take a BC powder?
Updated 18 days ago.
does benadryl help dry fluid from behind eardrum
2 Replies RSS
Hello, I was diagnosed with Pneumonia 4 weeks ago, tried Zpack it didn't work then I tried Ampicillin it cleared up the Pneumonia but left me with fluid behind the ear drum the pharmacist suggested Benadryl, I do have another bottle of amoxicillin. I'm not in pain, no infection per ENT my hearing is just badly impaired. Thank You, for you thoughts. ## Hello, Brittany! How are you? It is a decongestant, so it can have a drying effect and might help. Side effects to it may include dizziness, drowsiness and dry mouth. However, you should only take it, if your doctor says that it is safe for you to do. More antibiotics won't help, since they only treat bacterial infections and will do nothing to dry up the remaining fluid. Plus, taking them inappropriately could result in your d...
Updated 23 days ago.
Pill taste like poison/ acid
1 Reply RSS
White, round pill. 54 879 imprint on one side and a line on other side. I have had prescription pain meds for years, I know what bitter is, but this one had a taste so bad I spit it out immediately and it burned slightly. The taste stayed for about fifteen minutes. It also made my other pills smell really bad like a poison bad smell. . It was like nothing I ever smelled or tasted before. I had it in my mouth about 2 seconds, no water and out it came and the imprint was gone it seemed very fragile and abnormally thick. So is it Fake? Poison? Or is that how they taste I have never had one before. ## Hello, Ivy! How are you? I am very sorry about the symptoms you experienced. No pill should be held in your mouth for any length of time, they are intended to be swallowed immediately with a f...
Updated 1 month ago.
h 106 white pill what are they for
4 Replies RSS
This is similar to benadryl or vistaril. It's an older drug and been around a long time like benadryl. It will make u sleepy. It won't cure scabies but it'll help u not to scratch the bumps. Scabies are micro bugs that are kinda like mini ticks that burrow under the skin a suck blood. Be sure u treat all your clothes, furniture, car seats, and bedding. If u don't they'll just infest your home and u. The med will help with the itch only! Good luck getting rid of your little blood suckers...... No these are not benzodiazepines, they're antihistamines!!!! ## Hello, Katz and thank you for your helpful post! To add some additional information, the tablet in question is manufactured by Heritage Pharmaceuticals and they list it as containing 25mgs of Hydroxyzine. The FD...
Updated 1 month ago.
2 Replies RSS
The pill is long light green pill with these number on one side 44320 ## Found a match it's Wal-dryl Allergy and Sinus Headache. Click here to see a picture of the pill. Do you have any more questions or information to add? Please post back if you do. ## Same thing happen to my son when he was little nurse said sugar and liquid benadryl it really worked
Updated 1 month ago.

Possible Dosages for this and Related Drugs:

  • Capsule: 25mg, 50mg
  • Cream: 1% + 0.1%, 2%, 2% + 0.1%
  • Elixir: 12.5mg/5ml
  • Gel: 2%
  • Injection: 10mg/ml, 50mg/ml
  • Liquid: 12.5mg, 12.5mg/5ml, 2% + 0.1%, 6.25mg/5ml
  • Ointment: 2%
  • Oral Dissolving Strip: 12.5mg, 25mg
  • Spray: 1%, 2% + 0.1%
  • Suspension: 25mg/5ml
  • Tablet: 25mg, 50mg
  • Tablet, Chewable: 12.5mg, 25mg
  • Tablet, Orally Disintegrated: 19mg
Note: Above list includes dosages for all drugs with the same combination of active ingredients.

NDC Database Records for Benadryl: (5 results)

Sorted by National Drug Code
  • 21695-811 Benadryl 25 mg Oral Tablet by Rebel Distributors Corp
  • 29485-1007 Benadryl 25 mg Oral Tablet, Film Coated by Mechanical Servants, LLC
  • 50580-226 Benadryl 25 mg Oral Tablet by Mcneil Consumer Healthcare Div Mcneil-ppc, Inc
  • 61786-866 Benadryl 25 mg Oral Tablet, Film Coated by Remedyrepack Inc.
  • 66715-9706 Benadryl 25 mg Oral Tablet by Lil' Drug Store Products, Inc.

Other drugs which contain Diphenhydramine or a similar ingredient: (38 results)

Possibly related Benadryl Topics:

benadryl question experience allergies So I've taken benadryl off and on, especially when I didn't have a prescription for loratadine back in the old d... 3 replies
benadryl and bromfed interactions Can I take benadryl and bromfed within a couple hours of each other? I have a terrible cough. Took benadryl first and it... 2 replies
benadryl with xarelto I have pinpoint red spots like a reaction of some sort. I'm on xarelto for clots found in my lungs n leg from cast n... 2 replies
benadryl pink capsule 21 Should one or two i cannot fall asleep and my legs hurt i jave the pink 50 mg capsules ## Hello, Weezy! How are you? The... 2 replies
benadryl ptsd anxiety I have been diagnosed with ptsd by two different doctors after the suicide of my husband. these doctors will only give m... 2 replies
Benadryl Hydrochloride IV I have had 2 anaphylactic shock episodes due to ER visits with Benadryl in my IV. Allergist tested...allergic to Benadry... 2 replies
Benadryl - bright pink oblong pill s4 My boyfriend was prescribed benadryl and I was given these pills. They told me they were generic benadryl. They are brig... 1 reply
benadryl + alka seltzer mixture Can you take Alka seltzer and benadryl at same time? ## Hello, Tricia! How are you? Which Alka-Seltzer formulation do yo... 1 reply
benadryl uses Will Benadryl allergy liqui-gels help cure a spider bite ? ## Hello, Teresa! How are you? There's no 'cure',... 1 reply
benadryl and alka seltzer Can benadryl and alks-seltzer be taken together? One for allergy and the other for an upset stomache? ## Hello, Ellen! H... 1 reply