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Benadryl

Drug Side Effects Explained »

Drug Side Effects: Types

Side effects fall into several categories. Allergic reactions can happen with any drug and can range from itching and rash all the way up to a life-threatening anaphylactic reaction.

Other side effects simply –come with the territory.” Some drugs can't help but trigger side effects because of their chemical structure. One example is the common allergy drug diphenhydramine (also known by the brand name Benadryl). Though it eases allergy symptoms, it also suppresses the activity of the body chemical acetylcholine, and that leads to drowsiness and a host of other side effects, including dry mouth.

Some drugs have barely noticeable side effects when dosed properly. For example, Warfarin (Jantoven, Coumadin) used to prevent blood clots, is usually well tolerated, but serious internal bleeding can occur.

Side effects may only pop up when certain drugs are mixed with certain other things. These might also be...

Read the Drug Side Effects Explained article »

Benadryl

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SIDE EFFECTS

When using this product:

  • marked drowsiness may occur
  • avoid alcoholic drinks
  • alcohol, sedatives, and tranquilizers may increase drowsiness
  • excitability may occur, especially in children
  • be careful when driving a motor vehicle or operating machinery

DRUG INTERACTIONS

Ask a doctor or pharmacist before use if you are taking sedatives or tranquilizers.

Last reviewed on RxList: 11/13/2007
This monograph has been modified to include the generic and brand name in many instances.

Additional Benadryl Information

Benadryl - User Reviews

Benadryl User Reviews

Now you can gain knowledge and insight about a drug treatment with Patient Discussions.

Here is a collection of user reviews for the medication Benadryl sorted by most helpful. Patient Discussions FAQs

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You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.


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