Benadryl Side Effects

Benadryl Medication Information

Serious Side Effects

Some Benadryl side effects are potentially serious and should be reported immediately to your healthcare provider. Although generally rare, some of these side effects may actually be fairly common, particularly in young children or the elderly. These include, but are not limited to:

Low blood pressure (hypotension)
Heart palpitations
A rapid heart rate (tachycardia)
An irregular heartbeat
Anemia
Low blood platelets
Confusion
Blurred vision or double vision
Loss of balance, especially if accompanied by ringing of the ears (tinnitus) or hearing loss
Seizures
Difficulty passing urine
Hallucinations or delirium
Worsening of ulcers or gastroesophageal reflux disease
Worsening of glaucoma
Signs of an allergic reaction, such as:

An unexplained rash
Itching
Hives
Swelling of the mouth or throat
Wheezing
Difficulty breathing.

Final Thoughts

You may experience some or none of the Benadryl side effects listed in this article. Unfortunately, there is no way for your healthcare provider to know beforehand if you will have side effects from a medicine that you have never tried. Therefore, make sure to let your healthcare provider know if you develop any side effects while taking the drug or if something "just does not seem right." While it may not be a side effect, your healthcare provider will be able to diagnose and treat the problem.

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