What Are the Possible Side Effects of Benadryl?
Benadryl (diphenhydramine) is an antihistamine commonly used to treat allergy symptoms, itching, and hives. While generally considered safe, Benadryl can cause a range of side effects, some of which can be severe [1].
Common Side Effects
According to the manufacturer, common side effects include drowsiness, dizziness, dry mouth, and stomach upset [2]. These side effects are usually mild and temporary, resolving on their own within a few days.
Less Common but More Severe Side Effects
However, some individuals may experience more severe side effects, including:
* Allergic reactions, such as difficulty breathing, swelling, and rapid heartbeat [1]
* Confusion, disorientation, or memory loss, especially in older adults
* Seizures, especially in people with a history of seizure disorders
* Urinary retention, especially in men
* Increased heart rate and blood pressure
Rare but Potentially Life-Threatening Side Effects
In rare cases, Benadryl can cause more serious side effects, including:
* Stevens-Johnson syndrome and toxic epidermal necrolysis, severe skin conditions that require immediate medical attention [3]
* Anaphylaxis, a severe allergic reaction that can be life-threatening if not treated promptly
Can These Side Effects Be Prevented or Minimized?
To minimize the risk of side effects, follow the recommended dosage and do not take Benadryl longer than necessary. Be cautious when using Benadryl with other medications, as it can interact with them and increase the risk of side effects [1].
Who Should Not Take Benadryl?
Certain individuals should avoid taking Benadryl or use it with caution, including:
* Children under 6 years old, as it can cause severe and potentially life-threatening side effects
* Older adults, as it can exacerbate dementia and other age-related conditions
* Individuals with a history of heart conditions, such as arrhythmias or heart failure
* Those with a history of kidney or liver disease
What to Do if You Experience Severe Side Effects
If you or someone else experiences severe side effects, such as difficulty breathing, rapid heartbeat, or confusion, call emergency services or seek immediate medical attention [2].
Sources:
[1] https://www.drugs.com/s side effects/diphenhydramine.html
[2] https://www.benadryl.com/side effects
[3] https://www.mayoclinic.org/drugs-supplements/diphenhydramine-oral-route/side effects/drg-20065244