Children's diphenhydramine
Children's medicinesAlso known as Children's Benadryl
Diphenhydramine is a fast-acting antihistamine for allergic reactions — hives, itching, and the sneezy-watery misery of allergies. It's stronger sedation-wise than newer options like cetirizine, which is exactly why it needs respect. Never use it to make your child sleepy: in some kids it backfires into hyperactivity instead, and sedating a child with it is dangerous. Follow the age limits on the label — don't give it below the labeled age without a doctor's okay — and dose by weight with the syringe or cup from the box, never a kitchen spoon.
How to take it
When
As needed for allergic reactions or itching, at the timing on the label. It kicks in fairly quickly but wears off in hours — it's not a once-a-day medicine.
Food
With or without food — either works.
Avoid
Never use it as a sleep aid or to calm a child for travel. And don't stack it — diphenhydramine hides in many cold, allergy, and "nighttime" combo products.
Age limits
Follow the label's age cutoff — ask the doctor before using it in younger children. Keep it locked and up high: overdose in kids is genuinely dangerous, and the liquid tastes good on purpose.
Missed a dose?
It's given only as needed, so there's no missed dose to worry about. Never give a double dose, and never give a second dose early because the first didn't seem to work.
Common side effects
- Sleepiness and grogginess
- The opposite in some kids — hyper, wired, cranky
- Dry mouth
- Dizziness
- Constipation
Call a doctor if
- Racing heart, flushed hot skin, big pupils, or seeing things that aren't there — signs of overdose; call Poison Control (1-800-222-1222) or 911 now
- A child who is extremely drowsy, hard to wake, or breathing oddly — get emergency help
- Seizure — call 911
- Swelling of the lips or tongue with trouble breathing during an allergic reaction — that's beyond this medicine; call 911
- Your child got into the bottle — call Poison Control even if they seem fine