Diphenhydramine

A sedating antihistamine that also has antitussive (cough suppressing) and anti-nausea properties.

Dosage by Body Weight

Not recommended for children under 2-6 years in many regions due to sedation. Pediatric dose: 1.25 mg/kg per dose.

Weight-based dosage tracking table for Diphenhydramine, including body weight, dose, frequency, and tracking notes.
Body Weight	Dose	Frequency	Tracking Notes
10-15 kg	12.5 mg	Every 4-6 hours	May cause significant drowsiness or paradoxical excitability.
16-25 kg	12.5 mg to 25 mg	Every 4-6 hours	Max 150 mg per day for children.

CapsuleTabletLiquidTopical Gel

First-generation antihistamine used for allergies, motion sickness, and as a sleep aid.

Diphenhydramine is listed as a generic drug name. Common branded medicines that may contain the same active ingredient include:

No. This medicine is generally not treated as a scheduled/prescription-only drug in common consumer references, but local rules may vary.

CAUTION

Diphenhydramine: Alcohol may increase dizziness, stomach upset, dehydration, or other side effects. Avoid or limit alcohol and follow medical advice.

SAFE IF PRESCRIBED

Diphenhydramine: Use during pregnancy only if prescribed after a healthcare provider weighs the benefits and risks.

SAFE IF PRESCRIBED

Diphenhydramine: Use while breastfeeding only with healthcare provider guidance, especially for repeated or long-term treatment.

CAUTION

Diphenhydramine: This medicine may cause dizziness, drowsiness, weakness, or blurred vision in some people. Avoid driving if affected.

CAUTION

Diphenhydramine: Use with caution in liver disease and consult your healthcare provider if you have abnormal liver tests or jaundice.

CAUTION

Diphenhydramine: Use with caution in kidney disease because dose adjustment or monitoring may be needed for some patients.