Diphenhydramine (Benadryl) Pediatric Dose Calculator

Choose a medication or enter a prescribed dose. Confirm the patient and formulation before calculating.

Patient information

Shared across calculations.

Medications

Confirm the strength on the actual product.

Dose in the existing record: 1.25 mg/kg/dose

Standard dosing for allergies

Medication notes and source

First-generation antihistamine with sedating effects. May cause drowsiness, dry mouth, and urinary retention. Use caution in elderly. Not recommended for children under 2 years. Maximum 50mg/dose. Avoid alcohol and other CNS depressants.

Open source reference
About this medication and its sources

About Diphenhydramine (Benadryl) Pediatric Dose Calculator

This page opens the calculator with Diphenhydramine (Benadryl) selected. Enter the patient's weight and confirm the concentration, frequency, indication, and dose limits before using any result.

Required Inputs

  • Current weight and correct unit.
  • Available concentration.
  • Prescribed frequency.
  • Duration when applicable.

References and Limits

First-generation antihistamine with sedating effects. May cause drowsiness, dry mouth, and urinary retention. Use caution in elderly. Not recommended for children under 2 years. Maximum 50mg/dose. Avoid alcohol and other CNS depressants.

Confirm the indication, allergies, concentration, units, renal function, maximum dose, and local protocol with a healthcare professional.

Interpret results as a structured aid for reviewing clinical data, not as an automatic answer. If the output does not match the exam, repeat the measurement, review units, and confirm that the age or date used is correct.

For follow-up, compare results with prior measurements and document the reference source used. Important changes, extreme values, or therapeutic decisions should be evaluated with current guidelines and professional judgment.

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