Dosages for Diphenhydramine HCL (Benadryl®) Table 2: Administered Orally The recommended dose of diphenhydramine HCL is 1 2 mg/kg body weight. – Benadryl Dose, given orally: of Weight Range of Weight Age Group: (Pounds)* (Kilograms)* 12.5 mg/5 mL liquid 12.5 mg/5 mL liquid, Dose, orally, mL 1 - 6 months DO NOT GIVE TO THIS AGE GROUP 7 - 36 months 20 - 32 lbs 9 - 14.5 kg 10 mg 20 mg 4 mL 8 mL – – Infants and 37 - 59 months 33 - 39 lbs 15 - 17.5 kg 15 mg 30 mg 6 mL 12 mL – – Children 5 - 7 40 - 56 lbs 18 - 25.5 kg 20 mg 30 mg 8 mL 12 mL – – 8 - 12 years 57 - 99 lbs 26 - 45 kg 30 mg† 12 mL† Teens 13 - 18 years 100+ lbs 46+ kg 50 mg‡ 20 mL‡ Adults 19 years & older 100+ lbs 46+ kg 50 mg‡ 20 mL‡ Note: If body weight is known, then dosing by weight is preferred. If weight is not known or readily available, dosing by age is appropriate. *Rounded weight for infants, children, and teens at the 50th percentile for each age range Maximum dose for children † Maximum dose for teens and adults ‡ Dosages for Diphenhydramine HCL (Benadryl®) Table 3: Administered Intramuscularly The recommended dose of diphenhydramine HCL is 1 2 mg/kg body weight. – Age Group: Benadryl Dose, given by injection:
Table 2: Dosages for Diphenhydramine HCL (Benadryl®) Administered Orally The recommended dose of diphenhydramine HCL is 1 – 2 mg/kg body weight. Age Group: of Weight (Pounds)* Range of Weight (Kilograms)* Benadryl Dose, given orally: 12.5 mg/5 mL liquid, 12.5 mg/5 mL liquid Dose, orally, mL Infants and Children 1 - 6 months DO NOT GIVE TO THIS AGE GROUP 7 - 36 months 20 - 32 lbs 9 - 14.5 kg 10 mg – 20 mg 4 mL – 8 mL 37 - 59 months 33 - 39 lbs 15 - 17.5 kg 15 mg – 30 mg 6 mL – 12 mL 5 - 7 40 - 56 lbs 18 - 25.5 kg 20 mg – 30 mg 8 mL – 12 mL 8 - 12 years 57 - 99 lbs 26 - 45 kg 30 mg† 12 mL† Teens 13 - 18 years 100+ lbs 46+ kg 50 mg‡ 20 mL‡ Adults 19 years & older 100+ lbs 46+ kg 50 mg‡ 20 mL‡ Note: If body weight is known, then dosing by weight is preferred. If weight is not known or readily available, dosing by age is appropriate. *Rounded weight for infants, children, and teens at the 50th percentile for each age range † Maximum dose for children ‡ Maximum dose for teens and adults Table 3: Dosages for Diphenhydramine HCL (Benadryl®) Administered Intramuscularly The recommended dose of diphenhydramine HCL is 1 – 2 mg/kg body weight. Age Group: Benadryl Dose, given by injection:
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