Intramuscular Ranitidine Dosing

Introduction to Ranitidine Dosing

The recommended intramuscular (IM) dose of ranitidine is 1 mg/kg, which can be administered as needed for conditions such as anaphylaxis, according to the Journal of Allergy and Clinical Immunology guidelines 1

Standard IM ranitidine dose for adults is 50 mg per dose, with dosing adjusted based on clinical response, as recommended by the Journal of Allergy and Clinical Immunology 2
For children, the recommended IM dose is 1 mg/kg per dose, with a dosing range of 12.5 to 50 mg (1 mg/kg) being appropriate for pediatric patients, according to the Journal of Allergy and Clinical Immunology 1, 2
The maximum single dose should not exceed 50 mg, even in larger children, as per the Journal of Allergy and Clinical Immunology guidelines 1, 2

When used in anaphylaxis management, ranitidine can be diluted in 5% dextrose to a total volume of 20 mL and administered over 5 minutes (for IV route), as recommended by the Journal of Allergy and Clinical Immunology 1, 2
In anaphylaxis management, H2 antagonists like ranitidine are considered second-line therapy to epinephrine and should never be administered alone, according to the Journal of Allergy and Clinical Immunology 1, 2
A combination of diphenhydramine and ranitidine is superior to diphenhydramine alone for managing anaphylaxis, as per the Journal of Allergy and Clinical Immunology guidelines 1, 2