Ontario Paramedic Practice Exam

The correct answer regarding the dosing requirement for diphenhydramine administered via intramuscular (IM) injection is linked to the weight-based dosing guidelines often used in pediatric and adolescent patients. When considering the medication administration based on weight, the guideline specifies different dosages for patients based on their body mass.

For individuals weighing equal to or over 25 kilograms but under 50 kilograms, a specific dosing regimen is often recommended to ensure safety and efficacy. This approach allows for the adjustment of the medication dose to accommodate the patient's size, which can directly influence how the body metabolizes and responds to the medication.

This weight-based approach is crucial in preventing underdosing in lighter individuals and avoiding potential overdosing in heavier individuals. By selecting the weight range indicated in the correct choice, paramedics can administer a safe and effective dose based on established clinical guidelines.

In contrast, the other options do not adequately address the importance of weight-based dosing or apply it inappropriately to ensure safe administration across varying patient sizes. Therefore, the choice reflecting the correct weight range promoting safe dosing practices is ultimately the most appropriate answer.