Why is it essential to check for drug–drug interactions on the MAR?

• A. To ensure all medications are from the same manufacturer
• B. To optimize cost and supply management
• C. To prevent adverse effects or reduced efficacy from interactions
• D. To speed up the administration process

Answer: (C)

Preventing harm from drug–drug interactions is the key idea. When medications are given together, one drug can change how another behaves in the body or its effect at the target site. This can lead to adverse effects or a reduced therapeutic response. Checking the MAR before administration helps identify potential interactions so clinicians can adjust the regimen, substitute alternatives, or increase monitoring, thereby protecting the patient and preserving treatment effectiveness. It’s about safety and ensuring each medication works as intended, not about manufacturer sourcing, cost, or speed of delivery.