Explanation
• With an elevated INR of 3.9, the patient is at risk for bleeding.
• Muscles are highly vascular, and due to the patient's high INR, this intramuscular (IM) route should be avoided due to the risk of bleeding and hematoma formation.
• Another method of administration (PO, IV, subcutaneous injection) would be used for this patient. Morphine is available in a wide variety of forms for administration to include liquid, tablets, extended-release capsules,injections, and suppositories.