identify the patient by checking the identification - clean the skin before an injection - inject heparin deep into subcutaneous tissue

- Before administering a drug, the nurse should identify the patient by checking the identification band and asking the patient to state his name.

- To clean the skin before an injection, the nurse uses a sterile alcohol swab to wipe from the center of the site outward in a circular motion.

- The nurse should inject heparin deep into subcutaneous tissue at a 90-degree angle (perpendicular to the skin) to prevent skin irritation.