A nurse is caring for a client who is receiving tobramycin. The nurse should monitor the client for which of the following adverse effects?

A. "This is an expected adverse effect of the medication." Rifampin commonly causes red-orange discoloration of bodily fluids, including saliva, tears, urine, and sweat. This occurs due to the drug's excretion and is harmless. It does not indicate internal bleeding or organ dysfunction. Clients should be educated about this side effect in advance to prevent alarm and unnecessary discontinuation of the medication, as adherence to tuberculosis treatment is crucial.

B. "Stop taking the medication. You are having an allergic reaction." The red discoloration caused by rifampin is a known side effect, not an allergic reaction. A true allergic response would include symptoms such as rash, itching, swelling, or difficulty breathing. Stopping rifampin without medical advice could disrupt tuberculosis treatment, leading to drug resistance or treatment failure, making this an inappropriate recommendation.

C. "This condition will only last a couple of days." The discoloration of bodily fluids persists throughout the duration of rifampin therapy. Tuberculosis treatment can last several months, so the client should expect this effect to continue as long as they are taking the medication. Providing incorrect information may cause the client to worry unnecessarily when the discoloration does not resolve quickly.

D. "Taking the medication with red meat will cause this adverse effect." The discoloration is due to rifampin’s chemical properties and metabolism, not dietary intake. Red-colored foods, such as red meat or berries, do not influence this effect. Providing inaccurate dietary information may lead to unnecessary dietary restrictions, which are not needed for managing this side effect.

A. Aspirate before injecting the medication. Aspirating before injecting heparin is not recommended because it can cause tissue trauma and increase the risk of hematoma formation. Heparin is administered into the subcutaneous tissue, which has fewer blood vessels than intramuscular tissue, making aspiration unnecessary. Aspiration can also lead to bruising and discomfort, which should be minimized when administering anticoagulants.

B. Use a 25-gauge, 1/2-inch needle to administer the medication. Heparin should be administered using a small-gauge (25- to 27-gauge) needle with a length of 1/2 to 5/8 inch to reduce tissue trauma and minimize the risk of bleeding. The small needle size helps ensure that the medication is delivered into the subcutaneous tissue rather than deeper layers. Proper needle selection is important to prevent bruising and irritation, which are common concerns when administering anticoagulants.

C. Administer the medication within 2 cm (1 in) of the umbilicus. Heparin should not be injected near the umbilicus because this area has a higher density of blood vessels and an increased risk of bruising. The preferred injection sites are the abdomen (at least 5 cm or 2 inches away from the umbilicus), the upper outer thigh, or the outer upper arm. Injecting in these areas ensures proper absorption while minimizing complications such as hematoma formation.

D. Massage the site after injecting the medication. Massaging the injection site after administering heparin is contraindicated because it can lead to increased bruising, tissue irritation, and the potential for excessive bleeding. Instead of massaging, gentle pressure can be applied with a gauze pad if necessary to control minor bleeding. Clients should be advised to avoid rubbing or applying unnecessary pressure to the injection site to reduce the risk of local complications.