A nurse who is caring for a preschooler should question a prescription for which of the following antibiotics?

When providing discharge teaching to a client with a prescription for enoxaparin, the nurse should include the instruction to expel the air bubble prior to injecting the medication. Enoxaparin is a type of anticoagulant medication that is administered as a subcutaneous injection.

Here's why the other options are incorrect:

A. Insert the needle at a 45 angle: Enoxaparin is typically administered as a subcutaneous injection, where the needle is inserted at a 90-degree angle (straight into the skin). A 45-degree angle is used for intramuscular injections, but it is not appropriate for enoxaparin administration.

B. Inject the medication into a muscle: Enoxaparin is not intended to be injected into a muscle. It is a low-molecular-weight heparin designed for subcutaneous administration, meaning it is injected just below the skin into the fatty tissue.

C. Rub the injection site following administration: Rubbing the injection site after administering enoxaparin or any other subcutaneous medication is not recommended. Rubbing the site can cause irritation and bruising. Instead, the nurse should apply gentle pressure with a cotton ball or gauze pad for a few seconds after the injection to help minimize bleeding.

A nurse who is caring for a preschooler should question a prescription for tetracycline. Tetracycline is contraindicated in children under 8 years of age due to its potential to cause permanent discoloration and damage to developing teeth and bones. This adverse effect is known as tooth staining or dental hypoplasia.

Let's go through the other options:

A. Azithromycin: Azithromycin is an appropriate antibiotic for use in preschool-age children and is commonly prescribed for various bacterial infections. It does not pose the same risk of tooth staining as tetracycline, making it a safe option for this age group.

C. Cefuroxime: Cefuroxime is another antibiotic that is safe for use in preschoolers. It belongs to the cephalosporin class of antibiotics and is commonly prescribed for respiratory tract infections, skin infections, and other bacterial infections.

D. Gentamicin: While gentamicin is an effective antibiotic, its use in preschool-age children should be carefully monitored. Gentamicin can have potential ototoxic and nephrotoxic effects (damage to the inner ear and kidneys, respectively). However, its use is not strictly contraindicated in this age group, and it can be prescribed when necessary with appropriate monitoring.