The parents of a child who is recovering from chickenpox tell the nurse that they gave the child aspirin for his fever.
The nurse would be alert to the development of which of the following?

Choice A rationale:

Tetracyclines are not narrow-spectrum antibiotics. They are broad-spectrum antibiotics. Tetracyclines are effective against a wide range of bacteria, including both Gram-positive and Gram-negative organisms. This is important in treating various infections, but it also means they can disrupt the normal flora of the gut, potentially leading to issues like antibiotic-associated diarrhea.

Choice B rationale:

Tetracyclines may cause permanent discoloration of the teeth in children. This is a well-known adverse effect of tetracycline antibiotics. It primarily occurs in children under the age of 8, whose teeth are still developing. Tetracyclines can bind to calcium ions in teeth, leading to a yellow or grayish discoloration. This is why tetracyclines are generally avoided in children and pregnant women.

Choice C rationale:

Tetracyclines can be used when penicillins are contraindicated. Tetracyclines and penicillins are different classes of antibiotics, and being contraindicated for one does not necessarily mean the other is also contraindicated. Tetracyclines can be an alternative for patients who cannot tolerate penicillins due to allergies or other contraindications.

Choice D rationale:

Tetracyclines are not contraindicated in children younger than 9 years. This statement is not accurate. Tetracyclines are contraindicated in children under the age of 8 due to the risk of tooth discoloration. After the age of 8, tetracyclines can be used in children, but caution is still required.

Choice E rationale:

Tetracyclines are not used to treat influenza. Influenza is caused by viruses, not bacteria, and tetracyclines are antibiotics that target bacteria. Influenza is typically treated with antiviral medications, such as oseltamivir (Tamiflu).

Choice A rationale:

Fever is a common side effect of the influenza vaccine (Fluzone). It's not usually a severe adverse reaction and is typically mild and short-lived. Patients should be informed about this potential side effect so they are aware and can take appropriate measures, such as taking antipyretic medications if needed.

Choice B rationale:

Hypotension is not a common adverse reaction to the influenza vaccine. While vaccines can sometimes cause allergic reactions, leading to symptoms like hypotension, this is very rare. Warning about this potential side effect would not be a priority.

Choice C rationale:

Sedation is not a common adverse reaction to the influenza vaccine. In general, the influenza vaccine is not associated with sedation. This side effect is more likely to be associated with medications or treatments other than vaccines.

Choice D rationale:

Constipation is not a common side effect of the influenza vaccine. Gastrointestinal symptoms like constipation are not typically associated with the influenza vaccine. It's important to focus on informing patients about potential side effects that are more likely to occur.