A nurse is teaching an adolescent about medication therapy with oral acetylcysteine. Which of the following information should the nurse include in the teaching?

Rebound congestion, also known as rhinitis medicamentosa, is a common adverse effect associated with the prolonged use of nasal decongestants. It occurs when the blood vessels in the nasal passages become dependent on the medication for constriction and lose their ability to regulate naturally. As a result, when the medication wears off, the nasal congestion worsens, leading to a cycle of continued use and worsening symptoms.

In this scenario, the patient's complaint of worsening nasal congestion despite using oxymetazoline every 2 to 4 hours for the past 5 days suggests the possibility of rebound congestion. The nurse should explain to the patient that prolonged or frequent use of nasal decongestants can lead to this effect and recommend gradually tapering off the medication use or discontinuing it altogether. The nurse may also suggest alternative non-medication strategies for managing nasal congestion, such as saline nasal sprays or steam inhalation.

Expectorants are medications that help thin and loosen mucus in the respiratory tract, making it easier to cough up and clear from the airways. Increasing fluid intake, particularly water helps to keep the mucus thin and less sticky, facilitating its removal. Adequate hydration can help promote effective expectoration and relieve congestion.

The other options are incorrect because:

B. Taking the medication once a day only, usually at bedtime: The dosing frequency and timing of expectorants can vary depending on the specific medication prescribed. It is important to follow the healthcare provider's instructions regarding the dosing schedule.

C. Increase fiber and fluid intake to prevent constipation: This instruction is unrelated to expectorant use. Increasing fiber and fluid intake is commonly recommended to promote regular bowel movements and prevent constipation, but it is not directly related to expectorant therapy.

D. Restrict fluids to decrease mucus production: Restricting fluids can lead to dehydration and thickening of mucus secretions. It is important to stay adequately hydrated to maintain thin and easily expectorated mucus. Restricting fluids is not recommended for managing mucus production.