A nurse is providing discharge instructions to a client who has asthma and is about to start taking theophylline (Theo-24). The nurse should tell the client that this medication might cause which of the following adverse effects?

Robitussin A-C contains codeine, which is an opioid antitussive that can have sedating effects. One of the major disadvantages of using this medication is the potential for drowsiness as a side effect. This can impair the client's ability to perform tasks that require alertness and can interfere with daily activities.
The other options listed are not the major disadvantage of antitussive therapy with Robitussin A-C:
The medication is irritating to the bronchial tree: Robitussin A-C is primarily used as an antitussive (cough suppressant) rather than for its effects on the bronchial tree. While it may have some mild irritant properties due to certain ingredients, it is not considered a major disadvantage of this medication.
The client may use the medication for 14 days: The duration of use for Robitussin A-C is typically determined by the healthcare provider based on the client's condition. While prolonged use of antitussives is generally not recommended without medical supervision, the duration of use is not considered the major disadvantage of this medication.
The medication is very expensive: The cost of medication can vary, and while cost may be a consideration for some individuals, it is not considered the major disadvantage of Robitussin
A-C specifically. The major disadvantage relates more to the potential for drowsiness caused by the medication.

Benzonatate is available in capsule form (such as Tessalon Pearls), and it should be swallowed whole. It is important not to chew, crush, or break the capsules as this can cause adverse effects, including local anesthesia in the oral cavity, which can lead to choking or difficulty swallowing. Swallowing the capsule whole ensures that the medication is released properly in the stomach for the desired effect.

The other options mentioned are incorrect:
A. Eating a high-fat meal prior to taking medication: There is no specific requirement to eat a high-fat meal before taking Benzonatate. However, taking it with food or a glass of water may help with ease of swallowing.

B. Taking medication often and whenever a cough is starting: Benzonatate should be taken as directed by the healthcare provider. It is not recommended to take it more frequently or as needed, as it can lead to an overdose or unwanted side effects.

D. Taking medication with orange juice: There is no specific requirement to take Benzonatate with orange juice. It can be taken with water or other non-alcoholic beverages as directed by the healthcare provider.