A nurse is collecting data from a client who has a new prescription for amoxicillin.
Which of the following findings indicates that the client is having an allergic reaction to the medication?

Choice A rationale:

Instructing the client to chew the medication is not recommended for enteric-coated tablets as it could result in stomach upset or damage to the protective coating.

Choice B rationale:

Placing the medication on the client’s tongue allows for easier swallowing without compromising the integrity of the enteric coating.

Choice C rationale:

Dissolving the medication in juice is not recommended as it could damage the enteric coating and result in stomach upset.

Choice D rationale:

Placing the medication between the client’s cheek and gum is not typically recommended for enteric-coated tablets as it could result in discomfort or damage to the protective coating.

Choice A rationale:

Dry mouth is a common side effect of diphenhydramine. Diphenhydramine is an antihistamine that is often used to treat allergies, insomnia, and symptoms of the common cold. It works by blocking the effects of histamine, a substance in the body that causes allergy symptoms. One of the effects of histamine is increased salivation, so when diphenhydramine blocks this effect, it can lead to dry mouth.

Choice B rationale:

Nausea is also a common side effect of diphenhydramine. This can occur because diphenhydramine can slow down the emptying of the stomach, leading to feelings of nausea. Additionally, diphenhydramine can affect the vestibular system in the inner ear, which can also lead to feelings of nausea.

Choice C rationale:

Agitation is considered an idiosyncratic reaction to diphenhydramine. An idiosyncratic reaction is an unusual or unexpected reaction to a drug that is not related to the usual pharmacological action of the drug. While diphenhydramine is typically used for its sedative effects, in some cases it can cause paradoxical central nervous system stimulation, leading to agitation.

Choice D rationale:

Dizziness is another common side effect of diphenhydramine. This occurs because diphenhydramine can affect the vestibular system in the inner ear, which plays a key role in maintaining balance. When this system is affected, it can lead to feelings of dizziness.