Final answer:
Diphenhydramine, an antihistamine used for treating urticaria and other allergy symptoms, can cause side effects such as drowsiness, dry mouth, dizziness, and blurred vision. The nurse should inform the client about these potential side effects, which are important to know, especially when undertaking tasks that require alertness.
Step-by-step explanation:
A client taking diphenhydramine for urticaria, which is related to environmental allergies, may experience several side effects as a result of this over-the-counter medication. Diphenhydramine is an antihistamine commonly used to treat symptoms of allergies, such as watery, itchy eyes, swollen tissues, and sneezing. There are various types of allergic reactions, including but not limited to seasonal allergies like hay fever, food allergies to items such as shellfish and peanuts, and skin conditions like hives and eczema.
The side effect that the nurse should notify the client about might include drowsiness, as diphenhydramine is known to cause sedation. Other common side effects include dry mouth, dizziness, and blurred vision. It is important for clients to be aware of these potential side effects, especially if they will be driving or operating machinery after taking the medication. They should also be advised that consuming alcohol can enhance these side effects.
In summary, while diphenhydramine is effective in managing symptoms of allergies, it does come with side effects that clients should be made aware of.