A nurse discovers that a client has been administered a higher dose of oxybutynin than the prescription indicates. The nurse should assess the client for which of the following adverse effects?

The nurse should include the statement that rifampin can cause the client's urine to turn orange. Rifampin is an antibiotic commonly used to treat tuberculosis and other bacterial infections. One of its common side effects is discoloration of bodily fluids, including urine, saliva, sweat, and tears. This discoloration is harmless and is not a cause for concern. Informing the client about this side effect helps prevent unnecessary worry or alarm.

"You should take this medication with food" (B) is not specifically related to rifampin. However, taking rifampin with food can help reduce gastrointestinal side effects such as stomach upset or nausea.

"This medication can cause insomnia" (C) is not a common side effect of rifampin. Insomnia is more commonly associated with certain other medications or medical conditions.

"You should take a stool softener with this medication" (D) is not necessary for rifampin. Stool softeners are typically used to alleviate constipation, but rifampin does not commonly cause constipation as a side effect.

Therefore, the nurse should primarily include the statement that rifampin can cause the client's urine to turn orange.

Furosemide is a loop diuretic commonly used to treat fluid volume excess by promoting diuresis. One of the expected outcomes of furosemide administration is an increased urinary output as excess fluid is eliminated from the body. Therefore, if the medication has been effective, the nurse would expect to see an increased urinary output as a result of the diuretic effect.

Increased respiratory rate (B) is not an expected outcome of furosemide administration. It may occur in some cases due to increased fluid elimination and potential electrolyte imbalances, but it is not the primary indicator of the medication's effectiveness.

Decreased blood pressure (C) is a possible outcome of furosemide administration due to the diuretic effect and subsequent reduction in fluid volume. However, it is not the most specific indicator of the medication's effectiveness in this case.

Increased pulse (D) is not a typical finding associated with the effectiveness of furosemide. In fact, furosemide can sometimes cause a decrease in heart rate due to its impact on fluid and electrolyte balance.