A patient has been taking senna (Senokot) for several days, and the nurse notes that the urine is yellowish-brown. What does the nurse know about this symptom?
a. It indicates that renal failure has occurred.
b. It is caused by dehydration, which is a laxative side effect.
c. It is a sign of toxicity, indicating immediate withdrawal of the drug.
d. It is an expected, harmless effect of senna.
ANS: D
Systemic absorption of senna, followed by renal excretion, may impart a harmless yellowish-brown or pink color to the urine. This symptom is not an indication of renal failure, dehydration, or toxicity.
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