Advanced Oncology Certified Nurse Practitioner (AOCNP) Certification Practice Test 2026 - Free AOCNP Practice Questions and Study Guide

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Which symptom is NOT associated with SIADH?

Decreased or very dark urine output

Weight gain of more than 5 lbs in two days

Severe headaches

Increased urination

The symptom that is not associated with SIADH is increased urination. In Syndrome of Inappropriate Antidiuretic Hormone (SIADH), the body produces excessive levels of antidiuretic hormone (ADH), leading to water retention and dilutional hyponatremia (low sodium levels in the blood). This results in decreased urine output, often manifested as dark or concentrated urine due to the body retaining water instead of excreting it.

Weight gain over a short period, such as more than 5 lbs in two days, can also occur due to fluid retention. Severe headaches may be a result of hyponatremia, which can lead to cerebral edema and increased intracranial pressure, hence connecting headaches to SIADH symptoms.

Increased urination contradicts the pathophysiology of SIADH, making it the correct choice for the symptom not associated with the condition.

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