Which is NOT a typical symptom of dehydration?

In the context of dehydration, increased urine output is not a typical symptom. When the body is dehydrated, it typically responds by conserving water, leading to reduced urine output. This is a protective mechanism to maintain fluid levels in the body. The kidneys decrease urine production in response to signals, such as increased concentration of blood solutes, from hormones like antidiuretic hormone (ADH).

In contrast, rapid heartbeat, confusion, and dizziness are commonly observed symptoms of dehydration. As fluid levels drop, the body struggles to maintain blood pressure and perfusion to vital organs, which can result in an elevated heart rate and cognitive symptoms like confusion or dizziness due to reduced blood flow to the brain. Therefore, increased urine output is inconsistent with the physiological responses to dehydration.