Which of the following symptoms can indicate high prolactin levels?

High prolactin levels, a condition known as hyperprolactinemia, can lead to several symptoms due to the hormone's role in regulating reproductive functions. Elevated prolactin can disrupt normal hormonal balance, resulting in reproductive issues.

The symptoms associated with high prolactin levels include low libido, which presents as a decreased interest in sexual activity, and erectile dysfunction in males, both of which stem from the hormone's interference with testosterone levels. In females, high prolactin can lead to vaginal dryness, making sexual activity uncomfortable and further contributing to a reduction in libido. Thus, the presence of these symptoms clearly links to the effects of elevated prolactin levels on reproductive health.

In contrast, while other options may include symptoms such as fatigue or mood disturbances, these are not as directly indicative of high prolactin levels and may arise from a variety of other conditions or factors. Therefore, the specific symptoms of low libido, erectile dysfunction, and vaginal dryness are more characteristic indicators of elevated prolactin levels.