Prolactin

About This Test
Prolactin is a pituitary hormone. High levels can cause menstrual changes, infertility, or nipple discharge; in men it can lower testosterone. Testing helps explain these symptoms treatment prognosis.

Patient Preparation
Fasting not required.

Best Time to Test
Morning preferred, but can also be done anytime.

Tests Included
Prolactin

Why is it done
Fatigue, weight or mood changes, or menstrual/sexual symptoms.
Suspected adrenal, pituitary, or gonadal disorders.
Monitoring hormone therapy or endocrine treatments.
Clarifying abnormal results from prior tests.
Often included in routine check‑ups to find issues early.