Prolactin Test: What It Shows and What It Does Not
Quick answer: Prolactin is a pituitary hormone linked to milk production. A prolactin test is used when periods stop, there is unexpected milk production, or fertility problems are being evaluated. Many things besides disease can raise it.
About this test
The test measures prolactin in your blood. Levels are normally higher in pregnancy and while breastfeeding.
Why is it ordered?
- Missed or irregular periods.
- Unexpected breast milk production.
- Fertility questions.
- Low sex drive or erectile dysfunction in men.
What results may show
- A high level can go along with a pituitary growth, an underactive thyroid, kidney problems or certain medicines.
- A level in the normal range can help rule out prolactin as a cause of symptoms.
What this test may not show
- Stress, exercise, sleep, a recent meal, breast stimulation and many medicines can raise prolactin, so a mildly high result is often repeated.
- It does not show the cause of a high level.
- A high level does not diagnose a pituitary tumor.
How to prepare
- A morning draw a few hours after waking is common.
- Avoid heavy exercise and breast stimulation before the test. Tell your provider about medicines.
Where you can get this test
| Option | Price | Includes |
|---|---|---|
| Female Hormone Panel | $189 | FSH, LH, estradiol, progesterone, prolactin, TSH, testosterone |
A doctor’s visit is not required to order. Order online, then visit our Buffalo Grove or Lake Zurich location for the sample. Review results with your own healthcare provider.
Related tests
Frequently asked questions
Can stress raise prolactin?
Yes. Stress, exercise, sleep and medicines can raise it, so a mild elevation is often repeated.
What medicines raise prolactin?
Several, including some psychiatric and stomach medicines. Tell your provider what you take.
Does a high prolactin mean a tumor?
Not necessarily. Your provider looks for the cause with further tests when needed.
Sources
Medically reviewed by Rodion Levin, FNP-C, Founder and Medical Director. This page is for general education. It does not diagnose a condition or replace advice from your healthcare provider.
