Diagnostics·Diagnostics
Prolactin blood test
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A prolactin blood test measures the level of a hormone called prolactin in your blood. Prolactin is made by a small gland in your brain called the pituitary gland. This test helps doctors check for conditions that affect prolactin levels, such as pituitary tumors or problems with your menstrual cycle or fertility.
Key facts
Prolactin blood tests are fairly common, especially when someone has symptoms like irregular periods, infertility, or unexpected breast milk production.
Both men and women can have abnormal prolactin levels. It is more often tested in women of childbearing age, but it can affect people of any age or gender.
Diagnosis usually starts with a prolactin blood test. If your level is high, your doctor may order more tests to find the cause, such as imaging of the pituitary gland.
The blood test is quick. You may need to avoid eating or certain medications for a few hours beforehand. The doctor will explain the results and what they mean for your health.
Treatment for high prolactin depends on the cause. If it's due to a medication, your doctor may adjust the dose or switch to another medicine. A small pituitary tumor is often treated with medications that lower prolactin levels. In rare cases, surgery may be needed.
Doctors often prescribe a type of medication that helps the brain reduce prolactin production. These are usually tablets taken regularly. Your doctor will monitor your levels and adjust treatment as needed. Never stop or change medications without speaking to your doctor.
Surgery to remove a pituitary tumor may be considered if the tumor is large, causing vision problems, or not responding to medication.
Most people with abnormal prolactin levels lead normal lives. You may need regular blood tests and doctor visits to monitor levels and adjust treatment.
A balanced diet and regular physical activity support overall health. There is no special diet for prolactin issues, but staying healthy helps your body respond better to treatment.
Hormone imbalances can affect your mood, energy, and stress levels. It is normal to feel anxious or frustrated. Talk to your doctor or a mental health professional if you need support.
Most causes of high prolactin cannot be prevented. However, managing stress, avoiding certain medications if possible, and keeping your thyroid healthy may help reduce risks.
Routine screening for high prolactin is not recommended for everyone. Testing is done only if you have symptoms or specific risk factors.
The outlook is very good for most people. With proper treatment, prolactin levels usually return to normal, symptoms improve, and you can live a full and healthy life.
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Always verify with your doctor
Health guidelines vary by country and region. The information in this article is based on international clinical guidelines but may not reflect the specific guidelines, medications, or practices in your country. Always discuss your health concerns with your own doctor or healthcare provider, and refer to your local national health guidelines where available.
Important notice This information is for educational purposes only. It does not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider about your specific situation. If you are experiencing a medical emergency, call your local emergency services immediately.
This article is educational and is prepared with reference to recognized health information and clinical guidance sources where available. Specific source links may vary by topic.
Last updated: July 8, 2026
Educational note: This information is for education only and is not a diagnosis.
Use it to support, not replace, advice from a licensed clinician.
If symptoms are severe, worsening, or urgent, call your local emergency number or seek emergency care.