Lab marker · High

High Prolactin: what it means

A Prolactin result above the normal range is considered high. Here is what a raised Prolactin can point to, and when it is worth discussing with a doctor.

Reference range: Men <15; non-pregnant women <25 ng/mL; pregnancy normally elevates

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What a high Prolactin can mean

  • Prolactinoma — pituitary adenoma producing prolactin; values commonly >200 ng/mL.
  • Medication effect — antipsychotics (risperidone, haloperidol), metoclopramide, opiates, oestrogens, some antidepressants.
  • Pregnancy and lactation — physiological.
  • Hypothyroidism — TRH stimulates prolactin too.
  • Polycystic ovary syndrome — modest elevation common.
  • Macroprolactinaemia — biologically inactive complex measured by routine assay; benign.
  • Stress, recent breast exam, vigorous exercise — transient.

When to discuss with a doctor

Persistently elevated prolactin with symptoms (irregular periods, galactorrhoea, infertility, headache, visual changes) warrants endocrinology evaluation and pituitary MRI when very high. Mild elevation in the context of medication should prompt review with the prescribing clinician. Always check TSH alongside.

Conditions this can relate to

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Mediora.AI is informational - interpretation, not a diagnosis. A single out-of-range value is common and often benign; always discuss decisions with your doctor.