Mary Beth,
     A source for information on prolactin levels in relation to inappropriate lactation is Williams Textbook of Endocrinology.  Sometimes going to the non-lactation speciality, rather than to lactation-specific texts, will provide additional information.  I don't have the publisher details for the above text, but a good library would have it.  The old edition I accessed in a medical library mentions that some women's breast tissue is particularly sensitive to prolactin, with the result that galactorrhoea can occur with prolactin levels within the "normal" range.
     The fact that this woman has apparently *suddenly* developed galactorrhoea should indicate the need for a complete neurological workup - a referral to a good neurologist for a second opinion.  Is she a lot thirstier now?  What other differences is she experiencing?  All these should be reported to her new doctor.  What comes to mind is a pituitary tumour, but only a thorough neurological investigation will confirm or eliminate this possibility.
     I hope this helps.
                  Virginia
              ( o )( o )
                 This is not a substitute.

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