Abstract: A method for treating demyelinating diseases such as MS comprised of administering to an individual afflicted with a demyelinating disease a medicament that induces prolactin secretion. Prolactin secretion stimulates oligodendrocyte precurser cells, which remyelinate demyelinated nerve cells. The medicament is administered at a dosage sufficient to induce prolactin secretion resulting in a hyperprolactinemia. Estrogen, estradiol, estriol, histamine H2-receptor antagonists such as cimetidine, and vitamin D can be administered in conjunction with the prolactin-inducing medicament to further promote the remyelination of the nerve cells.