American journal of perinatology
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Breast engorgement and galactorrhea occasionally occur during tocolysis with ritodrine. We are not aware of breast engorgement and galactorrhea associated with other tocolytics. ⋯ Breast engorgement and galactorrhea gradually subsided after magnesium sulfate was discontinued. The rapid disappearance of both the galactorrhea and the breast engorgement after discontinuation of magnesium sulfate treatment suggests a cause-effect relationship, the mechanism of which remains unclear.