Fornidd: To date, no relevant epidemiological data are available. Animal studies do not indicate harmful effects with respect to pregnancy, embryonal or fetal development, parturition or postnatal development (see Pharmacology: Toxicology: Preclinical Safety Data under Actions). When the patient plans to become pregnant and during pregnancy, diabetes should not be treated with metformin but insulin should be used to maintain blood glucose levels as close as to normal as possible in order to lower the risk of fetal malformations associated with abnormal blood glucose levels.
Metformin is excreted into milk in lactating rats. Similar data is not available in humans and a decision should be made whether to discontinue nursing or discontinue metformin, taking into account the importance of the compound to the mother.
Fornidd XR: Lactation: Studies have not been conducted in nursing mothers, but caution should be exercised in such patients, and a decision should be made to discontinue nursing or to discontinue the drug, taking into account the importance of the drug to the mother.