However, Lithium is considered safe during the second trimester. A special consideration for women during pregnancy is that the use of Lithium may still be necessary for severe episodes of manic depression. ECT can be used during any period of the pregnancy, but is less risky after the first trimester. The most common side effect is short term memory loss, and less frequent side effects include headaches, mild muscle soreness, irregular heartbeat, and adverse reactions to anesthetic or muscle relaxants. Women with mental illnesses are at a higher risk for post-partum difficulties, and it may be advisable to resume medication soon after delivery.
Medications pose a risk for nursing infants, since most can be excreted in breast milk.
Women should discuss with their physicians whether breast feeding is an option, or if bottle feeding will be necessary. There are benefits to breast feeding, but the most important factor is keeping the mother healthy to care for her new infant.