Is lithium orotate safe to use while breastfeeding?

Lithium Orotate and Breastfeeding

Lithium orotate should not be taken while breastfeeding. Although lithium orotate is marketed as a dietary supplement with lower lithium content than pharmaceutical lithium salts, it still delivers lithium that will be excreted into breast milk and expose the infant to potential toxicity.

Why This Recommendation

FDA Labeling on Lithium and Breastfeeding

The FDA labeling for lithium products is unequivocal: "Nursing should not be undertaken during lithium therapy except in rare and unusual circumstances where, in the view of the physician, the potential benefits to the mother outweigh possible hazard to the infant or neonate." 1 The label specifically warns that lithium is excreted in human milk and that signs of lithium toxicity including hypertonia, hypothermia, cyanosis, and ECG changes have been reported in infants and neonates.

The Lithium Orotate Problem

While lithium orotate contains less elemental lithium than pharmaceutical preparations (lithium carbonate, lithium citrate), it is still a source of systemic lithium. The 2021 toxicological evaluation of lithium orotate 2 examined its safety profile but did not evaluate its use during breastfeeding. Importantly, any form of lithium will:

• Transfer into breast milk (milk-to-plasma ratios range 0.24-0.66 for lithium) 3
• Accumulate in infant serum
• Potentially affect infant renal and thyroid function

Evidence from Pharmaceutical Lithium Studies

Recent research on pharmaceutical lithium during breastfeeding provides critical context:

Infant Exposure Patterns:

• A 2022 Swedish study found infant serum lithium concentrations were highest in the first month of life, with some infants showing unexpectedly high levels (up to 1.2 mmol/L) 4
• Infant lithium levels can exceed maternal levels in early weeks 4
• A 2023 study demonstrated that lithium in breast milk affects renal electrolyte balance and reduces nephrin expression in kidneys, with elevated urea nitrogen and reduced thyroid function 5

Clinical Outcomes:

• While some studies report no adverse effects with strict monitoring 6, 4, 7, these involved pharmaceutical lithium with therapeutic drug monitoring
• Poor weight gain has been documented 4
• Renal and thyroid effects occur even with monitored exposure 5

Critical Distinctions for Lithium Orotate

The supplement form poses unique dangers:

1. No therapeutic monitoring infrastructure: Unlike pharmaceutical lithium where maternal and infant serum levels are routinely checked, lithium orotate users typically have no monitoring
2. Unknown dosing: Supplement formulations vary widely in elemental lithium content
3. False sense of safety: Marketing as a "natural" or "safer" form of lithium creates dangerous misconceptions
4. No medical supervision: Most users take it without psychiatric oversight

Common Pitfalls to Avoid

• Don't assume "orotate" makes it safer: The orotate salt may have different absorption characteristics, but once absorbed, lithium is lithium
• Don't rely on "low dose" claims: Even the monitored studies showing relative safety involved strict protocols, regular lab work, and medical supervision that supplement users lack 4, 8
• Don't confuse research on pharmaceutical lithium with supplement safety: Studies showing acceptable outcomes involved full-term healthy infants, therapeutic drug monitoring, and close medical follow-up 6, 4, 7

The Bottom Line

If a breastfeeding mother is taking lithium orotate, she should:

• Discontinue the supplement immediately
• Consult with a psychiatrist if she has bipolar disorder requiring mood stabilization
• Consider evidence-based alternatives that are compatible with breastfeeding

If lithium therapy is medically necessary for bipolar disorder, pharmaceutical lithium under strict medical supervision with regular monitoring of both maternal and infant serum levels, renal function, and thyroid function may be considered in rare circumstances 1, 4. However, this decision requires psychiatric consultation and is not applicable to over-the-counter lithium orotate supplements.

The AAP guidelines emphasize that most maternal medications are compatible with breastfeeding, but specifically note that comprehensive medication safety information should be obtained from LactMed 9. LactMed and FDA labeling both advise against lithium use during breastfeeding except under exceptional medical circumstances with intensive monitoring.