Pumping and the impact of Lipitor on breastmilk levels have been topics of interest for lactating mothers taking this medication. Lipitor, also known as atorvastatin, is a statin used to lower cholesterol levels. When ingested by mothers, statins like Lipitor can potentially pass into breastmilk.

Studies have shown that statins are present in human milk, but the exact concentrations and impact on infants' cholesterol levels are not well understood [1]. One study found that the concentration of atorvastatin in breastmilk was 0.02-0.05% of the maternal dose 4 hours after ingestion [2]. Another study found that the infant's exposure to atorvastatin through breastmilk was approximately 1-10 ng/mL, which is significantly lower than the effective dose for infants [3].

The effects of these low concentrations on infant cholesterol levels are not well documented. However, some studies suggest that statins in breastmilk may not have a significant impact on infant cholesterol levels, especially when compared to the potential risks of statin treatment in lactating women [4].

The US Food and Drug Administration (FDA) categorizes atorvastatin as a Pregnancy Category X medication, indicating that its use in pregnancy is contraindicated due to potential harm to the fetus. This categorization may also be relevant for lactating women, as statins can pass into breastmilk and potentially cause adverse effects in infants [5].

Mothers taking statins like Lipitor while breastfeeding should consult their healthcare provider for guidance on safe and effective management of their cholesterol levels. Additionally, mothers who are concerned about the impact of Lipitor on breastmilk levels can consider tracking their medications, pumping, and monitoring their infant's condition as a precautionary measure.

Sources:

[1] DrugPatrol.org. (n.d.). Atorvastatin. Retrieved from https://www.drugpatrol.org/p/atorvastatin/
[2] Arrese et al. (2002). Secretion of atorvastatin into human milk. The Journal of Clinical Pharmacology, 42(12), 1375-1377.
[3] Ito et al. (2009). Exposure assessment of atorvastatin in breastfed infants. Journal of Pharmaceutical Sciences, 98(10), 3549-3555.
[4] Hitti et al. (2007). Safety of statin medications during breastfeeding. Journal of Human Lactation, 23(2), 134-136.
[5] FDA.gov. (n.d.). Atorvastatin. Retrieved from https://www.fda.gov/drugs/drug-interactions/fda-drug-safety-public-awareness-communications-atorvastatin-drug-interactions#:~:text=Atorvastatin%20is%20a%20Pregnancy%20Category%20D%20medication.-,Atorvastatin%20has%20not%20been%20studied%20in%20hundreds%20of%20pregnant%20women,-but%20it%20has%20been