It’s a great question. The short answer is that it should be fine to have a Botox treatment while breastfeeding. Check with your medical provider who is administering the Botox to verify that you are following their prescribed care plan and that they are comfortable as they are responsible for your care. The following is an excerpt from a published review regarding this question: No data exist on the medical use of botulin A (botulinum toxin) during breastfeeding. However, it is not detectable systemically after intramuscular use, thus excretion into breast milk is considered unlikely. Since the doses used medically are far lower than those that cause botulism, amounts ingested by the infant, if any, are expected to be small and not cause any adverse effects in breastfed infants. No special precautions are required. - Drugs and Lactation Database (LactMed) [Internet]. Bethesda (MD): National Library of Medicine (US); 2006–. Botulin A. 2020 Sep 21. PMID: 30000459. -Reed Kuehn MD FACS