Advil is a brand name for the nonsteroidal anti-inflammatory drug (NSAID) ibuprofen [1]. According to the Mayo Clinic, ibuprofen is generally considered safe to use while breastfeeding [2]. However, Healthline warns that some studies have suggested that NSAIDs, including ibuprofen, may reduce milk production [3].

The American Academy of Pediatrics (AAP) considers ibuprofen to be compatible with breastfeeding [2]. However, the AAP recommends that nursing mothers take the lowest effective dose of any medication and avoid taking medications for an extended period [2]. Additionally, the Mayo Clinic advises nursing mothers to take ibuprofen immediately after breastfeeding to allow for the drug to be metabolized before the next feeding [2].

In conclusion, Advil, which contains ibuprofen, is generally considered safe to use while breastfeeding. However, nursing mothers should take the lowest effective dose and avoid taking the medication for an extended period. Additionally, mothers should take ibuprofen immediately after breastfeeding to allow for the drug to be metabolized before the next feeding.

Sources:
[1] Drug Patent Watch. Advil. https://www.drugpatentwatch.com/p/tradename/ADVIL
[2] Mayo Clinic. Breastfeeding and medications: What's safe? https://www.mayoclinic.org/healthy-lifestyle/infant-and-toddler-health/in-depth/breastfeeding-and-medications/art-20043975
[3] Healthline. Is It Safe to Take Ibuprofen While Breastfeeding? https://www.healthline.com/health/parenting/ibuprofen-breastfeeding