You should not breastfeed while taking ibuprofen. Ibuprofen is mainly metabolized by the liver and then excreted through the kidneys, but also metabolized through breast milk. For extended-release medications, the duration of the drug’s effect can be up to 12 hours in the body, and breastfeeding during this time may affect young children. Ibuprofen is an antipyretic and analgesic non-steroidal anti-inflammatory drug that inhibits prostaglandin synthesis, thus providing pain relief, fever reduction and anti-inflammatory effects. If you must take ibuprofen, you should suspend breastfeeding, and you can temporarily express breast milk and replace it with formula feeding until you stop taking the drug. Ibuprofen has more adverse reactions, such as nausea, vomiting, abdominal pain, rash, etc. It should not be used if you are allergic to ibuprofen or other non-steroidal anti-inflammatory drugs, and it should not be used by pregnant women and nursing mothers. It is recommended to use the drug under the guidance of a doctor, not blindly self-medication to avoid adverse effects.