You should not breastfeed after taking loratadine orally. Loratadine is a western drug preparation, which is a systemic antihistamine. Loratadine is absorbed into the bloodstream through the gastrointestinal tract and can be secreted through breast milk, so it is not recommended to take loratadine orally during breastfeeding. Loratadine is often used in the treatment of allergic rhinitis, and sometimes it can also be used in the treatment of allergic dermatosis, itchy dermatitis. If a breastfeeding woman develops allergic rhinitis or atopic dermatitis and needs medication, it is best to talk to your doctor to see if you can switch to a topical medication. Topical medications have less of an effect on milk production than oral medications. If oral loratadine is necessary for breastfeeding, it is best to stop taking the medication for 2-3 days before breastfeeding.