For instance, if your doctor has prescribed a short-term medication which is not safe for use during breastfeeding, you may have to pump your milk and discard it until it is clear of the medication. By pumping during the times that your baby would normally nurse, you can maintain your milk production and resume breastfeeding. The milk can be discarded until the physician or nurse advises you to resume nursing.
Some mothers pump and dump for several days, other for just a few.