Lecithin has been recommended to combat recurrent plugged ducts. The usual recommended dosage for recurrent plugged ducts is 3600-4800 mg lecithin per day, or 1 capsule (1200 milligram) 3-4 times per day. After a week or two with no blockage, mom can reduce the dosage by one capsule. If there is no blockage within another 2 weeks she can reduce it again by one. Mom may need to continue taking 1-2 capsules per day if stopping the lecithin leads to additional plugged ducts.