1,074 Swamp Milkweed Root Medicinal A tea made from the roots is anthelmintic, carminative, diuretic, emetic, strongly laxative and stomachic. The tea is said to remove tapeworms from the body in one hour. It has also been used in the treatment of asthma, rheumatism, syphilis, worms and as a heart tonic. An infusion of the roots is used as a strengthening bath for children and adults 2,339