Morantel Tartrate. A broad-spectrum anthelmintic that effectively eliminates the major internal nematode parasites of cattle. Unlike all other single dose cattle dewormers, Rumatel may be administered to lactating dairy cattle with no milk withdrawal. Thus, dairy cattle may be treated with Rumatel at any time, whether dry, pregnant, or lactating. Dosage 0.1 pound per 100 pounds of body weight. Also labeled for dairy goats.