Livestock > Livestock Supplies Durvet Magmilax Powder 25LB Price $91.80 Stock status: Out of Stock Stock status: In Stock Product Code: RJ170-2002 Qty: Description Sizing Information Reviews Durvet Magmilax Powder is a mild laxative and antacid for use in beef and dairy cattle, sheep and goats with simple indigestion. Each lb contains 10.35 oz magnesium hydroxide. Dosage: Cattle – mix 1 lb powder with 1 gallon water, administer as a drench or via stomach tube; Sheep/goats/calves – administer 16-32 oz depending on size of animals. Frequent or continued use should be avoided. 12 hour milk withdrawal.