Cows secreting abnormal milk were treated with Karuchinomin (an extract from the root of a perennial grass, Coix lacryrnas tobi typica), purasubitan (a proprietary preparation of calcium, magnesium, potassium and sodium salts, caffeine sodiobenzoate, glucose, and vitamin B₁), or sodium propionate to examine the possible influence of these drugs on the quality of milk. As a result, fairly remarkable changes were observed when karuchinomin and purasubitan were administered. Especially, improvement was shown on the chemical composition of milk, suggesting the process of recovery to normal milk.