250 ml. You need to boil the water first, and then simmer 10- 15 minutes. Boil 3 grams of antelope horn silk in 250 ml of water. Antelope horn has the effects of clearing away heat and cooling blood, purging fire and detoxicating, and clearing heart fire, and can be used to treat diseases caused by blood heat or excessive heart fire in the body. Antelope horn belongs to animal medicine and is a precious animal medicine.