2-methyl-1

 Mainly suitable for coagulopathy caused by vitamin K deficiency. Such as vitamin K deficiency caused by intestinal malabsorption. Obstructive jaundice, chronic ulcerative colitis, chronic pancreatitis, and reduced intestinal absorption after extensive small bowel resection caused by various reasons; long-term use of antibiotics can lead to vitamin K deficiency in the body, broad-spectrum antibiotics or intestinal sterilization drugs can Kill or inhibit the bacterial community in the normal intestinal tract, resulting in the reduction of vitamins synthesized by the bacteria in the intestinal tract.