K1-Apex is a medicine that contains a combination of vitamin K1, which are phylloquinone and apixaban. K1-Apex is used to treat or prevent blood clotting problems. The medicine is used to treat vitamin K deficiency that may occur due to poor nutrition, certain medications, or diseases. It is used to treat or prevent blood clotting problems such as preventing bleeding in people who take certain medications that increase the risk of bleeding. K1-Apex is used to treat bleeding resulting from vitamin K deficiency or other blood clotting problems. The dosage of K1-Apex depends on the person's medical condition and the reason for using the medicine. The person should follow the doctor's or pharmacist's instructions regarding the dosage.