Adults who are unable to consume the recommended 90 to 120 mcg of vitamin K daily may be given an oral vitamin K supplement by a doctor. Treatment with an oral vitamin K supplement may help promote proper blood clotting and may support bone development and cell growth. Discuss the safety of vitamin K supplements with your medical provider before you begin treatment.
Side Effects
Vitamin K generally does not cause side effects in people who use this supplement as directed. Infrequently, certain people may experience mild side effects, including dizziness, skin discoloration, irritability, abnormal swelling, muscle stiffness or pain, excessive sweating or appetite loss. Consult your medical provider for further evaluation and care if these side effects persist or become severe after taking an oral vitamin K supplement.
Hypersensitive Reaction
Vitamin K supplements may induce a severe allergic reaction in people hypersensitive to this nutrient. A hypersensitive reaction may cause chest tightness, wheezing, hives, shortness of breath, facial swelling, dizziness, difficulty swallowing or fainting. Contact an emergency medical provider if you exhibit any of these signs of an allergic reaction upon exposure to vitamin K. In the absence of prompt medical care, vitamin K hypersensitivity may cause fatal medical complications.
Contraindications
Discuss any medical issues or concerns you have with your physician before initiating treatment with vitamin K. Avoid treatment with vitamin K supplements if you have a personal history of liver or kidney diseases or if you are undergoing dialysis treatment. People with these health conditions who use vitamin K supplements may experience an increase in the severity of their symptoms. If you're pregnant or nursing, consult your doctor before using vitamin K supplements.
Medication Interactions
Inform you health care provider of any medications or supplements you are taking before beginning to take oral vitamin K supplements. Concomitant use of vitamin K and warfarin, a blood-thinner, should be avoided. Combining these treatments may reduce the effectiveness of warfarin and cause blood-clotting problems.
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