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Generic Name: Vitamin K1 ()

Vitamin K1 Reviews

For Vitamin K Deficiency "The administration of this drug caused my 9 pound otherwise completely healthy newborn to get severe jaundice. My newborn had to be under bili lights for 5 days starting one day after administration of the K1 shot at birth. I was not aware this injection comes with a black box warning. I was not aware or told my child was receiving it . If I had known the risks I would have absolutely declined it. It was completely UNNECESSARY!"


"I am a retired nurse. I have been plagued with bruises all over my hands and arms every time I touched or bumped anything. I decided to try Vitamin K1 100 mcg as my multivitamin was only supplying 28% of my daily requirement. I have been taking it for 3 weeks. Not one bruise!"

More about Vitamin K1 (phytonadione)

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  • During pregnancy
  • Drug class: anticoagulant reversal agents
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Patient resources

Other brands

Aquamephyton, Mephyton

Professional resources

  • Vitamin K1 prescribing information
  • Phytonadione (AHFS Monograph)

Other brands

Aquamephyton, Mephyton

Related treatment guides

  • Vitamin K Deficiency
  • Hypoprothrombinemia, Prophylaxis
  • Hypoprothrombinemia, Anticoagulant Induced
  • Hypoprothrombinemia, Not Associated with Anticoagulant Therapy