Phytonadione (Vitamin K1)

By Lifelearn Inc.


Why has my veterinarian prescribed this medicine?

Phytonadione is used to treat animals that have been poisoned with warfarin or bishydroxycoumarin. These poisons may result in bleeding problems in the animal. This medication helps to stop bleeding. Phytonadione may be used for other conditions as prescribed by your veterinarian.

How do I give this medication?

"Give this medication with food, preferably foods high in fat content."
  • Give this medication to your pet as directed by your veterinarian. READ THE LABEL CAREFULLY.
  • Try to give this medication at about the same time each day, preferably prior to feeding.
  • Give this medication with food, preferably foods high in fat content.
  • DO NOT give the pet more medicine than directed and do not give more often than directed.
  • DO NOT discontinue the medication without first checking with your veterinarian. Contact your veterinarian ahead of time if repeat medication is required.
  • Try not to miss giving any doses.
  • During the treatment period, try to keep the animal quiet.

What do I do if I miss giving a dose?

Give the dose as soon as possible. If it is almost time for the next dose, skip the missed dose, and continue with the regular schedule. Do not give the pet two doses at once.

How do I store this medicine?

  • Keep this medicine out of reach of children.
  • Store this medicine in a cool, dry place at room temperature. Store away from heat and direct sunlight.
  • Do not store this medicine in the bathroom, near the kitchen sink or in damp places. The medicine may break down if exposed to heat or moisture.

What are the potential side effects?

  • If this medication is given as an injection, there may be some bleeding at the injection site. Anaphylactic reactions have been reported after intravenous injection.
  • Other side effects may occur. If you notice anything unusual, contact your veterinarian.

Are there any possible drug interactions?

  • Make sure to tell your veterinarian if you are giving your pet any other medication or supplements.
  • Quite often, your veterinarian may prescribe two different medications, and sometimes a drug interaction may be anticipated. If this occurs, your veterinarian may vary the dose and/or monitor your pet more closely.
  • The following drugs can potentially interact with phytonadione (vitamin K1): Coumarin, indandione agents, phenylbutazone, aspirin, chloramphenicol, sulfonamides, diazoxide, allopurinol, cimetidine, metronidazole, anabolic steroids, erythromycin, ketoconazole, propranolol, thyroid drugs, and mineral oil.
  • Contact your veterinarian if your pet experiences any unusual reactions when different medications are given together.

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