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Vitamin B-12 Injection

This product requires a veterinary prescription.
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$7.79 - $45.59
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Vitamin B-12 Injection
Product Information
Vitamin B-12 Injection (cyanocobalamin) is used to treat vitamin B-12 deficiency in animals with pernicious anemia and other conditions.
Dogs, Cats, Horses
Generic Name
Brand Names
Vitamin B-12
Drug Class
Product Description & Form
*Vitamin B-12 Injection is a generic medication, and therefore we may have different manufacturers at any given time. 
Vitamin B-12 Injection 1000 mcg/ml, 1 ml: red colored clear solution. (Manufacturer Somerset: NDC 70069-0005-10)
Vitamin B-12 Injection 3000 mcg/ml, 100 ml: red colored clear solution. (Manufacturer Vedco: NDC 50989-0427-12)
  • Vitamin B-12 Injection is a man-made form of vitamin B-12
  • Important for growth, cell reproduction, blood formation, and protein and tissue synthesis
Active Ingredients
Inactive Ingredients
Vitamin B-12 Injection 1000 mcg/ml: benzyl alcohol, sodium chloride, hydrochloric acid, sodium hydroxide, water. (NDC 70069-0005-10)
Vitamin B-12 Injection 3000 mcg/ml: sodium chloride, ammonium sulfate, citric acid, sodium citrate, benzyl alcohol. (NDC 50989-0427-12)
Vitamin B-12 Injection should be given to your pet as directed by your veterinarian. Use aseptic techniques when withdrawing each dose to decrease the possibility of post-injection bacterial infections. Adequately clean and disinfect the stopper prior to entry with a sterile needle and syringe. Injectable medications require needles and syringes.  Those items are purchased separately.  Please ask your veterinarian for a recommendation for the correct needle/syringe sizes for your pet. Use only sterile needles/syringes and use each needle/syringe only once. Dispose the needle/syringe immediately in a proper sharps disposal container. Sharps containers are sold separately.
Missed Doses
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 2 doses at once.
Side Effects
Side effects may include swelling, rapid weight gain; diarrhea; or itching or mild rash.
Other side effects may occur. If you notice anything unusual, contact your veterinarian.
Drug & Food Interactions
Make sure to tell your veterinarian what other medication you are giving to your pet. Quite often your veterinarian may prescribe two different medications, even if a drug interaction may occur. In this case, your veterinarian may vary the dose and/or monitor your pet more closely.
This medication does not have an FDA approved indication for use in animals,  but it is a  common and acceptable practice for veterinarians to prescribe this human medication for use in animals.
Allergic reactions to medications may occur. Be sure to inform VetSource and your veterinarian if your pet has any known drug sensitivities or allergies. If your pet displays symptoms of an allergic reaction, call your veterinarian immediately or go to a veterinary emergency clinic. Symptoms may include but are not limited to: swollen lips, tongue, face, airways; difficulty breathing; agitation; profuse salivation; widespread hives and itching.
Adverse Reactions
If you are concerned that your pet has experienced an adverse reaction to this medication, please contact Vetsource customer service at 877-738-4443.
Store at 68°F to 77°F in controlled room temperature. Keep this medicine out of reach of children. Store in a childproof container. 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.
Sourced directly from the manufacturer or their approved distributor. Guaranteed genuine product backed by the manufacturer.


Nutritional Info