Rx B12
Starting At
$22.95
Rx B12
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Usually ships the same weekday before 3pm CT.
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Cats and small dogs: 1 mL per day
Medium sized dogs (25 to 50 lbs): 2 mL per day
Large sized dogs (51-100 lbs): 3 mL per day -
Cats: 1/4 mL Daily
Dogs <22 lbs: 1/4 mL Daily
Dogs 22-44 lbs: 1/2 mL Daily
Dogs 44-110 lbs: 1 mL Daily
Dogs >110 lbs: 2 mL Daily
What is Rx B12 and Rx B12 Forte for Dogs and Cats?
- Rx B12 is a nutritional supplement for dogs and cats that contains pure cyanocobalamin, a man-made form of vitamin B12.
- Rx B12 is a beef-liver flavored, palatable liquid.
Why is Rx B12 used for dogs and cats?
- Vitamin B12 is not produced by the body but is an essential part of cell reproduction, blood formation, and protein synthesis.
- Rx B12 may be given to animals with a deficiency due to illness or disease or to replace missing nutrients from their daily diet.
- Rx B12 is labeled for use as an oral source of cobalamin to increase serum cobalamin levels in dogs and cats.
What else should I know about Rx B12 and Rx B12 Forte?
- Consult with your veterinarian before using this product, and follow their guidelines for use.
- A vitamin B12 test is recommended in order to establish safe and effective administration levels.
- Store at room temperature out of direct sunlight.
- Rx B12 contains 250 mcg/ml of Vitamin B12.
- Rx B12 Forte contains 1,000 mcg/ml of Vitamin B12.
What problems could my dog or cat have with Rx B12 and Rx B12 Forte?
- Safe use in pregnant animals or animals intended for breeding has not been proven.
- If an animal’s condition worsens or does not improve, stop product administration and consult your veterinarian.
- An examination from a veterinarian is recommended prior to using this product.
How do I use Rx B12 and Rx B12 Forte?
Rx B12
- Cats and Small Dogs – 1 ml per day
- Medium Sized Dogs (25-50 lbs) – 2 ml per day
- Large Sized Dogs (50-100 lbs) – 3 ml per day
Rx B12 Forte
- Cats – 1/4 ml daily
- Dogs less than 10 kg – 1/4 ml daily, Dogs 10-20 kg – 1/2 ml daily, Dogs 20-50 kg – 1 ml daily, Dogs > 50 kg – start at 2 ml daily for a month and recheck B12 levels and taper based on serum levels.
What is in Rx B12 and Rx B12 Forte?
Rx B12
- Active Ingredients per 1.0 ml: Vitamin B-12 (cyanocobalamin) 250 mcg
- Inactive Ingredients: Vegetable glycerin, water, fructose, natural flavorings, and potassium sorbate.
Rx B12 Forte
- Active Ingredient: Vitamin B-12 (cyanocobalamin) 1000 mcg/ml
- Inactive Ingredients: Vegetable glycerin, water, natural flavorings, fructose, and potassium sorbate
Will I get what I see in the picture?
- Rx B12 is a brand name. You will receive the exact product that you request.
Review Summary
18 total reviews
Rated 4.83 out of 5 stars
100% of respondents would recommend this to a friend
Ratings Distribution
15 5 star reviews
3 4 star reviews
0 3 star reviews
0 2 star reviews
0 1 star reviews
Reviews
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B12 Supplement
From UndisclosedComments about Rx B12 4oz Oral LiquidBest price for my cat's B12. Fast processing and safely shipped. Will buy again! -
Rex B12 (liquid)
From UndisclosedComments about Rx B12 4oz Oral LiquidLiquid makes it easier to give to a stubborn little dog.-
![Rex B12 (liquid)]()
"No, I'm NOT spoiled"
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Great health maintenance for rural clients
From UndisclosedComments about Rx B12 4oz Oral LiquidMy sweet Sadie's B 12 levels dip dangerously low, so this product helps us maintain healthy levels. Living rurally now, VetRxDirect to my PO Bx makes our life much simpler. Many Thanks.-
![Great health maintenance for rural clients]()
Happy Mountain Mama
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Great B12 Supplement
From UndisclosedComments about Rx B12 Forte, 2oz Oral LiquidLove this supplement! My vet recommended it for my dog, and we just ran out so I bought another. It lasts him months though and his B12 levels have been perfect since we started him on it. -
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Easy to Administer B Vitamins
From UndisclosedComments about Rx B12 4oz Oral LiquidWe are treating Jeffrey for FIP and this is a great vitamin for him-
![Easy to Administer B Vitamins]()
My handsome Jeffrey
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This medication helps my pet.
From Lake Murray, SCComments about Rx B12 4oz Oral LiquidMy pet was diagnosed with Colitis. I needed something to help boost his immune system. He seems to like the flavor, I have no problems giving it to him. I would definitely recommend this product.-
![This medication helps my pet.]()
This is Rudy, that takes the meds.
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Theses meds seem to have helped him
From UndisclosedComments about Rx B12 4oz Oral LiquidMy little boy has digestive issues. He wants nothing but treats, which is not exactly healthy or nutritious.-
![Theses meds seem to have helped him]()
Sweet boy Rudy
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Works great
From Long Beach, CaComments about Rx B12 Forte, 2oz Oral LiquidHis levels were even too high, so make sure you follow the directions carefully!-
![Works great]()
Hello Everyone! My name is Happy and I am 17 with CKD, a heart murmur, herpes, and one eye. I am the SWEETEST little boy and my Mommy worships me! -
![Works great]()
Happy's nieces -
![Works great]()
Happy's nieces and nephews -
![Works great]()
Happy and his sister Venti who passed away in April. Before he lost his eye.
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Good sruff
From UndisclosedComments about Rx B12 Forte, 2oz Oral LiquidWorks very well -
Great alternative to B12 shots
From UndisclosedComments about Rx B12I have a 13 year old maine coone named Buddy with anemia and possible gi lymphoma, it has helped his appetite and energy level. Buddy gets very upset at vet office and they wanted to give him shots, this is a great alternative
Displaying Reviews 1 - 10
Q & A
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Is this best given with or without food? How long before or after other medications can this be given? Does the bottle have to be shaken first?
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According to the manufacturer, Rx B12 is best given with food or around a meal. Like all vitamins, it requires food in the stomach to ensure proper absorption and utilization. It can be given concurrently with other medications as it will not contraindicate or interfere with the efficacy of any drug. It is a water soluble vitamin. The bottle does not require shaking.
Verified Answer
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How much do you give a cat that weighs 6 lbs.??
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According to the manufacturer, cats and small dogs under 25 lbs should receive 1 ml per day. Please consult with your veterinarian to determine if the manufacturer’s recommended directions are appropriate for your cat.
Verified Answer
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Does this contain fructose???
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Yes, according to the manufacturer the inactive ingredients are vegetable glycerin, water, fructose, natural flavorings, and potassium sorbate.
Verified Answer
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Does this product contain any chicken or chicken byproducts? My cat is allergic to poultry but needs a vitamin B supplement.?
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According to the manufacturer, the active ingredient in the RX B12 liquid is 250 micrograms of Vitamin B-12 (cyanocobalamin). The inactive ingredients are vegetable glycerin, water, fructose, natural flavorings, and potassium sorbate. The manufacturer states this product does not contain any chicken, chicken byproducts or chicken protein in the natural flavorings. The flavorings of the Rx B12 are hydrolyzed. Please consult your veterinarian regarding any further questions or concerns regarding this medication in your cat.
Verified Answer
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Can you tell me what is the absorption rate of cyanocobalamin from this product for dogs? I already purchased as my dog has chronic renal failure and the vet feels that he needs B12 but she wanted him to get shots. I found your product and she feels that it won't be as absorb as much vs giving him shots. I'm on a budget and was just wondering if it has the same absorption rate as prescription injections. Thanks! By the way, my dog likes the flavor!?
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Cyanocobalamin is better absorbed as an injection and may not have dependable absorption when given orally. Please defer to your veterinarian’s recommendation to ensure the best therapy for your dog.
Verified Answer
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How many MCG is this 1000??
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According to the product label there is 250 mcg of Vitamin B-12 (cyanocobalamin) per 1 ml. Please discuss any further questions or concerns regarding the use of this medication with your veterinarian.
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Is this safe for a cat with Chronic Renal Failure??
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Rx B12 may be given to animals with a deficiency due to illness or disease, or to replace missing nutrients from their daily diet. Consult with your veterinarian before using this product, to ensure it is safe for your cat with chronic renal failure and follow their guidelines for use.
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I need to add B12 liquid to the subcutaneous fluids I give my kidney dog. Will this work? Do I need a prescription??
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Rx B12 is an over the counter supplement that does not require a prescription. Rx B12 is recommended as an oral supplement to increase B12 levels. The manufacturer recommends to give 1 mL by mouth per day for cats and small dogs, 2 mL by mouth per day for medium sized dogs (25-50 lbs), and 3 mL by mouth per day for large sized dogs (50-100 lbs). Please consult with your veterinarian before administering Rx B12 to your dog and any questions or concerns you have regarding this medication.
Verified Answer
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my small 4lbs dog has a very bad anemia. Can i give her a B12 vitamin supplement that i take??
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Is this B12 supplement hypoallergenic??
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According to the manufacturer, Rx B12 has no reported adverse effects in animals. It is well tolerated. Please contact your veterinarian to determine if this product is appropriate for your cat or dog.
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Displaying Questions 1 - 10