Rx D3
Starting At
$22.00
Rx D3
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Guaranteed lowest authorized price. Learn more.
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Guaranteed lowest authorized price. Learn more.
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Usually ships the same weekday before 3pm CT.
What are Rx D3 and Rx D3 Forte by Rx Vitamins for Dogs and Cats?
- Rx D3 is a nutritional supplement for dogs and cats that contains pure Vitamin D3 in the form of cholecalciferol.
- The cholecalciferol is blended with MCT oil and diluted sufficiently to enable safe usage in animals as small as 9 lbs.
- Rx D3 Forte is designed for dogs and cats with a greater deficiency or advanced dietary needs.
Why is Rx D3 given to cats and dogs?
- Vitamin D3 helps with calcium and phosphorus absorption in the body and helps support immune system health and function.
- Vitamin D3 is involved in the regulation of thousands of genes and helps prevent inflammatory diseases once it has been processed by the liver.
- Dogs and cats are unable to convert sunlight into Vitamin D and receive all their Vitamin D from food. Rx D3 supports the health of dogs and cats that are not getting enough Vitamin D in their diet.
What else should I know about Rx D3?
- There are about 1800 drops per bottle.
- Store at room temperature, out of direct sunlight.
What problems could my dog or cat have with Rx D3?
- Keep out of reach of children and animals.
- In case of accidental overdose, contact a health professional immediately.
- If animal's condition worsens or does not improve, stop product administration and consult your veterinarian.
How do you use Rx D3?
- Use as directed by your veterinarian.
- A vitamin D3 test using the VDI Laboratory test kit is recommended in order to establish a safe and effective dosage. Retesting in 8-10 weeks to ensure Vitamin D3 sufficiency is also recommended.
What is in Rx D3 and Rx D3 Forte?
Rx D3
- Active ingredients per 1 mL: 3000 IU of Vitamin D3 as cholecalfiferol.
- Active ingredients per 1 drop: 100 IU of Vitamin D3 as cholecalfiferol.
- Inactive ingredient: MCT Oil.
Rx D3 Forte
- Active ingredients per 1 mL: 15,000 IU of Vitamin D3 as cholecalfiferol.
- Active ingredients per 1 drop: 500 IU of Vitamin D3 as cholecalfiferol.
- Inactive ingredient: MCT Oil.
Will I get what I see in the picture?
- Rx D3 is a brand name. You will receive the exact brand that you request.
Is it important for my dog or cat to finish all of the Rx D3?
- Dogs and cats may use this product for different lengths of time. Please consult your veterinarian if you have any questions.
Who makes Rx D3?
- Rx D3 is made by the manufacturer Rx Vitamins.
Review Summary
42 total reviews
Rated 4.98 out of 5 stars
100% of respondents would recommend this to a friend
Ratings Distribution
41 5 star reviews
1 4 star reviews
0 3 star reviews
0 2 star reviews
0 1 star reviews
Reviews
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This had helped my pets
From UndisclosedComments about Rx D3 Forte, 2ozBoth my dogs Thor and Athena have been moving around a lot easier than before and a little more active.-
![This had helped my pets]()
Thor & Athena
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Keeping our little girl healthy after surgery
From UndisclosedComments about Rx D3 2ozOur vet recommended this for our little girl after her surgery, and she's been going strong for nearly 5 years now on this.-
![Keeping our little girl healthy after surgery]()
Missy
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Vitamin D3Forte
From Plymouth, MiComments about Rx D3 Forte, 2ozIt was recommended by our canine oncologist because lack of Vitamin D3 has been associated with mast cell tumors. -
Lack of Vitamin D3 Possibly Linked to Cancer
From UndisclosedComments about Rx D3 Forte, 2ozOur oncologist recommended it for our two littermates who both had mast cell cancer surgeries. So far, so good -
Great Service!
From UndisclosedComments about Rx D3 2ozVeterinarian suggested. Great service and quick shipping! -
Thanks for helping me keep my babies healthy!
From UndisclosedComments about Rx D3 2ozMy dog was recently recently diagnosed with MMVD. It's so important to make sure that she's getting the right amount of vitamins and minerals in her diet. This company is great. They have all the items that we need excellent prices and they ship fast! -
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Rx D3
From UndisclosedComments about Rx D3 2ozVitamin D was recommended by my vet as Indy had low levels of vitamin D. The vet specifically recommended Rx D3 by Rx Vitamins.-
![Rx D3]()
Indy
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Vitamins
From UndisclosedComments about Rx D3 2ozThelma is in a 5 month remission from B cell lymphoma. She received 6 months of CHOP chemotherapy, completed in December 2023. Her Vitamin D and B levels are low, she is also having renal issues and hair loss. Using your vitamins in hopes of raising her levels.-
![Vitamins]()
Thelma Lou
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Great product… has help Sam a lot
From UndisclosedComments about Rx D3 2ozVet recommended for better health as my boy was lacking proper amount of Vitamin D from gastro illness.-
![Great product… has help Sam a lot]()
Sam just hanging out
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We're working on getting this older girl healthy again.
From UndisclosedComments about Rx D3 Forte, 2ozOur dog Dolores tested low for vitamin D so we're supplementing as advised by our vet.-
![We're working on getting this older girl healthy again.]()
An acupuncture day -
![We're working on getting this older girl healthy again.]()
A lazy day in Indiana -
![We're working on getting this older girl healthy again.]()
Dolores and her squeaky bear
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Displaying Reviews 1 - 10
Q & A
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Is the vitamin D supplement tasteless?
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According to the ingredients list on the product labeling, Rx D3 and Rx D3 Forte do not contain any flavoring.
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How long is the product good for? Do you go by the expiry date on the bottle or from the time of opening??
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The manufacturer of Rx-D3 goes by the expiration date listed on the bottom of the bottle regardless of opening date. If you have specific concerns about a particular product before you order, you may contact the pharmacy via email at [email protected].
Verified Answer
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After testing, the lab recommended 2000 IU/day (0.75 on the dropper) for my dog, however the measurement on the dropper of 0.75 contains 30 drops which would be 3000 IU/day. Stick with the 20 drops to be sure??
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The Rx D3 contains 100 IU per drop. To achieve a dose of 2000 IU/day, 20 drops of the Rx D3 would have to be given. The Rx D3 Forte contains 500 IU per drop. The number of drops of the Rx D3 Forte formulation would be 4 drops to reach 2000 IU/day. Your veterinarian may be able to assist with more specific instructions.
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The difference between the RX d3 and RX D3 forte??
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The difference between these products is the amount of vitamin D. RX D3 contains 100 IU of vitamin D3 per drop, whereas RX D3 Forte contains 500 IU of vitamin D3 per drop.
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How soon can my dog eat after taking her daily drops of D3 Forte?
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Rx D3 can either be administered by mouth or mixed into your dog’s food. It is important to give this with a meal, not on an empty stomach for proper absorption. To ensure your dog receives the appropriate dose, you may consider mixing the dose in with a small amount of food prior to the main meal. Please consult your veterinarian with any further questions or concerns regarding the use of these medications for your dog.
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I have had this in the refrigerator. Does this change the potency or effectiveness??
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According to the manufacturer, refrigeration will not adversely affect the potency or efficacy of the formula; however, do not allow RxD3 to freeze.
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Does this get refrigerated??
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According to the manufacturer’s product label, Rx D3 and Rx D3 Forte should be stored at room temperature out of direct sunlight.
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I understand there are 500 IU per drop but how many drops are in a mL??
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According to the product label, Rx D3 Forte contains 15,000 IU of Vitamin D3 per 1 ml and 500 IU per drop. Using the included dropper that is provided from the manufacturer, 1 ml would contain 30 drops.
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what is the dosage for this med? How long does it last??
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RX D3 is contains 100 IU (International Units) of Vitamin D3 per drop. Please consult with your veterinarian for proper testing before using this product and for questions in regards to dosing.
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Displaying Questions 1 - 9