My Dog Ate Vitamin D Tablets: What To Do

A chewed tube of psoriasis cream sounds like nothing. It is one of the more dangerous things a dog can find in a bathroom, and the damage can be permanent.

Some poisons announce themselves. This one does the opposite, and that is precisely what makes it dangerous.

A dog finds a tube of cream on a bedside table and chews it. There is a bit of mess, no obvious drama, and the dog carries on as normal. Nothing happens that evening. Nothing happens the next day either. By the time anything does happen, the kidneys have often taken damage that will not fully undo itself.

Vitamin D is not a vitamin in this context. It is a poison with a long fuse.

What to do

1. Ring your vet or a poison line now, without waiting to see whether your dog seems affected. It will not seem affected. That is the nature of it.
2. Take the product with you so the exact form and strength can be identified.

In the UK, the Animal PoisonLine. In the US, the Pet Poison Helpline or the ASPCA Animal Poison Control Center.

What it actually does

Vitamin D pushes the level of calcium in the blood upwards. Too much calcium, sustained, damages the kidneys and disturbs the rhythm of the heart.

Two features make it worse than it sounds. The effects can take several days to become apparent, so the early quiet is meaningless. And some of the resulting damage can be permanent, which is not true of most of the poisonings in this guide. A dog treated early usually does well. A dog treated once it is visibly ill may be left with lasting kidney disease.

That combination, slow to show and hard to reverse, is exactly why this is treated as urgent when nothing appears to be wrong.

The two places it comes from

Human vitamin D supplements. High-strength tablets and drops have become very common in medicine cabinets, and a chewed bottle can hold a lot.

Psoriasis creams and ointments. These contain vitamin D analogues, and they are the classic case. The tube looks utterly medicinal and boring, nothing like food, which is exactly why owners underestimate it. A dog chews it off a nightstand, the owner wipes up the cream and thinks little more about it.

If you or anyone in your household uses a psoriasis treatment, it is worth knowing this before it happens rather than after.

What you might see, eventually

• Vomiting and diarrhoea
• Blood coming from the gut
• Convulsions
• An irregular heartbeat
• Signs of kidney failure, including drinking and urinating far more than usual

Because so much of this arrives late, the absence of symptoms on day one tells you nothing useful. Do not let a normal-seeming evening talk you out of the phone call.

The one thing not to do

Do not try to make your dog sick unless a vet or a poison line specifically tells you to.

Bathrooms and bedside tables

Creams live on surfaces. That is the whole problem. A tube on a bathroom shelf, a bedside table or the edge of a bath is at perfect height for a curious dog, and in a hotel room those surfaces are unfamiliar and rarely checked.

The habit worth building is simple. Anything medicinal, including creams and ointments you would never think of as medicine, goes in a zipped bag or behind a door. Not on a surface, and not in an open wash bag on the floor.

Bring the tube or the bottle

Vitamin D comes in very different strengths, and psoriasis creams contain analogues that behave differently again.

The product tells your vet how much was potentially available and how worried to be, and the difference between a low-dose supplement and a high-strength cream is the difference between a phone call and a hospital stay.

The habit that prevents it

Creams live on surfaces because that is convenient, and surfaces are where dogs put their noses.

Anything medicinal goes in a drawer, a cupboard or a zipped bag: not on the bedside table, not on the edge of the bath, not in an open wash bag on a hotel floor. That single habit covers vitamin D creams, painkillers, hormone gels and most of the other human medicines that end up in dogs.

Sources

This article was written using guidance from RSPCA, the Royal Society for the Prevention of Cruelty to Animals, the UK's oldest animal welfare charity. This guidance is for general information and does not replace a consultation with your own veterinarian. In an emergency, always contact a vet. Read [how we write our health guidance](https://rochsociety.com/how-we-write-our-health-guidance/). Last reviewed July 2026.