5 doctors weighed in:

How much toothpaste has to be swallowed to cause a toothpaste overdose?

5 doctors weighed in
Dr. Arnold Malerman
Dentistry - Orthodontics
1 doctor agrees

In brief: Probably

Probably about a bathtub full at one time.
The one exception is fluoride containing toothpastes. Fluoride is a wonderful public health measure that dramatically reduces incidence of cavities, but must be used in measured dose. For example, children under age three should only use s small smear of toothpaste on their brush, over age three a pea-sized portion. Overuse can cause tooth mottling.

In brief: Probably

Probably about a bathtub full at one time.
The one exception is fluoride containing toothpastes. Fluoride is a wonderful public health measure that dramatically reduces incidence of cavities, but must be used in measured dose. For example, children under age three should only use s small smear of toothpaste on their brush, over age three a pea-sized portion. Overuse can cause tooth mottling.
Dr. Arnold Malerman
Dr. Arnold Malerman
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Dr. Daniel Kmak
Dentistry - Cosmetic

In brief: Alot

Alot.

In brief: Alot

Alot.
Dr. Daniel Kmak
Dr. Daniel Kmak
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Dr. Joy Poskozim
Dentistry

In brief: Child < adult

For an adult, a family size full tube of Fluoride toothpaste, since Fluoride can cause tummy upset (vomiting/diarrhea).
Non-fluoride toothpaste will not cause as much of a problem. For children, about half a tube of Fluoride toothpaste at one time. Once again, tummy upset/pain. At that point, calling the pediatrician is the best advice.

In brief: Child < adult

For an adult, a family size full tube of Fluoride toothpaste, since Fluoride can cause tummy upset (vomiting/diarrhea).
Non-fluoride toothpaste will not cause as much of a problem. For children, about half a tube of Fluoride toothpaste at one time. Once again, tummy upset/pain. At that point, calling the pediatrician is the best advice.
Dr. Joy Poskozim
Dr. Joy Poskozim
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Dr. Pavel Conovalciuc
Family Medicine

In brief: Depends

It depends on toothpaste Fluoride concentration.
To prevent it, children must be supervised until healthy toothbrushing habits have developed.

In brief: Depends

It depends on toothpaste Fluoride concentration.
To prevent it, children must be supervised until healthy toothbrushing habits have developed.
Dr. Pavel Conovalciuc
Dr. Pavel Conovalciuc
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