What happens when you swallow toothpaste?

It depends, read the label to make sure. But usually, it should not affect you unless it is consumed in large amounts.

It always depends for each toothpaste brand usually.
BUT, generally all toothpastes are toxic for your body is you do consume it.
If you swallow a small amount while brushing, you shouldn't worry too much, I would maybe suggest drinking a lot of water to dilute it.
If you swallow a large amount (about a teaspoon or less,) you should contact the poison control center or call a hospital just to be safe.
Health affects also depend on a persons age, and the strength of their immune system.

What are the options?