[mechman]

And this from CIL:

Q: Can I use exterior paint inside?

A: We do not recommend that you use an exterior labeled paint for interior use. Exterior paints are designed for specific use on exterior surfaces, hence performance and film integrity may be compromised if used on interior surfaces. Additionally, exterior paints typically have included in their formulation mildewcides, to resist the growth of mildew on the dry paint film, and the level of mildewcide in the exterior paint may be above the level recommended for interior use.

From Lowe's:

When painting indoors, use paint marked as "Interior" or "Interior/Exterior." Exterior paint is not for indoor use. Plus it doesn't dry as quickly and has a stronger odor — an important factor inside the house.

From House Painting Info:

Paints that are dedicated for exterior use have concentrated mildewcides and fungicides that could have heath risks if used indoors. Plus, exterior paints have more VOC’s, which means the paint will have a potent smell when compared to its interior counterparts.

Exterior paints, especially acrylics, are designed to fast dry and resist the worst that the environment can offer. Because of this, exterior paints won’t easily flow out smoothly on a surface and will more difficult to use. Many quality interior paints have the same great attributes as exterior paints without the health risks or problems of exterior paints.

I hope this helps keep people safe!

mech