Are the side effects of fluoride in normal doses anything at all?

No. Normal doses of Fluoride will have no side effects at all. Fluoride can be toxic only in very large doses such as if a small child were to consume a tube of toothpaste. But there are no side effects from regular use of Fluoride toothpaste and fluoridated water.
Fluoride. Fluoride is usually found naturally in low concentration in drinking water and foods. The concentration in seawater averages 1.3 parts per million (ppm). Fresh water supplies generally contain between 0.01–0.3 ppm, whereas the ocean contains between 1.2 and 1.5 ppm. In some locations, the fresh water contains dangerously high levels of fluoride, leading to serious health problems.