Is a tablet good to be powdered for eating?

Depends. Some tablets are time release, and crushing it causes the whole medication to be delivered at once. This can be very dangerous. Also, some tablets have a coating that doesn't allow them to dissolve till they are past the stomach. Crushing these can lead to a bad stomach irritation.

I suggest you just swallow them whole. The company that made them probably knows more about what they are doing than we do.

Thanks for the answer!
Really interesting how tablets work...