What rovigon tablets used for?
If by tablets you mean pills (and not the stone tablets upon which were inscribed the Ten Commandments) there are a very wide range of different substances which are available in the form of tablets, and consequently, tablets can do a very wide range of things. If you are suffering from scurvy, a vitamin C tablet will cure you.
It depends what kind of tablets they are and whether they have to be taken before or after a meal, or during for that matter. For a majority of tablets, they have to be taken after having something to eat; check the label or instructions on the side of the bottle/container and it should specify when would be preferable to take the tablets. It would be easier if you specified which tablets