Regular worming isn't commonly recommended for rabbits. Worms aren't usually as big of a problem for them, like they are for some other animals, though they can still happen. Plus for treating parasites, different ones require different medications to treat them. If it is a concern, you could have a fecal test done instead, and that will cover many of the internal parasites that rabbits get. The best thing is to be very familiar with the signs and symptoms of the various parasites, and be observant about your rabbits normal health and behavior, then if there are any signs or changes, to get your rabbit checked by your vet right away.
The problem encountered with regular worming, especially if always using the same wormer, is that these parasites can develop a resistance to the wormer, and since there are a limited amount of antiparasitics available, this can lead to problems in the future. This type of problem is being encountered in animals that are on regular worming, like horses.