Do you know whether your rabbit has worms or not? Most people only deworm if their rabbit tests positive. The dewormer used depends on the type of worms the rabbit has.
I use the general de wormer every 3 mths. Mine is a syrup called lil friends worm syrup. I read the instructions on the bottle and yeah. If my rabbits have other types of worms I ring the vet and ask what the best thing to use is