For the most part since you will be slicing into new growth. In most cases, a plant can only be killed by extremely excessive trimming. It's possible that your plant won't bloom again for a year or two, or that it will have an unnatural appearance. Still, you shouldn't let that stop you from giving pruning a shot. The plant can be made more open and aesthetically pleasing by doing this type of pruning, which involves removing any and all crossing branches and shaping the remaining ones.