YES, Zometa can cause some bone pain, but it should not be extreme and should not last more than 24 hours.
I have always been advised to get the Zometa on a very slow drip. The slower the drip the fewer side effects. It's my opinion and the opinion of my support group that Zometa taken in 15 minutes is too fast. Ask to set for 45 minutes to 60 mins and see if that helps. Also get really hydrated before you go in and even ask them to drip the remainder of your saline so it will help you hydrate.
Even at that I still have slight leg cramps, very slight, and slight left jaw cramp but they only last for 24 hours.
Drink tonic water with Quinine with your favorite juice - it will help rid you of cramps too, we don't know why but it works. Drink a big glass a day or maybe even two glasses especially the day of Zometa.
Zometa's job is to slow down the breakdown process of bone that everyone gets daily, even healthy people get bone breakdown. Just like we sluff off skin cells, we do the same with bone. Zometa slows this process.
Hope this helps.