If your new to forums we have a great 'Greenlighter's Guide' that you can find here. You can inject ativan and I believe it comes in an IV form as well as the tablets made for oral use.
The problem with the pills is they have a lot of binders and other chemicals that you really don't want to inject. Does the oral or sublingual (under your tongue) route not work ?
Oral BA is already very high and IVing doesn't cause any extra rush or anything.. Its just instant action.. But benzos hit pretty quick anyway especially sublingual so yea imo not at all worth it.