"The IV for ABSSSI was a drip solution wasn’t it? I was thinking of the possibility of an intravenous (IV) injection, which would be quicker."
An intravenous (IV) injection aka infusion is what you are referring to as a drip solution. An injection is a one shot deal that doesn't happen over a period of time and it doesn't have to be intravenous.
B-ABSSSI was administered by an intravenous infusion.