Alimacoo

I'm a nursing student with one semester to go and recently a fellow student gave birth to a full-term baby with a deep vein thrombosis in his left arm. The NICU nurse whose care he was under accidentally administered medication meant to dislodge the clot TWICE (meaning she gave it to him on schedule, didn't note it properly and gave him a second dose half an hour later (dosing is supposed to be spaced 8 hours apart)). Later that day the clot dislodged and the doctor is saying that it was her mistake that actually caused the clot to dislodge, otherwise it may have been unlikely and/or taken much longer. I'm wondering what kind of situation this is job-wise when a nurse gives the wrong dose of medication. Is this typically a suspension thing or a firable offense? Does this happen infrequently? Could the hospital be held liable even though there was no damages?