Final answer:
Metformin is the antidiabetic agent associated with lactic acidosis.
Step-by-step explanation:
The antidiabetic agent that is associated with lactic acidosis is Metformin. Lactic acidosis is a rare but serious side effect of Metformin. It occurs when there is too much lactic acid in the body, which can be caused by certain medical conditions, such as kidney or liver problems, or by taking high doses of Metformin.