The goal of this pilot, randomized, single-blind, placebo-controlled trial is to evaluate the feasibility of and provide preliminary information for a multi-center randomized controlled trial that will assess the effects of metformin on blood sugar control in patients after total hip or total knee replacement surgery. The primary objective of this study is to assess the feasibility of conducting a large, randomized trial with regards to timely recruitment, study drug administration, protocol adherence, and overall retention in patients undergoing total joint arthroplasty. Secondarily, the investigators aim to obtain preliminary estimates of group-specific outcome means and variances for primary and secondary outcomes of a larger future trial.
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Rate of participant enrollment
Timeframe: 3 months
Rate of appropriate study drug administration
Timeframe: 3 months
Rate of participant adherence to trial intervention per protocol
Timeframe: 3 months
Rate of participant retention to 90-day follow up
Timeframe: 3 months