Effect of Colchicine in the Perioperative Period on Reducing Post-Operative Pain in Total Knee Arthroplasty

This study is a prospective, randomized, double-blinded, placebo-controlled study of the drug colchicine in the acute postoperative period for patients who are undergoing a total knee arthroplasty (TKA). Patients aged 18 years or older who are undergoing TKA will be invited to participate in the study. The primary endpoint of this study is to determine if colchicine, an anti-inflammatory medication commonly used for gout attacks, will decrease the postoperative pain of patients undergoing TKA.

In doing so, we will utilize a 3-arm approach with two experimental groups and one placebo group. Qualifying subjects will be randomized 1:1:1 to Group A receiving a 1.8 mg loading dose of colchicine, Group B receiving the same loading dose + 0.6 mg maintenance dose of colchicine to be taken twice daily, and Group C receiving a placebo.

Regarding study procedures, standard preoperative and intraoperative procedures will be employed to ensure experimental and control groups have a nearly equivalent experience before the intervention. Subjects will be discharged with the same ambulation instructions and physical therapy regimens. Aside from the experimental drug, patients will receive the same postoperative pain medications upon discharge.

Research staff in the Geisinger pharmacy will receive and prepare the oral medication for dispensing, which will include randomizing identification numbers to colchicine or placebo, labeling packages with study identification numbers and subject information, and ensuring there is no visible method to discern colchicine from placebo. Colchicine is to be stored at room temperature.

Providers and subjects will be blinded regarding whether the subject will receive a colchicine loading dose + the placebo pills for maintenance doses, a colchicine loading dose + colchicine for maintenance doses, or the placebo pills for both. Group A will receive a 1.8 mg loading dose of colchicine by mouth on postoperative day 0 and will be instructed to take a placebo by mouth twice daily on postoperative days 1-3. Group B will receive a 1.8 mg loading dose of colchicine by mouth on postoperative 0 and will be instructed to take a 0.6 mg maintenance dose of colchicine by mouth twice daily on postoperative days 1-3. Group C will receive placebo dextrose pills by mouth on postoperative day 0 and will be instructed to take the placebo by mouth twice daily on postoperative days 1-3. Subjects will be sent home with an adequate supply of pills for postoperative days 1-3 and instructions on use.