Tranexamic acid (TXA) toxicity in vitro. 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide (MTT) assay of: a) to c) tenocyte (n = 11); d) to f) fibroblast-like synoviocyte (FLS; n = 5); and g) to i) chondrocyte (n = 5) viability at: a), d), g) one; b), e), h) four; and c), f), i) 24 hours. Values were measured as luminescence and expressed as percentage change from untreated (control) wells. *p < 0.05; †p < 0.01; ‡p < 0.001. Data are means ± standard error of the mean; one-way analysis of variance; Dunnett’s Multiple Comparison Test.