Fluoroquinolone Mediated Tendinopathy and Tendon Rupture Leucovorin (also called folinic acid) is a folate analog and chemoprotective agent. It's used to rescue healthy cells from the toxic effects of high dose methotrexate, to enhance the effectiveness of fluorouracil (5 FU) PDF) Replenishing glutathione counters ciprofloxacin induced acute liver failure via possible gene modifying mechanism Toxicity of Glutathione Binding Metals: A Review of Targets and Mechanisms Frontiers Increased expression of glutathione peroxidase 3 prevents tendinopathy by suppressing oxidative stress