“…2,4,5 However, others have postulated that altered oxygen supply to the liver may not be the only mechanism, and that the increase in enzyme activity may be mediated by allergic reactions in the lung. 6 A few studies have reported abnormal liver function tests associated with long-term xanthine therapy, 7 long-term systemic corticosteroid use, 8 and with experimental treatment with zileuton, an inhibitor of the enzymatic pathway leading to leukotriene formation.…”