The present invention provides stable pharmaceutical antibody formulations, including lyophilized formulations, comprising an anti-IL-4/anti-IL-13 bispecific antibody and a buffering system, wherein the pH of the formulation is about pH 7, and wherein the formulation has a low salt concentration in order to reduce the ionic strength of the formulation. The formulations may, optionally, further comprise a non-ionic surfactant, a sugar, and/or a non-ionic stabilizing agent. The formulations can be used in the treatment of various diseases.