<prompt> All of the following may precipitate digitalis toxicity except :HypocalcemiaHypokalemiaHypomagnecemiaHypothyroidism  <response>: Answer is A Hypocalcemia Calcium synergizes with digitalis and precipitates its toxicity. Thus digitalis toxicity is associated with hypercalcemia and not hypocalcemia Also Remember: Digitalis does not cause Hypokalemia Q but Hypokalemia enhances digitalis toxicity e - Digitalis toxicity causes Hyperkalemia e-Harrison - Hypokalemia enhances digitalis toxicity by increasing its binding to NaK ATPase Q Both Hypehyroidism and Hypothyroidism enhance digitalis toxicity - Thyrotoxicosis : patients are more prone to develop digitalis arrhythmia. Q - Myxoedema : enhances responsiveness. These patients eliminate digoxin more slowly. e - Magnesium depletion hypomagnesimia may reduce tolerance to digitalis Q 