Does it interfere with, or increase, the action of magnesium? Calcium leaches out magnesium. What I can say that using Tums or Rolaids for calcium, if that's what it's about, is not a good source, since you're mainly suppressing stomach acid, which shouldn't be done for very long. If it's calcium you need for this, a better form of it should be found. But nerves more often involve magnesium, which is in balance with calcium, so that might be an angle to pursue.