Product Short Description: LITHIUM LACTATE LR Product Description: Compound Sodium Lactate (Hartmann's) is used to replace body fluid and mineral salts that may be lost for a variety of medical reasons. It is especially suitable when the losses result in too much acid being present in the blood. Your doctor may have prescribed it for another reason. Compound Sodium Lactate (Hartmann's) is used to replace body fluid and mineral salts that may be lost for a variety of medical reasons. It is especially suitable when the losses result in too much acid being present in the blood. Your doctor may have prescribed it for another reason.