Lithium is used to treat bipolar disorder, however, taking it can cause high levels of calcium in the bloodstream which may or may not be accompanied by an increased level of parathormone, also known as hyperparathyroidism.
Health Canada is now working with companies to update the product labels for the drugs. If you're on lithium, the federal department says do not stop treatment unless you've talked over the benefits and the risks of your treatment with your doctor.
Seven medications containing lithium are available in Canada.
