In order to help ensure safe treatment with lithium, dangers associated with the use of this drug should be discussed with your healthcare provider before treatment begins. If you have kidney disease, heart disease, dehydration, or low sodium levels in your blood, you may be at high risk for lithium toxicity. If you have these problems, your healthcare provider may choose to recommend an alternative to lithium.
Side effects that may be signs of mild to moderate lithium toxicity include increased or frequent urination, vomiting, muscle weakness, and coordination problems. Signs of more severe toxicity may include blurred vision, severe shakiness, and seizures.