What is a common side effect of Lithium therapy?

Lithium therapy is commonly used in the treatment of bipolar disorder and is known for its various side effects. Choosing "all of the above" as the answer reflects the reality that each of the listed side effects can occur in patients undergoing lithium treatment.

Dry mouth is a frequent side effect, which may be attributed to lithium’s effect on the salivary glands and hydration levels in the body. Weight gain is another significant concern, as many patients on lithium experience changes in appetite and metabolism that can lead to increased weight. Hair loss is less commonly discussed but can occur as well, potentially linked to changes in hormonal balance or metabolism while on the medication.

Thus, the correct answer captures the comprehensive nature of side effects associated with lithium therapy, acknowledging that it can lead to a combination of these adverse reactions in different individuals.