Final answer:
Valproic acid (Depakote) is an alternative medication that can be prescribed for mood stabilization in bipolar disorders.
Step-by-step explanation:
When a client diagnosed with bipolar I disorder refuses to take lithium carbonate due to feeling sick, an alternative medication that can be prescribed for mood stabilization is Valproic acid (Depakote). Valproic acid is a mood stabilizer that is commonly used in the treatment of bipolar disorders. It is effective in managing manic episodes and preventing relapse.