MSFinals-5283

A 29-year-old man is admitted to a psychiatry ward from the emergency department. He was brought by a concerned family member who was worried by his recent behaviour. He had been engaging in large amounts of shopping, spending nearly every night at the mall and hardly sleeping. When asked if he understands the risks of overspending, he is convinced that nothing can go wrong. He struggles to focus on the topic and begins rambling about buying various different items that are sure to make him happy. A diagnosis of a manic episode is made and he is stabilised on treatment with quetiapine. Subsequently it is decided to initiate lithium to maintain his mood.
When should his serum lithium levels next be monitored?