When Barba asks to recall the victim to testify again, the judge adjourns the trial for the day and says the witness will testify "first thing tomorrow," yet it is Friday when she says this. New York courts don't operate on Saturdays, so she should have said "first thing Monday" or "first thing next week."
Taking high doses of lithium would not cause any euphoria (AKA being high), in fact it causes quite the opposite. Large doses of lithium will cause the user to feel extremely sick, symptoms would include nausea, vomiting, muscle weakness, diarrhea and seizures. If the dose is large enough it will also cause severe neurological and renal damage and even death.