Tramadol has a half-life of 6 hours. If a patient takes 50 mg at 21:00, what will the blood level be at 09:00 the next morning? Name 3 antidepressants that can be prescribed for pain-related conditions (eg fibromyalgia, neuropathic pain, or chronic musculoskeletal pain). Include complete medication orders, MOA and common side effects for each of the 3 medications.