6:00 a.m., 12:00 noon, 6:00 p.m., 12:00 midnight
6:00 a.m., 10:00 a.m., 2:00 p.m., 6:00 p.m., 10:00 p.m., 2:00 a.m.
9:00 a.m., 1:00 p.m., 5:00 p.m.
Before the patient’s meals and at bedtime