Q12H (or q12H) – an abbreviated term for timing medication doses.
q8H means every 8 hours.This is not the same as three times a day (tid or TD).
q12H means every 12 hours. This is not the same as twice-daily (bid or BD).
q24H means every 24 hours. This is not the same as once-daily (qd or QD).
severity – a measure of how bad something is.
clinical failure – when you develop new symptoms and illnesses even though you are on treatment. See virological failure.
open label – this means that a patient in a trial knows which treatment they are taking.
BMI (body mass index) – a calculation using height and weight that is used to decide whether someone is over or under weight.