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q_h (AS ON A PRESCRIPTION)
From the Latin word 'quaque (once) and 'h' for number of hours. So, for example, if a medicine is to be taken every 6 hours, it is written 'q_h 6'.
qd (AS ON A PRESCRIPTION)
Qd (sometimes written QD or q.d.) means one a day (from the Latin quaque die).
Quality of life
An increasingly important consideration in medicine. The goals of treatment are to reduce symptoms and improve quality of life.
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