The Decline of use of Paroxetine in England
Parox Hist14.doc GA19/05/04
3
IMR uses the common medication unit called TWS, (Two Weeks Supply), this enables the
medication to be accumulated under one universal label regardless of form or concentration.
Chart 2 was plotted using annual data, rather than quarterly data. It shows that the annual
consumption of paroxetine in all its forms grew by more than 1.15 million units per year for 7
years up to 2001, then it fell by 2.7 M units i.e. 25% from 2001 to 2003. In fact this decline is
much worse if the higher precision quarterly data is used; from the peak at Q4 2001 to Q4
2003 the fall was 36%. Annual totals can disguise higher rates of change defined by the
quarters within the years (frequently exploited in financial marketing.)
Parox Hist14.doc GA19/05/04
3
IMR uses the common medication unit called TWS, (Two Weeks Supply), this enables the
medication to be accumulated under one universal label regardless of form or concentration.
Chart 2 was plotted using annual data, rather than quarterly data. It shows that the annual
consumption of paroxetine in all its forms grew by more than 1.15 million units per year for 7
years up to 2001, then it fell by 2.7 M units i.e. 25% from 2001 to 2003. In fact this decline is
much worse if the higher precision quarterly data is used; from the peak at Q4 2001 to Q4
2003 the fall was 36%. Annual totals can disguise higher rates of change defined by the
quarters within the years (frequently exploited in financial marketing.)
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