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BMJ 2003;327:1179-1181 (22 November), doi:10.1136/bmj.327.7425.1179
Criteria used for screening tests should apply to monitoring
| The first 150 words of the full text of this article appear below. |
We all want our treatments to work, and none of us wishes treatment to cause harm. Monitoring drug treatment is one way of seeing that a treatment works, while protecting the patient from adverse drug effects. For many patients and many treatments clinical evaluation is sufficient. An example is measuring the blood pressure in a patient on antihypertensive treatment. When therapeutic goals cannot always be directly observed, monitoring may require blood tests in order to know whether they have been reached. An obvious example is the measurement of the international normalised ratio (INR) in patients treated with warfarin. As well as ensuring that the therapeutic goal, the prevention of thrombosis, is likely to be met,1 measuring the INR helps to avoid the risk of haemorrhage, which rises steeply as the INR increases above 2.0.2
Monitoring treatment to anticipate or detect adverse reactions to drugs before they become inevitable or irreversible
Munir Pirmohamed, professor of clinical pharmacology
Department of Pharmacology and Therapeutics, University of Liverpool, Liverpool L69 3GE (munirp@liv.ac.uk)
Robin E Ferner, clinical pharmacologist
West Midlands Centre for Adverse Drug Reaction Reporting, City Hospital, Birmingham B18 7QH (R.E.Ferner@bham.ac.uk)
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