Verantwoording en kosteneffectiviet van therapeutic drug monitoring (1): Betere behandeling voor minder geld

There are a number of effective but highly toxic drugs that exhibit a narrow therapeutic index and marked intersubject pharmacokinetic variability. Optimal therapy with such drugs requires therapeutic drug monitoring (TDM) in order to safely obtain the desired clinical effects. A systematic review was carried out to document the cost-effectiveness of TDM. The Cochrane database and Medline were searched. Reference lists of articles found were searched manually for relevant articles. Very few studies are performed that document the cost-effectiveness of TDM. Only for aminoglycosides it has been demonstrated that TDM is cost-effective. For the other classes of TDM drugs, its rationale has been made plausible, but cost-effectiveness has not been investigated. Since the use of many of these drugs would contain risks of underdosing or overdosing without TDM, emphasis should not be placed on its cost-effectiveness, but rather on how to use it in the most cost-effective and clinically effective manner possible.