[Clinical expirience in opioid switch for noncancer chronic pain treatment].
BACKGROUND: The implementation of opioid switch (OS) as a strategy in non-malignant chronic pain has been scarcely proved. This article aims to evaluate the results of OS in a Pain Treatment Unit.
METHODS: This is an observational retrospective study in which all patients who had been subjeted to OS for a period of 18 months were selected. All of them had been treated with opiods plus adyuvants for more than 6 months and had a visual analog scale (VAS) of at least 5, either with or without adverse effects.