This paper is developed with the objective of conducting a systematic review on the nursing assessment of patients with persistent pain treated with opioids that allows us to recognize which pain assessment scales are used to determine the pharmacological treatment of persistent pain with opioids, define the associated complications to the treatment of pain with opioids, in hospitalized patients and to identify the drugs of first choice for the treatment of pain with opioids. The methodology used was a systematic review of the literature, which began with a search strategy in which the inclusion and exclusion criteria, keywords and search engines were determined to obtain a total of 30 articles reviewed, most of which were published among in 2017 and 2019, which coincided in the variables of pain 70%, nursing 20%, opioids 57% and analgesics 30%. Among the conclusions, the following stand out: it is important not only to apply pain assessment scales to indicate the appropriate treatment, but there is also a need to carry out control through re-evaluations that allow determining the effectiveness of the applied treatment. Likewise, it is necessary for professionals to understand the fundamental role they play in the therapeutic approach to pain and the need to recognize not only the protocols but also the forms of use that each opioid requires.

Keywords : Pain, Analgesics, Opioids, Therapy, Rating Scale, Nursing