Objectives:

The objective of this study was to evaluate the perception of oncologists on adherence to opioid treatment for breakthrough cancer pain (BTcP) in current clinical practice. Our study also included an assessment of other aspects of the management of BTcP, such as the reasons for non-adherence, the adequacy of the treatment, or the possible interventions required to improve adherence.

Methods:

This observational, multicentric study was carried out in 84 hospitals throughout Spain. Oncologists were surveyed by means of an online questionnaire on their management of background cancer pain and BTcP, and their perception of adherence to the treatments.

Results:

Oncologists (N = 97) reported that their first choice for BTcP was fentanyl (various formulations), with high perceived tolerance (> 76 % of patients). Most oncologists (96.8 %) evaluated adherence in their patients but only 69. 1% always prescribed medication to prevent adverse effects of opioids and only 74.2 % always titrated the minimum dose. Most oncologists (51.0 %) perceived that 25-50 % of the patients did not adhere to the treatment for BTcP. Adherence to background pain treatments was high, although many oncologists considered that patients usually stopped taking the medication when feeling better. The main reported reasons for non-adherence were the self-perceived feeling that treatment was unnecessary, perceived inefficacy of the treatment, concerns about potential adverse effects, and lack of family support.

Conclusions:

Oncologists perceived that adherenceto BTcP treatment can be improved and recommended treatment of adverse effects, better education about pain management to patients and relatives, written prescription instructions, and simplification of drug regimens.

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