Subcutaneous Extended-release Buprenorphine Depot Misdiagnosed as an Abscess Resulting in Incision and Drainage and Disruption of Opioid Use Disorder Treatment.

Monthly extended-release buprenorphine subcutaneous injection (BUP-XR) is a newer treatment formulation for use in moderate to severe opioid use disorder. After injection into the subcutaneous tissue of the abdomen, the medication forms a depot to allow for slow release of buprenorphine. As such, a small yet visible and palpable nodule is normal and is expected to decrease in size over the following weeks to months. Given the newness of this medication, it is possible that not all healthcare providers are familiar with this formulation, nor will they interpret the BUP-XR depot as normal findings. Herein, we provide a case report where a patient's BUP-XR depot was misdiagnosed as an abscess, resulting in incision and drainage and disruption of life-saving opioid use disorder treatment. To prevent cases like this in the future, it is important that providers administering BUP-XR properly educate patients on what to expect during treatment with BUP-XR and when to seek care for potential abnormalities. In addition, it is critical that healthcare providers working in other treatment settings are aware of how to properly evaluate BUP-XR injection sites.