Epidural Abscess in Chronic Pain Patient

A 55-year-old woman is admitted from the emergency department for management of severe low back pain. She has a history of chronic back pain and had an epidural steroid injection one week ago which has not improved her symptoms. She weighs 87 kg, BMI 31 kg/m2. Current medications: empagliflozin 10 mg daily buprenorphine patch 15 mcg/hr transdermally fluoxetine 20 mg daily gabapentin 300 mg twice daily metformin 1 g twice daily paracetamol 500mg + codeine phosphate 30 mg, 1-2 tabs 4-hourly PRN perindopril 10 mg daily