Jonathan is 31 years old and presents to the GP with a 2 week history of fevers, increased urinary frequency, dysuria and perineal pain.
On examination his temperature is 37.8 °C and rest of observations and abdominal examination are unremarkable. Urine dipstick is positive for nitrites and leucocytes. Rectal examination reveals a tender, warm, swollen prostate and acute prostatitis is suspected.
What is the single most appropriate initial management option?