Epididymal cyst are not a serious problem, but antibiotic is not the treatment, the correct treatment is to undergo surgery to remove that cyst if the pain is severe enough or causing lot of discomfort only then surgery is done, otherwise there is no need to worry, they either gradually subside by themselves with time or remain there without causing in problem.
Next Steps
If the size of the cysts is increasing or if the pain is so troublesome, kindly consult a good general surgeon or a urologist and get the cysts removed.