FLOTRAL doesn't result in fatty liver
Side effects of FLOTRAL are genearally postural hypotension
If you have got your repeat ultrasound
done within few weeks then it is unlikely for fatty liver to have developed in such a short span of time.
Most likely liver might not have been looked into in your earlier ipultrasound because everybody was concerned about prostate only.
Slight fatty liver is very common and may not be there due to particular cause but a moderate fatty liver can be caused by various causes like alcohol,obesity,high cholesterol
,diabetes,high triglycerides,arouse types of hepatitis
Talk to your doctor regarding fatty liver if it is not mild.