My son is 40 years old, diagnosed with Downs Syndrome. In April...

My son is 40 years old, diagnosed with Downs Syndrome. In April 2007 he had a sore on his leg diagnosed as Cellulites. 15 days of Lavaquin 750 mg. was prescribed. Since taking this medication he has had a complete personality change. He appears to be hallucinating and is constantly talking to himself. He previously enjoyed TV and music. He now continues to watch TV but with the volume very low. He is no longer interested in music. He is more involved in talking to himself. We have taken him for every medical test available with no problem diagnosed. He has also been to an Neurologist, again with nothing unusual noted. He constantly is in the bathroom attempting to go to the bathroom. Yes, he has also had all the urology and gastro. tests, nothing noted. Very frustrating. Appears to be the result of the Lavaquin.