I was given terbinafine for toe nail fungal infection in Sept 2008. During the first two weeks I felt malaise, dizziness and fatigue and when I went for a walk my legs were wobbly. I changed to a lacquer after four weeks, but now, I sept 2009, I still feel weak and fatigued and this is very distressing. Can this be ascribed to the terbinafine and how could I prove it?