Cerebral insufficiency: memory deficit, depression, attention and memory loss that occur with Alzheimer's disease and multi-infarct dementia. Vertigo and tinnitus (ringing in the ear) of vascular and involutional origin. Peripheral vascular disease: Improvement of pain-free walking distance in Peripheral Arterial Occlusive Disease in Stage II according to Fontaine (intermittent claudication) in a regimen of physical therapeutic measures, in particular walking exercise.