RTK.NET Mail 136928 Mar 29 18:39:51 1996 Barb, Dizziness or balance troubles can be caused by many things besides PD. Stroke, a tumor, or a neurological disorder are possible causes, but there are also some more benign possibilities such as an inner ear infection which can sometimes be helped by antibiotics, decongestants, or drugs like antivert. Some people in my family have very sensitive inner ears and get vertigo with colds, sinus infections, allergies, etc. It is important that he see a doctor to look for some of the serious possibilities but also to see if it's a conditions that could be helped by fairly benign medication. Dizziness and/or balance trouble can lead to falls, some of which could be serious. It's important to try and treat the condition and learn what cautions to take while he is having this trouble. You mentioned that he had trouble while walking, but not while sitting. Does he have trouble all the time he is walking, or is it mainly a problem he gets just after he stands up? If it's the latter, it could be orthostatic hypotension, a blood pressure drop when you change position that causes dizziness. Hope you can discover the problem and a solution or adaptation soon, Sherri [log in to unmask]