Dementia can be diagnosed only if a doctor is made aware of the problem. Diagnosis will start with a thorough physical and mental exam, as well as the gathering of a detailed medical history. The family should be prepared to tell the doctor the range of the person's symptoms over time. The doctor will want to know how the symptoms progressed and whether they have improved or become worse. Also, the family should report how suddenly or gradually symptoms appeared.
A complete list of all medicines the person is taking will be needed. This includes over-the-counter products, herbal remedies, and prescription medicines. Combinations of drugs may impair thinking at times.
To determine if other medical conditions may contribute to the symptoms, the doctor may order certain tests, such as:
Since there is no definitive test for dementia in a living person, the doctor will try to rule out other conditions or diseases that may cause the symptoms.