The terms “Alzheimer’s” and “dementia” are often used interchangeably in everyday conversation, but experts note that important distinctions exist. Dementia serves as an umbrella term for a range of conditions characterized by cognitive decline, while Alzheimer’s disease is the most common type of dementia under that umbrella. The remaining 30 to 40 percent of dementia cases consist of a wide variety of other conditions.
Understanding the Terminology: Dementia Versus Alzheimer’s Disease
Experts explain that presentations vary significantly from person to person. While episodic memory loss is usually the earliest and most prominent symptom of Alzheimer’s disease, other forms of dementia often present differently. In certain other types of dementia, early symptoms are more likely to include slower processing speeds, behavioral and personality changes, and spatial dysfunction rather than memory loss.
Recognizing Warning Signs and Seeking Evaluations
Distinguishing between normal aging and early warning signs can help individuals determine when to seek professional medical advice. Anticipated changes in memory and brain function can occur as people get older, but these changes should never be severe enough to impact a person’s ability to perform routine daily tasks.
Physicians advise that warning flags include trouble paying bills on time, forgetting to take medications, missing appointments, struggling to remember upcoming events on the calendar, or having difficulty interacting with friends and family. Often, memory loss is first noticed by others rather than the individual experiencing it.
Primary care doctors typically serve as the initial point of contact. A primary evaluation may begin with basic checks, such as monitoring blood pressure, evaluating blood sugar levels for individuals with diabetes, or ordering blood work to check for thyroid levels and vitamin deficiencies. If basic causes are ruled out, a primary care physician can order more specific tests or refer the patient to a specialist.
Advances and Considerations in Blood Testing
Blood biomarkers for Alzheimer’s have advanced rapidly in recent years and are now appearing in actual clinics rather than strictly remaining in research studies. However, experts caution that these tests are specifically aimed at individuals who already exhibit memory or thinking problems.
Most doctors do not recommend blood tests, PET scans, or spinal fluid tests for healthy people to learn their future risk. This is because the subsequent recommendations—such as managing blood pressure, exercising, and eating well—remain the same regardless of whether a test result comes back high-risk or low-risk.
Medication Availability and Risk Factors
Treatment options and medication availability differ substantially between Alzheimer’s and other forms of dementia. Because Alzheimer’s is the most common and most-researched type, the majority of FDA-approved medications target Alzheimer’s dementia. For other forms such as Lewy body, frontotemporal dementia, and Parkinson’s dementia, no specific FDA-approved medications exist, though patients diagnosed with other forms may still be prescribed drugs designed to treat Alzheimer’s disease.
In addition, certain medications taken for other health concerns may carry potential risks regarding cognitive function. The American Geriatrics Society’s Beers List identifies benzodiazepines, antihistamines, and tricyclic antidepressants as potentially inappropriate for older adults due to side effects such as confusion, clouded thinking, and memory lapses. Studies have indicated associations between cumulative doses of anticholinergic drugs and benzodiazepines and an increased risk of developing dementia or Alzheimer’s disease, noting that physiological changes in older adults affect how drugs are distributed and broken down in body tissues.
