A review of various human clinical and epidemiological studies determined that certain medications commonly used by elderly individuals are related to lower vitamin D levels.
Drug-nutrient interactions are the interactions between a food, a nutrient, or nutrition status and a pharmaceutical drug. They are considered to be side effects. For example, deficiencies in calcium, magnesium, or zinc may impair drug metabolism, and certain diuretics and corticosteroids deplete the body of vitamin K.
While polypharmacy, or the use multiple medications by a patient, is very common among elderly individuals who have multiple conditions such as high blood pressure and diabetes, it is associated with decreased quality of life and decreased mobility and cognition.