(HealthDay News) -- Dry mouth used to be considered a normal symptom of aging.

However, it's now clear that dry mouth is often a side effect of certain medications -- such as antihistamines, heart drugs and pain killers -- according to the Maryland Department of Health and Mental Hygiene. A decrease in hormones in postmenopausal women can also lead to dry mouth.

A lack of saliva causes food and bacteria to remain in the mouth for longer periods, which can lead to more plaque and cavities.

While there is no cure for dry mouth, you can get relief by drinking water, using saliva substitutes, using a humidifier or nasal spray, and by avoiding caffeine, alcohol and tobacco products.