New research has linked commonly used medications, including some that are sold over the counter, to dementia in older people.
Researchers looked only at older people and found that the higher risk occurred only when people took the drugs every day for three years or more.
The over-the-counter medications included some antihistamines used to treat hay fever and allergies (such as Benadryl) and sleeping products. Prescription medications included an older class of antidepressants and medications for urinary incontinence.
The study was published in the journal JAMA Internal Medicine. All drugs cited have an "anticholinergic" effect, meaning they block a certain neurotransmitter in the nervous system.
Experts say people should not stop taking their medications without talking to a doctor.
Wine, beer have their benefits
Experts are again saying that some drinking in moderation can have health benefits.
Studies have shown that drinking a glass of wine can have heart benefits. And experts say beer is high in antioxidants, which may help prevent age-related eye diseases.
A Harvard study found that middle-aged women who drank in moderation have a better chance than non-drinkers of staying healthy as they age.
Sugary drinks can accelerate puberty
Experts have linked sugary drinks to early puberty.
A study focused on girls between the ages of 9 and 14 who drank 1 1/2 12-ounce cans a day of non-diet soda.
Those girls had their first periods nearly three months earlier, compared to girls who drank less than two cans a week.
Experts say that young women who get their first periods at an earlier age are at a higher risk of getting breast cancer and endometrial cancer later in life.