(Natural News) Antidepressants and antihistamines are among the most common types of medications people take, and they belong to a class of drugs known as anticholinergics. These drugs can treat a variety of health problems, including COPD, asthma, depression, dizziness, gastrointestinal problems, overactive bladder, and the symptoms of Parkinson’s. Although they can be effective, a large new study has shown that if you take them, you might just be trading one problem for another, possibly bigger one: dementia.