OTC Products: How Much Is Too Much?

Most Americans don’t think twice about taking over-the-counter medication to treat a variety of ailments.

Before seeing a doctor, many take non-prescription drugs for such conditions as allergies, colds and fluheadachestoothaches and constipation. In 2015, U.S. residents made nearly 3 billion retail trips to buy OTC products, according to the research organization IRI based in Chicago.

Taken as directed, non-prescription medications are typically safe and effective, says Dr. Michael Lynch, a toxicologist at the University of Pittsburgh Medical Center and director of the Pittsburgh Poison Center. But some OTC drugs can cause health problems and even death if taken in the wrong dosage or in the wrong combination with other medications, including prescription meds.

US News