Discover what you can do to avoid the most common poison? This poison kills more than any other.

What is the most dangerous poison in your house? It's not what you think.

Here's a surprise: prescription medications kill more people than any other source of poisoning, according to the American Association of Poison Control Centers.  Some medications, such as the antibiotic, tetracycline, degrade into a toxic form over time.

Unlike adults whose bodies can withstand higher levels of poison, a single dose of heart medications or pain pills can kill a child.  According to a recent study by the Annals of Emergency Medicine, nearly 10,000 small children accidentally swallowed opiate pain killers between 2003 and 2006.

What do you do to avoid these hidden poisons sitting in your bathroom cabinets? Should you throw out old and expired medications?  NO!  Medications flushed down the toilet can end up in drinking water and water treatment plants can't filter out medication.

If you don't live near a drop-off site, the Food and Drug Administration recommend that you do the following: Take medications out of their original packaging and put them in a container that can be tightly sealed, such as a coffee can.  Mix them with coffee grounds, kitty litter or anything that makes them undesirable. It is also recommended that you lock up all medications and talk to your kids about the dangers of prescription medications.

Lesson of the day: dispose of expired and old prescription medications before they pose a dangerous poison to your kids.