Sites across the U.S. will be accepting old, unneeded medications this weekend.

It's an effort to properly dispose of pills and liquid medications sitting in medicine cabinets, posing potential dangers if they were to fall into the wrong hands. They also, in many cases, pose a risk to the environment if flushed down the toilet.

The event, National Prescription Drug Take Back Day, happens Saturday from 10 a.m. to 2 p.m. A number of law enforcement agencies, as well as some pharmacies and hospitals, are participating.

To find a location near you, head here or call (800) 882-9539.

If you're unable to take part in Saturday's event, a small number of sites take unused medications daily. Enter your ZIP code here to find one near you.

Items accepted are:

- Pills, tablets and capsules

- Blister packs

- Ointments and creams

- Inhalers and nebulizer solutions

- Liquid medications

Items not accepted include:

- Needles and syringes

- Thermometers

- Home-based care equipment

- Vitamins

- Trash