George W. Bailey / Shutterstock.com Flea Products Hazardous Waste George W. Bailey / Shutterstock.com Never Dump Down the Drain Flea products contain chemicals that can harm waterways, so never dump them in the trash or down the drain. Instead, dispose of them as Household Hazardous Waste. Empty Containers Go in the Trash If the flea product container is empty, throw it in the trash. Also throw away single-use pipettes. Did You Know? Oral vs. Topical Medication Some pesticides used in topical flea and tick medications are known to infiltrate waterways and pose a risk to wildlife. Using flea and tick medications administered orally can help prevent pesticides washing into our waterways. Talk with your vet about choosing the flea and tick medication that is right for you and your pet.