There are many locations in the Seattle and outlying areas where you can dispose of expired and unwanted medicines. Check out the https://med-project.org/ website to see a comprehensive list of locations in King and Snohomish County. Many pharmacies, police departments and health care locations are drop off locations for unwanted medicines. Some libraries are offering mail-back packaging to mail in old medicine for free.
Accepted medicines: Medications in any dosage form, except for those listed below, in their original container or sealed bag. This includes pet rx/medicine.
Not accepted medicines: Herbal remedies, vitamins, supplements, cosmetics, other personal care products, compressed cylinders, aerosols, inhalers, medical devices, pet pesticide products, sharps, illicit drugs, iodine-containing medications.
Search for locations on the following websites:
keywords: medicine, rx, pet medicine, pet rx