getting rid of pills and insulin

A real concern I had was how to dispose of Ben's pills and leftover insulin. I didn't imagine it would do much good for the planet if the vials of insulin and various drugs for heart, blood pressure and chloresteral hit the water supply all at once. I called the drugstore and found out the procedure. Smash up the pills, mix them with kitty litter and coffee grounds and put them in a plastic bag in the trash. The liquids (insulin) go into special mailing bags costing $2.99 at the drug store pharmacy, but are postage paid, and send them off to a disposal center. The catch here is there is to be only about 1/4 pound per envelope, so that could add up.. I gave Kelsey my meal mallet and said he could have a go at smashing the pills to powder. I thought it might be therapy for him.
No more trouble than is involved in this process, more information should be available. The excess pills process would be useful when prescriptions change, not just for death.