Is it possible to euthanize a dog, using sleeping pills sold for human use?

My old dog is suffering, not eating and has lost a lot of weight. She is breathing heavily and can't get up without help. I would much prefer to have her go to sleep at home with the family at her side. She is terrified of the vet's office, and I hate to have her last moments be full of... show more My old dog is suffering, not eating and has lost a lot of weight.
She is breathing heavily and can't get up without help.

I would much prefer to have her go to sleep at home with the family at her side. She is terrified of the vet's office, and I hate
to have her last moments be full of stress.

Has anyone tried sleeping pills to euthanize a pet?
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