I'm going to empty my parents' medicine cabinet while they are in bed.
What is your reasoning for emptying the medication out of the cabinet?
I will sleep well knowing that I have put them in a worse situation.
Your parents medicine chest is their private space and you rifling through it is a breach of their trust. Keep out of places where you don't have permission to be.
So I should leave this all up to my parents?
You wouldn't like it if your parents went through your personal space and things and they wouldn't want this done to them, as it's wrong. Your parents' medication is for them and not your business. Don't take what is not yours.