DEAR DR. ROACH: My roommate will throw out food that is one day past the expiration date, but has prescription drugs that are over 10 years old in the medicine cabinet. Are old drugs dangerous or just ineffective? R.D.
ANSWER: I think your roommate is wrong on both counts: Most food is good at least a few days after its listed expiration, and keeping expired medication way past its due date is potentially dangerous.
