Diabetes symptoms are silent, so you may not notice an immediate repercussion when you neglect to take your medicine — and that means far too many people decide against taking prescribed medications (or "forget" to take them). Don't be one of them! Untreated diabetes carries the grave risks of heart disease, nerve damage, and other complications. Take medications or insulin as directed by your physician. If you have uncomfortable side effects or questions about your medication or treatment plan, talk with your doctor.