However, if you have a life insurance policy "In Force" that you got in the past, and did not lie or omit anything on that application for coverage, then died of a drug overdose, the life insurance policy will most likely pay out the claim for your life insurance.
Keep in mind, the insurance company has a two year period of contestability where they can contest any claim for death that occurs within the first two years you are insured under a life insurance policy.
This means, the insurance company will research the cause of death, any exclusions in the policy, and your answers to all questions on the life insurance application, as well as, your health history, to determine if you lied about a material fact when you applied for your life insurance policy. Material misrepresentation may allow for the life insurance company to deny any claim against your life insurance policy.
In addition, here's how you can learn more about life insurance drug tests and how you may qualify to buy life insurance with no drug tests and no medical exams.