How long after stopping Suboxone does someone have to wait before narcotic painkillers become effective?

24 to 36 hours. Suboxone will be out of the system after 24 to 36 hours. Patients with opioid addiction should be not using any narcotic painkillers after stopping suboxone as it triggers and activates the craving for narcotics, .
It depends. It depends on how high of a dose of suboxone the person was taking per day. A small amount may take one or two days and a higher dose maybe longer. You should know that taking suboxone over time tends to reduce one's tolerance for narcotic painkillers. A person who has been on suboxone may take their usual high dose of painkillers and quit breathing because they thought they could handle it & die.