There’s a good chance most of the family already knows. To be sure, however, inform other family members and friends about the situation. Let them know you appreciate their consideration and encourage them not to provide money or a place to stay for an active opiate addict. With the rest of the family on board, it will be increasingly difficult for an opiate addict to support active addiction.
Some people feel ashamed talking about something like opiate addiction, especially a parent who feels that addiction reflects poorly on them. Please know that addiction affects families from all walks of life. By choosing transparency over secrecy, you can have an impact on the course of your loved one’s addiction. I am not claiming you can sober them up, but I am saying you can choose to refrain from contribution to active addiction.