Emergency Drug intervention. Need answers as soon as possible please!?

I just discovered that a loved one is shooting dilaudid (8x stronger than morphine). He has a bad heart and several other health conditions. I would like advice on how to approach him next morning. I fear for his life, so any insight would be helpful. Thanks
With my confrontation i am offer to pay for a daily methadone treatment and to attend N.A. meetings with him. I am just wondering if i should be hard or soft with him on this. thanks for the info so far.

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