My brother is struggling with addiction, got kicked out, and I’m afraid of losing him

Assalamu alaikum everyone. I’m reaching out because I genuinely don’t know what else to do, and I could use some advice, especially from people who get this from an Islamic lens. I live in the West with my parents, my sister, and my older brother. Until a few days back, we all shared a home. A while ago, my folks discovered my brother was smoking. They tried everything to get him to stop, but their approach ended up making him resent them more. He told me they’d sometimes give him extra hugs, not really out of love, but to sniff him and check for smoke. They’d also secretly go through his room looking for stuff. He felt humiliated, like they saw him as some clueless kid who couldn’t notice what was going on. I think that built up a lot of bitterness between him and our parents. To be honest, my parents aren’t perfect. They’ve got their own problems and made mistakes in raising us when we were little. Personally, I’ve let go of those things and forgave them, but my brother seems to hold on way more than I do. He once told me he remembers every bad thing anyone’s ever done to him and never forgets when he’s been wronged. He also shared that the drugs help quiet his mind. When I asked what he meant, he said without them he might’ve done something really serious. I asked for details, but he wouldn’t give an example, so I still don’t know what was on his mind or what he was hinting at. That talk stuck with me because it made me see there might be a lot bottled up inside him that he doesn’t share. I’ve no clue if he’s using drugs mostly to escape his thoughts, if there’s more to it, or how much his resentment ties to his past experiences. I just know he carries a lot of anger, and I worry about what could happen if things get worse. Sadly, over the years, it did worsen. He started with weed and eventually got into meth. My parents found drugs hidden in his room multiple times. My mother became super anxious and kept checking his room because she was so scared of what he might be hiding. My parents did try to help. They took him to various doctors, and he was on meds for a bit. But he eventually stopped taking them due to side effects we could all see. My parents asked him to tell his doctor so they could figure out a fix, but he insisted he didn’t need the medication anymore and refused to see any more doctors. He also won’t go to any addiction treatment places. Three days ago, my parents found some pills in his room. No one knows what they are. When they confronted him, he basically said they either accept him as he is, without pushing him to change, or he’d leave the house. My parents couldn’t agree to let things go on like this, so they told him to go. He asked for two days to get ready, but they only gave him one. The next morning, they woke him up early, told him to pack his things, and leave. He asked them for some money, and they gave him less than he wanted. Now he’s gone. I get why my parents reached this point. They’ve spent years worrying and trying to help, and I know it’s taken a lot out of them. But at the same time, I can’t stop thinking about my brother out there alone, using substances and turning down help. I’m genuinely scared something will happen to him. Yesterday, before he left, I spoke with him about Islam. He’s never really prayed, so I asked if he actually believes in Allah and Islam. He told me he does, and he sounded sure. He also mentioned he’d been meaning to start praying for a while but just hadn’t gotten around to it. I told him he should begin praying because none of us know when we’ll pass, especially when he’s taking drugs that could be deadly. He agreed. I also suggested he try to slowly cut down on drugs. I didn’t mention doctors again since he’s made it clear he doesn’t want their help. He keeps saying he can quit anytime, but honestly, I’ve no idea if that’s true. I keep replaying that conversation. I don’t know if I said the right things or if there was more I should’ve told him. I wish I could’ve done more before he left. I miss him already, and I still have his number. I wanna keep in touch and make sure he knows I’m here for him, but I’m scared of saying the wrong thing and pushing him further away. I don’t want every chat to turn into a lecture about drugs, but I also can’t act like everything’s fine when I’m truly worried about his life. My mother’s been crying for days and can barely function. My father keeps trying to calm her down, but I can see how much this is breaking him too. Our whole family is hurting, and I feel completely helpless. As Muslims, I know we should never lose hope in Allah’s mercy. I keep making dua for my brother, asking Allah to guide him, protect him from harm, and bring him back to the right path. But I’m struggling with the fear of what might happen before he gets there. I’ve got a few questions for you all: 1. How should I handle things with my brother Islamically? How do I advise him without making him feel judged or driving him away? 2. Should I keep reminding him about salah and his bond with Allah, or could that make him avoid talking to me? 3. Is there anything from the Quran or Sunnah that could help me figure out how to deal with this? 4. For those who’ve had family members battle addiction, what actually helped? How did you stay close without supporting their habits? 5. Has anyone experienced a family member who seemed totally lost and eventually found their way back to Islam and a better life? I know every case is different, but I really need some hope right now. I love my brother so much. I don’t wanna give up on him, and I’m terrified of losing him. I just don’t know what my role is anymore or what I can really do to help. Please keep him in your duas. May Allah guide him, protect him from the harm he’s doing to himself, soften his heart, and grant my parents sabr in this tough time. May Allah also guide me to be the best sibling I can be for him. Jazakum Allahu khairan.