How to help my addicted friend?

How can i help my friend?

So here is the thing ,there is this new friend of mine in my neighbourhood who suffer from alcohol and nicotine addiction and he is always fighting with his family , and his mom told me that she try EVERYTHING from therapy,rehab etc and he is not able to recover from that mental state, at some point when she was talking to me crying i just told a whole other story about psychedelic treatment with microdosing and such, and immediately she gave me 200 dollar and i was so confused cause she seem so happy there is a another option to help and even her son has some info about this cause he sometimes hang around with us when we trip. Now the question is i feel like i have to return the money and tell her just i am not able now??cause i dont want to break her hope since microdosing itself is not the cure.whats your thought in this???