2 sons addicted to crack

I have 2 sons addicted to crack and possibly other drugs, one son is 37 the other 34. on top of this my oldest is very ill, he was born with a kidney disease and over the last 4 years he had both kidneys removed, last year he bowel perforated, he almost died, he now has a colostomy bag, and he has dialysis 4 times a week, 2 weeks ago we was told he has renal bone disease, he has suffered drug addiction from the age of around 15. He begs borrows and steals. He will sell anything that’s not nailed down. My other son has had a bad addiction for the past 8 months I would say, he is also ill with type 1 diabetis, he looks like a skeleton, his marriage has broke down he forgets to take his insulin, and has just left his rented house to live with his cousin, I have just discovered that he has sold items from the house and left owing £500 rent. Im at my wits end, 2 poorly sons both on crack!