This is Dr. David
you can read more here
9-10 grams of Nembutal or Pentobarbital is a fatal dose.
I don't know how many milligrams are in his pills.
your friend should ask the help of hospice nurses and doctors to help him be comfortable
there are hospice care services which are free of charge here in the USA who could help him.
let me know if you have other questions.
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