Erdős’s friends worried about his drug use, and in 1979 Graham bet Erdős $500 that he couldn’t stop taking amphetamines for a month. Erdős accepted, and went cold turkey for a complete month. Erdős’s comment at the end of the month was “You’ve showed me I’m not an addict. But I didn’t get any work done. I’d get up in the morning and stare at a blank piece of paper. I’d have no ideas, just like an ordinary person. You’ve set mathematics back a month.” He then immediately started taking amphetamines again.
His biography “The Man Who Loved Only Numbers” is a very good interesting book.
Also, there was quite a bit more to Godel's death than simply dying "from starvation and exhaustion"!
https://en.wikipedia.org/wiki/Kurt_G%C3%B6del#Later_life_and...
Gödel's story is certainly a fascinating one. However, he did have a paranoid fear of being poisoned most of his life and weighed 30kg when he died - of malnutrition.