It's not easy is it .... I think the first word on the second line is 'exhaustion'. The word after 'long' may be 'continued' ... then possibly 'use of' ...

I am seeing 'Chronic' as the first word however I am not confident in that guess - now that I
think I see it I cannot see it as anything else.
Someone might be able to work out the cause of death, but I would say that it is worth requesting a better copy.

Added: what age was the person who died and were they male or female?