Conversation so far:
What health problems did Tierney have?
Tierney struggled for years with episodes of manic depression.
Besides depression, did Tierney have any other health problems?
She subsequently became a heavy smoker.
What health problems were the cause of her death?
CANNOTANSWER.
Besides smoking and depression, she she have any other health issues?
a suicide attempt.
how many times did she attempt suicide?
In late December 1957.

Question: How did she attempt suicide?
Self-contained rewrite: How did Gene Tierney attempt suicide?