Everything became life-threatening when she suffered from depression. It's natural to feel depressed when it became a daily routine of everyday life. The person doesn't feel worthy to live without drugs. The urge to take stimulant drugs but not wanting to interact or speak, thus it creates a self-struggle within her.
Later on, she referred a psychiatrist for depression but again left the sessions in the middle. Till that time, the anti-depressants took over a troll on her body and brain. Her brain nearly collapsed without drugs.
By that time, Li Na's body relied so much upon drugs that whenever her nervous system becomes fully conscious she will lose her self-control in a mere 8 to 10 hours after the last dosage.
Causing the instant shut down of her brain activities, headaches with heavy dizziness, muscle aches, and pains. And the excessive use of certain kinds of medication causes the nose to bleed.