Critics have argued about the role that opium addiction played in the poet's life and work.

Usually, he did not have enough time to get along with his children because of opium addiction.

Though Qu's father took a job as teacher, he was unable to earn enough money to support his family due to an opium addiction.

Throughout history, opium addiction has accompanied trade, travel and prosperity.

It was a period of revolution and civil strife, but all the Chinese were determined to stamp out opium addiction from their country.

Those few who returned were demoralized and often exposed to opium addiction.

The majority of the cases he treated were eye disease, opium addiction, and cases involving surgery.

He acknowledged that there probably were elderly people in the community who had brought their opium addiction with them from Laos.

Decades of war and the opium addiction of their parents have left many Afghan children homeless.

At that time, opium addiction constituted a significant problem in the civilian population of the Philippines.