NEED TO KNOW

In her new memoir, Sister Wife , out Sept. 2, Christine Brown Woolley opened up about privately battling a brief addiction to oxycodone offscreen

She was prescribed the medication after undergoing surgery for an ACL tear

"It was very difficult, and even though I was on it for a month, the effects of it lasted at least six," she tells PEOPLE exclusively

Much of Christine Brown Woolley 's life has appeared on her family's hit TLC series Sister Wives since the show premiered in 2010. Still, there were things she chose to keep to herself — until now.

In her new memoir, Sister Wife , out Sept. 2, Christine opened up about privately battling a brief addiction to oxycodone offscreen. Her reliance on the medication occurred after she was prescribed to use it following

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