MINNEAPOLIS (WCCO) — The rising usage rate of antidepressants is impacting fish in the Great Lakes.

The drugs are flowing through wastewater treatment plants, meaning that people are flushing their prescriptions.

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Researchers from the University of Buffalo found antidepressants in 10 species of Great Lakes fish, including bass and walleye.

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Scientists say they’re worried the drugs will leave the fish so chilled out they won’t be able to fight off predators.

In a 2013 study, researchers with the University of Wisconsin-Milwaukee found that antidepressants can cause fish to become anxious, antisocial and homicidal.

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Females exposed to drugs produced fewer eggs. Meanwhile, the males became more aggressive, sometimes even killing the females.