A jury awarded $8 billion in punitive damages to a man who accused Johnson & Johnson, the drugmaker, of failing to warn that young men using its antipsychotic drug Risperdal could grow breasts. Analysts called the amount excessive, particularly since the plaintiff, Nicholas Murray, had already won $680,000 in compensatory damages over his claims.

J&J said the award was “grossly disproportionate with the initial compensatory award” and said it was confident it would be overturned.

The Philadelphia Court of Common Pleas verdict was the first in which a Pennsylvania jury had been able to consider awarding punitive damages in one of thousands of Risperdal cases pending in the state.

In 2013, Johnson & Johnson paid more than $2.2 billion to resolve civil and criminal investigations by the U.S. Department of Justice into its marketing of Risperdal and other drugs.

According to a recent filing, the company faces some 13,400 lawsuits tied to Risperdal, which allege the drug caused a condition called gynecomastia in boys, in which breast tissue becomes enlarged.

Risperdal was approved by the U.S. Food and Drug Administration in 2002 to treat schizophrenia, but was not cleared for use in children until 2006. While the drug’s label does note that gynecomastia was reported in 2.3% of Risperdal-treated patients in clinical trials involving 1885 children and adolescents, the lawsuits generally claim the company understated the risk.

Johnson & Johnson is also among drugmakers named in lawsuits seeking to hold the pharmaceutical industry responsible for the nation’s opioid crisis and in August was asked to pay $572.1 million to the state of Oklahoma for its role in fueling the epidemic.