Pfizer Inc. won a key lawsuit in China for the patent protection of Viagra, the Wall Street Journal Online reported on Saturday.
Viagra is one of Pfizer's most popular prescription drugs in the fastest-growing Chinese market.
"We welcome the court's decision," Pfizer spokesman Paul Fitzhenry to the paper. "It reflects China's commitment to creating an effective patent-protection environment and boosts the confidence of the business community in China as an investment location."
The decision overturns a two-year-old ruling by China's patent review board that sided with a group of generic-drug makers that had challenged Pfizer's patent.
Though the ruling could be appealed, a spokesman for the Chinese drug maker group said that it was unlikely one would be filed, according to the paper.