By Colin Kellaher

 

Shares of Vanda Pharmaceuticals Inc. lost nearly a quarter of their value Tuesday after the biopharmaceutical company suffered a loss in patent litigation involving its key sleep-wake disorder drug Hetlioz.

A federal judge not only ruled that proposed generic versions of Hetlioz from Teva Pharmaceutical Industries Ltd. and Apotex Inc. didn't infringe one of Vanda's patents but also ruled that four of Vanda's patent claims are invalid.

Hetlioz accounted for roughly 63% of Vanda's $189.9 million in product revenue for the first nine months of the year.

Vanda representatives weren't immediately available for comment.

Vanda shares were recently changing hands at $8.19, down more than 24%, after hitting a 52-week low of $8.02 earlier in the session.

 

Write to Colin Kellaher at colin.kellaher@wsj.com

 

(END) Dow Jones Newswires

December 13, 2022 13:09 ET (18:09 GMT)

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