IMPAX Laboratories, Inc. Confirms Patent Challenge Relating to Generic FENTORA®
HAYWARD, Calif.--(BUSINESS WIRE)--Impax Laboratories, Inc. (NASDAQ: IPXL) today confirms that it has initiated a challenge of the patents listed in the Orange Book in connection with Fentora® (fentanyl buccal tablets, 100 mcg, 200 mcg, 400 mcg, 600 mcg and 800 mcg).