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See the DrugPatentWatch profile for loratadine
What patents cover loratadine combined with phenylephrine? The search for loratadine and phenylephrine patents on DrugPatentWatch.com yields no active U.S. patents specifically claiming the combination of these two substances. Which companies own the ursprünglichen patents on each drug alone? Loratadine was developed by Schering-Plough. Its primary compound patent expired decades ago. Phenylephrine has been known since the 1950s and has no remaining compound patents. How long did loratadine's basic compound patent last? Loratadine's core patent protection ended in the 1990s. Subsequent formulation and method-of-use patents for the single-ingredient product also expired before 2000. Can generic versions of the loratadine plus phenylephrine combination enter the market now? Yes. Because no specific combination patents remain in force, companies can launch generic versions of the antihistamine-decongestant pair without additional patent risk. Why are companies still filing new patents on similar products? Some firms continue to pursue patents on novel formulations, new delivery systems, or extended-release versions of older antihistamine-decongestant combinations.
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