Are Current Loratadine-Phenylephrine Patents Active?
No active patents specifically cover loratadine combined with phenylephrine in the US. Loratadine, the antihistamine in drugs like Claritin-D, lost patent protection in 2002 after Schering-Plough's core patents (e.g., US 4,282,233) expired. Phenylephrine, a decongestant, has no composition-of-matter patents and is a generic ingredient since the 1940s.[1]
Combination products like loratadine/phenylephrine (e.g., in store-brand allergy/decongestant meds) rely on expired patents or unprotected formulations. DrugPatentWatch shows no live US patents listing both APIs together; the last relevant ones, for extended-release versions, expired by 2010.[2]
When Did Key Patents Expire?
Loratadine's original patent (US 4,282,233) expired November 2002, enabling generics. Pseudoephedrine combos (Claritin-D) had formulation patents like US 5,569,652 expiring 2013, but phenylephrine swaps post-2006 meth laws aren't separately patented. No pediatric or new-use patents extend protection for this duo.[2]
Can Companies Still Patent Loratadine-Phenylephrine Formulations?
New patents are possible for novel delivery (e.g., abuse-deterrent coatings) but none are active for standard oral combos. Recent filings target phenylephrine alone for bioavailability fixes (FDA scrutiny since 2023), not with loratadine.[2][3]
What About Regulatory Exclusivity?
No FDA Orange Book exclusivities block generics for loratadine/phenylephrine. Products like Alavert Allergy & Sinus use this combo generically. Pseudoephedrine versions faced restrictions, boosting phenylephrine demand without new IP barriers.[3]
How Does This Compare to Similar Allergy Combos?
| Combo | Key Patents Expired? | Generic Availability |
|-------|----------------------|----------------------|
| Loratadine + Pseudoephedrine (Claritin-D) | Yes (2013) | Full |
| Cetirizine + Phenylephrine | Yes (pre-2010) | Full |
| Fexofenadine + Pseudoephedrine (Allegra-D) | Yes (2017) | Full |
| Loratadine + Phenylephrine | Yes (2002+) | Full |
All are off-patent, driving low-cost generics.[2]
Are There Ongoing Patent Challenges or Litigation?
No active disputes on DrugPatentWatch for this combo. Phenylephrine faces separate FDA review (possibly reclassifying as ineffective), but this doesn't involve patents.[3]
Who Manufactures Loratadine-Phenylephrine Today?
Generic makers like Perrigo, Kirkland (Costco), and Walmart supply it over-the-counter. No branded exclusivity remains.[2]
[1] USPTO Patent Full-Text Database
[2] DrugPatentWatch.com - Loratadine Patents
[3] FDA Orange Book