What are the best pills for nasal decongestion?

None: Pills might not be the answer, but it depends on the problem. Viral illness will resolve on its own schedule, and decongestants might help, but time helps more. Allergies might respond to oral antihistamines like zyrtec, allegra, claritin. Excessive use of nasal sprays can result in chronic swelling which seems worse when the medication is stopped.