Final answer:
Orally administered decongestants have a shorter duration of action compared to nasal sprays.
Step-by-step explanation:
The benefit of orally administered decongestants is shorter duration. Oral decongestants typically have a shorter duration of action compared to nasal sprays. They are rapidly absorbed into the bloodstream and provide relief for a shorter period of time. A benefit of orally administered decongestants for a gardener with seasonal allergy problems is the lack of rebound congestion and prolonged decongestant effects. Oral decongestants such as pseudoephedrine work systemically rather than locally and do not cause the rebound congestion often seen with the overuse of nasal spray decongestants. These systemic agents can provide longer-lasting relief from nasal congestion without the rapid return of symptoms that can occur when the effects of a topical nasal spray wear off.