I've lived in San Antonio all my life. Seasonal allegies are a given. Then my wife and I moved to the Hill Country. Cedar Everywhere! We were sick more often and for 4-5 days. Not 2-3.
Doctor recommended Flonase for daily use. One shot each nostril before bed each night.
That has drastically reduced our Cedar Fever problems. Hardly ever sick. And if we are - it is less severe.
Afrin works pretty good, but I like Flonase.