Pollen/ Dust Allergy

Patient: I am suffering from allergy (pollen or dust). I am suffering for last 3 months. The runny nose and sneezing is worst in the morning. Then it gets better. Some days it does not. I am taking antihistamine tablets. Previously I had taken cetrizine. Because of drowsiness, i switched to vozet. Though the allergy symptoms are less severe still I am suffering at least 1-2 hrs after i wake up. And also if i miss a dose the next day is the worst.Is there any permanent solution(any strong alternative medicine) or i have to continue with antihistamine tablets?