I live in GA and am subceptible to pollen and other spring time allergies. I take a daily 24hr Claritin D to help alleviate my symptons. Recently, I have noticed that I will have severe nasal problems (runny nose, itching, sneezing) if I wake up early in the morning (8am). The symptons continue throughout the day despite my medication. However, on days in which I wake up voluntarily (12 noon) I will have virtually no sinus issues, with or without Claritin D.
I have thus concluded a relation between getting adequate hours of sleep and a badly irritated nose or lack thereof. So what is the explanation for this?