Most allergy medications work by stopping the chemicals that produce allergy symptoms. So for example, you have an allergen, your cells – that allergen attacks the cell, the cell bursts open, and these chemicals are released. And those cause the runny nose, the itchy eyes and the cough. The medication stops that allergen from connecting to the cell. So if you already have symptoms it means that cell has already burst open and released that chemical. So that’s why it’s really important to stay ahead of the game and stay on your allergy medicine. Because if you take your medication after those chemicals are released, then it’s not going to be as effective.