Antihistamines, H1. Histamine antagonists or antihistamines are drugs that relieve allergy symptoms.Histamine is a chemical used to identify and remove substances that trigger an allergic response. Ã¢ There are four histamine receptors &#40;designated H<sub>1</sub>, H<sub>2</sub>, H<sub>3</sub>, H<sub>4</sub>&#41;.
Quick Answer. Blocked condensation drain lines often cause excessive amounts of water in an air conditioner drain pan. These lines are designed to funnel excess water from condensation away from the air conditioning system inside the home. If these lines become blocked, the excess water drains into a drain pan.
What happens when you put air in a tire filled with Nitrogen. I HATE BIG-O TIRES!!!!! My wife just had tires put on her Freestyle. I lookd at the bill when she brought it home and noticed they filled the tires with Nitrogen and charged her $30 to do it.e: What happens when you put air in a tire filled with Nitrogen. Originally Posted by kwspony one thin I know is that nitrogen particles are larger then air so the tire will leak less from just sitting.