Telfast (Fexofenadine Hydrochloride) is a non drowsy antihistamine used to provide rapid 24 hour relief from hay fever, hives and allergies. It works by blocking the histamine H1 receptors. This prevents the allergic response that is normally triggered by the release of histamine. Allergies generally occur due to your body`s hypersensitive reaction resulting from direct contact with or inhalation of allergens. The resulting overactive response from the immune system can cause an itchy skin rash, watery eyes, hives, rhinorrhea and sneezing.
On contact with an allergen, the mast cells in the body will release a high volume of histamine. This protein is a naturally occurring component in the body, and is use as part of its defense mechanisms. Following its release, it acts on the H1 receptors and triggers an increase in the amount of blood supplied to the affected area as well as the further secretion of allergic chemicals. This causes the common allergy symptoms we associate with hay fever, some of which may resemble cold and flu symptoms.
In order to combat this, you physician may recommend treatment with an antihistamine medicine (such as this one). It works as an antagonist of the peripheral histamine H1 receptors, and selectively blocks them. When the body is affected by an allergen (such as mould, the venom from an insect bite or pollen) the histamine released by the body`s mast cells is prevented from attaching to its receptors, and its effects are blocked. Because of this, relief from a blocked nose, excess mucus, sneezing, watering of the eyes and skin allergy symptoms can be effectively treated with this medicine. This reduces the burden of allergies and minimizes disruption to your daily routine.
- Fatigue and a sleepy feeling
Even mild side effects need to be reported to your physician, as it could be the sign of a more serious reaction. You must stop using the medicine and see your physician as soon as possible if you notice any reactions that are of a serious and potentially dangerous nature, so that you can get the medical attention you need.
Patients who are sensitive to pollen may be advised to minimize going out during the hay fever season, especially if it is hot or windy. This may help to minimize exposure to allergy triggers.