Up to 30 percent of people with allergies are allergic to cats or dogs, according to the Asthma and Allergy Foundation of America. Pet allergies are caused by a reaction of the immune system to the proteins found in animal dander, according to MayoClinic.com. While avoidance is the best treatment for pet allergies, some people need medical intervention to prevent and treat common pet allergy symptoms. Allegra is a prescribed drug to treat airborne allergens, such as pet dander.
About
The active ingredient in Allegra is fexofenadine, an antihistamine, according to Drugs.com. Allegra works by restricting the body from producing histamine, a chemical/hormone that causes symptoms such as sneezing, nasal congestion and watery eyes. Allegra is also prescribed to treat hives or other skin rashes related to pet allergies.
Cause
Pet allergies are caused by proteins found in the liquid secretions from the animal, according to MayoClinic.com. The liquid secretions stick to the hairs or fur of the animal and can become airborne, affecting the nasal passages. It can take weeks for pet dander to clear from an environment that has been exposed to an animal. If a person is allergic to pet dander, exposure to the substance will cause the immune system to overreact, producing histamine. Histamine causes increased blood flow and irritation in the eyes, nose and lungs.
Dose
The dose of Allegra will be determined by the doctor. Do not take more than is prescribed because that can cause harmful side effects. Drugs.com states that the tablet should stay in the blister pack until the user is ready to take the medication. Use dry hands to remove the drug and place it in the mouth immediately. Do not chew or swallow the pill, but let it dissolve in the mouth.
Effectiveness
Allegra is an effective drug to treat pet allergies when taken as prescribed, according to Drugs.com. The Asthma and Allergy Foundation of America states that avoiding exposure to pet dander is the most effective treatment for a pet allergy. Practice avoiding animals while taking Allegra. If exposure to pets stops, talk with the doctor about stopping the use of Allegra.
Considerations
Allegra should be taken at least one hour before eating a meal, according to Drugs.com. Avoid taking the medication with fruit juices because the acid in some juices can make it more difficult for the body to absorb the medication. Other drugs can affect the effectiveness of Allegra. Disclose all over-the-counter and prescribed medications currently being taken to avoid complications.
