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Drug Class: What is Allegra and why is it prescribed?
Drug Mechanism: How does it work?
Dosage: How should you take this medication?
Possible food and drug interactions when taking this medications
Special information on Allegra
Allegra side effects
| Drug Class: What is Allegra and why is it prescribed? | ||
| Allegra, Fexofenadine is an oral, "second generation" antihistamine that is used to treat the signs and symptoms of allergy that are due to histamine. Allegra relieves the itchy, runny nose, sneezing, and itchy, red, watery eyes that come with hay fever. Its effect begins in 1 hour and lasts 12 hours, peaking around the second or third hour. Allegra is one of the new type of antihistamines that rarely cause drowsiness. In addition, to the antihistamine in Allegra, Allegra-D also contains the nasal decongestant pseudoephedrine. | ||
| Drug Mechanism: How does it work? | ||
| Allegra, Fexofenadine is similar to the other second generation antihistamines loratadine (Claritin), cetirizine (Zyrtec) and azelastine (Astelin). Histamine is a chemical in the body that stimulates the production of mucus and the dilation of blood vessels. Allergy sufferers recognize histamine's effects as a runny nose and swollen nasal passages. Histamine is released from histamine-storing cells (mast cells) and then attaches to other cells that have receptors for histamine. The attachment of the histamine to the receptors causes the cell to be "activated," releasing other chemicals that produce | ||
| Dosage: How should you take this medication? | ||
| Take Allegra and Allegra-D only as prescribed. ALLEGRA The usual dosage is 1 capsule (60 milligrams) twice a day. People with kidney problems should take only 1 dose a day. ALLEGRA-D Take 1 tablet twice a day. People with kidney problems should take only 1 tablet daily. Overdosage An excessive dose of any medicine can have serious consequences. Seek medical attention whenever an overdose is suspected. Symptoms of Allegra overdose may include: Dizziness, drowsiness, dry mouth If you miss a dose Take it as soon as you remember. If it is almost time for your next dose, skip | ||
| Possible food and drug interactions when taking this medications | ||
| Check with your doctor before combining Allegra with erythromycin (E.E.S., Ery-Tab, PCE) or ketoconazole (Nizoral). These drugs may increase Allegra's effects. Allegra-D should never be taken within 2 weeks of using an MAO-inhibitor drug such as the antidepressants Marplan, Nardil, and Parnate. Also check with your doctor before combining it with the following: Mecamylamine (Inversine) Methyldopa (Aldomet) Reserpine (Diupress, Hydropres) You should also avoid Allegra-D if you have a pacemaker and take digoxin (Lanoxin). And you should not combine it with over-the-counter antihistamines | ||
| Special information on Allegra | ||
| Special information if you are pregnant or breastfeeding The effects of this drug during pregnancy have not been adequately studied. If you are pregnant or plan to become pregnant, inform your doctor immediately. It is not known whether Allegra appears in breast milk. If the drug is essential to your health, your doctor may advise you to stop nursing until your treatment is finished. Most Important Fact about this Drug Seldane, an antihistamine related to Allegra, has been implicated in dangerous interactions with the common antibiotic erythromycin, the antifungal medication ketoconazole | ||
| Allegra side effects | ||
| Side effects cannot be anticipated. If any develop or change in intensity, tell your doctor as soon as possible. Only your doctor can determine if it is safe for you to continue taking Allegra. Side effects of Allegra may include: Colds or flu, drowsiness, fatigue, indigestion, menstrual problems, nausea Side effects of Allegra-D may include: Abdominal pain, agitation, anxiety, back pain, dizziness, dry mouth, headache, heart palpitations, indigestion, insomnia, nausea, nervousness, respiratory tract infection, throat irritation WHY SHOULD THIS DRUG NOT BE PRESCRIBED? If Allegra | ||
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