Allegra, with the generic name of Fexofenadine, works against chemical histamines that are naturally occurring in the body.
Allegra Indications

Allegra is used to control:
Sneezing
Runny nose
Itchy or watering eyes
Other allergic symptoms
Allegra Warnings/Precautions

Dosage adjustments or special monitoring may be required to patients with either heart, liver, or kidney disease if they are to undergo treatment with Allegra. It is therefore advised to have a talk with your doctor first before deciding to take this drug.

Allegra belongs to a class of drugs called FDA Pregnancy Category C. Do not take this drug if you are pregnant without consulting your doctor first as it is not known how it can affect an unborn child.

Breastfeeding mothers are also suggested to see their doctor before taking Allegra as it is not certain if it passes through breast milk.

This drug is not approved for use by children below 6 years old, and for patients with allergic reactions to Fexofenadine.
Allegra Intake Instructions

Take Allegra as directed by your physician. Normally it is taken twice a day, in the morning and in the evening. Each dose is taken with a full glass of water.

If there is any instruction in the label that appears unclear to you, ask your doctor, nurse, or pharmacist to explain it to you.
Allegra Missed Dose

Unless directed by your doctor, Allegra must not be double dosed. If you happen to miss a dose, take it as soon as you remember as long as it is not almost time for the next scheduled dose. Otherwise, skip missed dose and proceed with the next.
Allegra Overdose

If symptoms of over dosage are suspected, consult your doctor for the proper medical action.
Allegra Side Effects

Stop intake of Allegra and seek immediate medical attention if you experience any of the following allergic reactions:
Difficulty in breathing
Closing of the throat
Swelling of the lips, tongue, face, or hives

Severe side effects are unlikely to occur. However, should you feel nausea or stomach upset, inform your doctor and still continue use of Allegra.

For other side effects not mentioned that are particularly causing discomfort, tell your doctor immediately.

FEXOFENADINE (Allegra®) is an antihistamine. It reduces allergy symptoms of hay fever (seasonal allergic rhinitis), and may reduce itching of the skin in those people with chronic itchy skin rashes. Generic fexofenadine capsules and tablets are available.

What should I tell my health care provider before I take this medicine?
They need to know if you have any of these conditions:
•kidney disease
•an unusual or allergic reaction to fexofenadine, terfenadine, other medicines, foods, dyes, or preservatives
•pregnant or trying to get pregnant
•breast-feeding

How should I take this medicine?
Take fexofenadine tablets by mouth, with a sip of water. Do not take this medicine with grapefruit, orange, or apple juice because they may change how well the medicine works. Follow the directions on the prescription label. Take your doses at regular intervals. Do not take fexofenadine more often than directed. You may need to take it for several days as prescribed before your symptoms improve.

Contact your pediatrician or health care professional regarding the use of this medicine in children. Special care may be needed. Fexofenadine is usually prescribed for children 6 years of age and older.

What if I miss a dose?
If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

What drug(s) may interact with fexofenadine?
•antacids
•erythromycin
•grapefruit, apple, or orange juice
•ketoconazole
•rifampin

In addition, the following medicines can make you feel drowsy:
•alcohol
•barbiturate medicines for inducing sleep or treating seizures (convulsions)
•medicines for anxiety or sleeping problems, such as alprazolam, diazepam or temazepam
•medicines for hay fever and other allergies such as antihistamines
•medicines for mental depression (antidepressants)
•medicines for mental problems, anxieties and psychotic disturbances
•medicines for pain such as opiate analgesics (e.g. codeine)

Tell your prescriber or health care professional about all other medicines you are taking, including non-prescription medicines, nutritional supplements, or herbal products. Also tell your prescriber or health care professional if you are a frequent user of drinks with caffeine or alcohol, if you smoke, or if you use illegal drugs. These may affect the way your medicine works. Check with your health care professional before stopping or starting any of your medicines.