Drug Description

Allegra is a prescription drug used for the treatment of allergic symptoms, such as nasal itching, head cold, tearing and sneezing. This drug is available both in branded and generic version.
The main ingredient of Allegra is fexofenadine, and its working mechanism is very simple. It decreases the levels of histamine in the human body. This chemical is responsible for triggering allergies. Allegra belongs to the group of drugs called antihistamines and classified as the second generation antihistamine. The drug usually starts acting 1 hour after the intake.


Allegra is used to relieve the symptoms of all types of allergies, related to the upper respiratory system (for example, itching or redness of nose and eyes). These allergies can be triggered either by outdoor or indoor allergens. The drug can be used by kids and adults. It can also be used for the treatment of hay fever, caused by some polluting hazardous substances, as well as the treatment of pet allergies.


This drug is available in the following dosages: 30 mg, 60 mg and 180 mg. Adults and kids over the age of 12, the recommended dosage is 60 mg two times a day or 180 mg in a single dose.
Allegra must be taken with water on any empty stomach. This drug is available in two different versions intended for 24 hour and 12 hour use.

Skipping the dose/overdose

Try to take your drugs at the same time to avoid missing the dose. However, if you have skipped it, take the dosage as soon as possible. If it’s already time to take the next dosage, you should skip the missed dose take only the scheduled one. In case of overdose, call for poison helpline or rush call the emergency immediately.

Adverse effects

As any other drug, this medicine may cause some adverse effects. Some patients can be allergic to the main component of this drug and suffer from the following reactions: breathing difficulty, pain in the body, cold and fever. If such adverse effects happen, consult the doctor as soon as possible. Other common adverse effects that may be caused by the use of this drug are head pain, nausea, stomach upset, painful menstrual and pain in the back. However, these adverse effects may be also caused by the use of poor-quality drug.

Drug interaction

Such drugs as Ketoconazole or Erythromycin may interact with this drug. Therefore, you should inform your physician if you’re using these medicines. Anti-depressants, sleeping pills, anesthetics can increase the drowsiness caused by this drug. Inform your doctor about all the medicines (including the prescription and non-prescription drugs) you’re taking to ensure your safety.