Fexofenadine is used to treat allergy symptoms such as sneezing, runny nose, itchy throat and eye discomfort.  It is also used to treat hives and itching.


What is Fexofenadine?

Fexofenadine is an antihistamine. It works by blocking the action of histamine, which is the molecule responsible for triggering allergy symptoms.


How should Fexofenadine be taken?

Fexofenadine is administered via oral suspension (tablets and capsules) and it should be taken with a large glass of water.


Side effects associated with Fexofenadine

Among the possible side effects of fexofenadine include the following:


  • Back pain
  • Dizziness
  • Headache
  • Stomach problems


It is important to immediately contact a doctor if you experience:


  • Rash
  • Urticaria
  • Itch
  • Difficulty breathing
  • Tightness in the chest
  • Swelling of the mouth, face, lips, or tongue
  • Earache
  • Fever
  • Severe or persistent coughing/ vomiting


Contraindications and warnings associated with the use of Fexofenadine

During treatment with fexofenadine, drinking fruit juice should be avoided. The effectiveness of the drug may be reduced by some fruits such as grapefruit, apples and oranges. It is also important not take this medication with antacids containing aluminum or magnesium. For more information, it is necessary to contact a doctor or pharmacist. 


Fexofenadine may cause dizziness, which can interfere with the ability to drive or operate dangerous machinery and it may be aggravated by alcohol. It can also interfere with results of skin allergy tests. For this purpose, its use should be discontinued for a few days before undergoing this type of examination.


Before treatment with fexofenadine, it is important to tell your doctor if:


  • You have any allergies to the active substance, its excipients or any other drugs or food
  • You are taking any other medications, herbal remedies or supplements. Mentioning in particular:  erythromycin and ketoconazole
  • You are suffering (or have suffered) from kidney problems or urination problems
  • You are pregnant or breastfeeding


The drug should not be given to the elderly because they are more sensitive to its effects. It should also be avoided in children under the age of six months, as its safety and efficacy have not yet been verified.