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Side Effects From Allegra D

Side Effects Of Allegra D 24 Hour Effect Choices


Allegra D is a commonly used medication for the treatment of allergies and nasal congestion. It is a combination of two active ingredients: fexofenadine, an antihistamine, and pseudoephedrine, a decongestant. While Allegra D is generally safe and effective, it is important to be aware of the potential side effects that may occur.

Common Side Effects

Some of the common side effects of Allegra D include:

  • Dry mouth
  • Nausea
  • Headache
  • Dizziness
  • Insomnia

These side effects are usually mild and temporary. If they persist or become bothersome, it is advisable to consult a healthcare professional.

Less Common Side Effects

In some cases, individuals may experience less common side effects from Allegra D. These may include:

  • Increased heart rate
  • High blood pressure
  • Restlessness
  • Irritability
  • Anxiety

If any of these side effects occur, it is important to seek medical attention promptly. These symptoms may indicate a more serious reaction to the medication.

Allergic Reactions

In rare cases, some individuals may experience allergic reactions to Allegra D. Symptoms of an allergic reaction may include:

  • Hives
  • Swelling of the face, lips, or tongue
  • Difficulty breathing or swallowing
  • Rash

If any of these symptoms occur, it is important to seek immediate medical attention. Allergic reactions can be serious and require prompt treatment.

Precautions and Warnings

Before taking Allegra D, it is important to inform your healthcare provider about any existing medical conditions, including:

  • Heart disease
  • High blood pressure
  • Thyroid problems
  • Diabetes
  • Glaucoma

Additionally, it is important to disclose any medications, including over-the-counter drugs and herbal supplements, that you are currently taking. Some medications may interact with Allegra D and cause adverse effects.

Use in Pregnancy and Breastfeeding

The use of Allegra D during pregnancy and breastfeeding is not recommended without consulting a healthcare professional. The effects of the medication on the developing fetus or nursing infant are not well understood.


While Allegra D is generally safe and effective for the treatment of allergies and nasal congestion, it is important to be aware of the potential side effects. Common side effects include dry mouth, nausea, headache, dizziness, and insomnia. Less common side effects may include increased heart rate, high blood pressure, restlessness, irritability, and anxiety. Allergic reactions are rare but can be serious. Precautions should be taken before using Allegra D, and it is important to consult a healthcare professional if any concerning symptoms occur.

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