Claritin Side Effects Center

What Is Claritin?

Claritin (loratadine) is an antihistamine used to treat allergy symptoms. Claritin blocks the action of histamine, a substance in the body that initiates allergic symptoms like itching, sneezing, runny nose, and allergic skin rashes. Claritin is available as a generic drug.

What Are Side Effects of Claritin?

Claritin may cause serious side effects including:

• fast or uneven heart rate,
• severe headache, and
• feeling lightheaded

Get medical help right away, if you have any of the symptoms listed above.

Common side effects of Claritin include:

• headache,
• sleepiness,
• feeling tired,
• drowsiness,
• fatigue,
• nervousness,
• stomach pain,
• diarrhea,
• dry mouth,
• sore throat,
• hoarseness,
• eye redness,
• blurred vision,
• nosebleed, or
• skin rash.

Tell your doctor if you experience serious side effects of Claritin including fast or uneven heart rate, feeling like you might pass out, jaundice (yellowing of your skin or eyes), or seizures (convulsions).

Claritin may cause serious side effects including:

• fast or uneven heart rate,
• severe headache, and
• feeling lightheaded

Get medical help right away, if you have any of the symptoms listed above.

Seek medical care or call 911 at once if you have the following serious side effects:

• Serious eye symptoms such as sudden vision loss, blurred vision, tunnel vision, eye pain or swelling, or seeing halos around lights;
• Serious heart symptoms such as fast, irregular, or pounding heartbeats; fluttering in your chest; shortness of breath; and sudden dizziness, lightheartedness, or passing out;
• Severe headache, confusion, slurred speech, arm or leg weakness, trouble walking, loss of coordination, feeling unsteady, very stiff muscles, high fever, profuse sweating, or tremors.

This document does not contain all possible side effects and others may occur. Check with your physician for additional information about side effects.

Dosage for Claritin

Claritin is available as a 10 mg tablet, a 5 or 10 mg rapidly-disintegrating tablet, a 10 mg chewable tablet, and a syrup (5 mg per 5 ml). Claritin is taken once a day.

What Drugs, Substances, or Supplements Interact with Claritin?

Drug interactions may occur with certain antibiotics, antifungal medications, and acid-reducing drugs. Warnings may apply to individuals who have asthma, kidney disease, or liver disease. People who have phenylketonuria (PKU) should avoid certain brands of orally disintegrating tablets that may contain aspartame.

Claritin During Pregnancy and Breastfeeding

Claritin is generally avoided during pregnancy and nursing. Pregnant women may take Claritin only if it is clearly needed. Nursing mothers should consult their doctor before breastfeeding. Claritin should not be used in children younger than 6 years of age unless directed by a doctor. Chewable tablets should not be used in children younger than 2 years of age unless directed by a pediatric doctor.

Additional Information

Our Claritin Side Effects Drug Center provides a comprehensive view of available drug information on the potential side effects when taking this medication.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

Get emergency medical help if you have signs of an allergic reaction: hives; difficult breathing; swelling of your face, lips, tongue, or throat.

Common side effects may include:

• headache; or
• feeling tired or drowsy.

This is not a complete list of side effects and others may occur. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.