Clarinex Syrup

Generic Name: Desloratadine (DES-lor-A-ta-deen)Brand Name: Clarinex

Clarinex Syrup is used for:

Treating allergies and chronic hives. It may also be used for other conditions as determined by your doctor.

Clarinex Syrup is an antihistamine. It works by blocking the effects of histamine, which causes allergy symptoms such as sneezing, runny nose, and itchy/watery eyes.

Do NOT use Clarinex Syrup if:

  • you are allergic to any ingredient in Clarinex Syrup or to loratadine

Contact your doctor or health care provider right away if any of these apply to you.

Before using Clarinex Syrup:

Some medical conditions may interact with Clarinex Syrup. Tell your doctor or pharmacist if you have any medical conditions, especially if any of the following apply to you:

  • if you are pregnant, planning to become pregnant, or are breast-feeding
  • if you are taking any prescription or nonprescription medicine, herbal preparation, or dietary supplement
  • if you have allergies to medicines, foods, or other substances
  • if you have kidney or liver problems

Some MEDICINES MAY INTERACT with Clarinex Syrup. However, no specific interactions with Clarinex Syrup are known at this time.

Ask your health care provider if Clarinex Syrup may interact with other medicines that you take. Check with your health care provider before you start, stop, or change the dose of any medicine.

How to use Clarinex Syrup:

Use Clarinex Syrup as directed by your doctor. Check the label on the medicine for exact dosing instructions.

  • Take Clarinex Syrup by mouth with or without food.
  • Use a measuring device marked for medicine dosing. Ask your pharmacist for help if you are unsure of how to measure this dose.
  • If you miss a dose of Clarinex Syrup and you are taking it regularly, take it as soon as possible. If several hours have passed or if it is nearing time for the next dose, do not double the dose to catch up, unless advised by your health care provider. Do not take 2 doses at once.

Ask your health care provider any questions you may have about how to use Clarinex Syrup.

Important safety information:

  • Clarinex Syrup may cause dizziness. This effect may be worse if you take it with alcohol or certain medicines. Use Clarinex Syrup with caution. Do not drive or perform other possibly unsafe tasks until you know how you react to it.
  • Clarinex Syrup should not be used in CHILDREN younger than 6 months old; safety and effectiveness in these children have not been confirmed.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, contact your doctor. You will need to discuss the benefits and risks of using Clarinex Syrup while you are pregnant. Clarinex Syrup is found in breast milk. Do not breast-feed while taking Clarinex Syrup.

Possible side effects of Clarinex Syrup:

All medicines may cause side effects, but many people have no, or minor, side effects. Check with your doctor if any of these most COMMON side effects persist or become bothersome:

Cough; diarrhea; dizziness; increased or decreased appetite; mood changes; nausea; nosebleed; sore throat; trouble sleeping; vomiting.

Seek medical attention right away if any of these SEVERE side effects occur:

Severe allergic reactions (rash; hives; itching; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); dark urine; ear pain or discharge; fast or irregular heartbeat; fever; pale stools; seizures; severe or persistent cough; severe or persistent nosebleed; yellowing of the skin or eyes.

This is not a complete list of all side effects that may occur. If you have questions about side effects, contact your health care provider. Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088. You may also report side effects at

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center (, or emergency room immediately. Symptoms may include confusion; difficulty breathing; drowsiness; fast heartbeat; hallucinations; inability to sleep; loss of consciousness; tremor.

Proper storage of Clarinex Syrup:

Store Clarinex Syrup at room temperature, between 59 and 86 degrees F (15 and 30 degrees C), in a tightly closed container. Store away from heat, moisture, and light. Do not store in the bathroom. Keep Clarinex Syrup out of the reach of children and away from pets.

General information:

  • If you have any questions about Clarinex Syrup, please talk with your doctor, pharmacist, or other health care provider.
  • Clarinex Syrup is to be used only by the patient for whom it is prescribed. Do not share it with other people.
  • If your symptoms do not improve or if they become worse, check with your doctor.

This information is a summary only. It does not contain all information about Clarinex Syrup. If you have questions about the medicine you are taking or would like more information, check with your doctor, pharmacist, or other health care provider.

  • Clarinex Prescribing Information (FDA)
  • Clarinex Consumer Overview
  • Clarinex Detailed Consumer Information (PDR)
  • Clarinex Advanced Consumer (Micromedex) - Includes Dosage Information
  • Desloratadine Professional Patient Advice (Wolters Kluwer)