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All about: Clemastine Syrup

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Generic Name: Clemastine Syrup (KLEM-ass-teen)
Brand Name: Generic only. No brands available.

Clemastine Syrup is used for:

Preventing or treating symptoms of hay fever and other upper respiratory allergies or the common cold, such as runny nose, sneezing, itching of the nose and throat, and itchy, watery eyes, and relieving cough. It may also be used for other conditions as determined by your doctor.

Clemastine Syrup is an antihistamine. It works by blocking the action of histamine, reducing the symptoms of an allergic reaction.

Do NOT use Clemastine Syrup if:

  • you are allergic to any ingredient in Clemastine Syrup or other similar medicines
  • you are taking sodium oxybate (GHB)
  • you are currently taking or have taken a monoamine oxidase (MAO) inhibitor (eg, phenelzine) in the past 14 days
  • you are breast-feeding

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

Before using Clemastine Syrup:

Some medical conditions may interact with Clemastine 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 asthma, chronic obstructive pulmonary disease (COPD), chronic bronchitis, emphysema, lung disease, shortness of breath, or sleep apnea
  • if you have blockage of the stomach, intestine, or urinary tract; difficulty urinating; diabetes; ulcers; enlargement of the prostate; glaucoma; heart disease; high blood pressure; porphyria; or thyroid disease

Some MEDICINES MAY INTERACT with Clemastine Syrup. Tell your health care provider if you are taking any other medicines, especially any of the following:

  • Sodium oxybate (GHB) because an increase in sleep duration and a decrease in the ability to breathe are likely to occur
  • MAO inhibitors (eg, phenelzine) because they can cause serious, sometimes fatal, reactions

This may not be a complete list of all interactions that may occur. Ask your health care provider if Clemastine 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 Clemastine Syrup:

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

  • Clemastine Syrup may be taken with or without food.
  • Use Clemastine Syrup exactly as directed on the package, unless instructed differently by your doctor. If you are taking Clemastine Syrup without a prescription, follow any warnings and precautions on the label.
  • Use a measuring device marked for medicine dosing. Ask your pharmacist for help if you are unsure of how to measure your dose.
  • If you miss a dose of Clemastine Syrup and you are taking it regularly, take it as soon as possible. If it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not take 2 doses at once.

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

Important safety information:

  • Clemastine Syrup may cause drowsiness or dizziness. Do not drive, operate machinery, or do anything else that could be dangerous until you know how you react to Clemastine Syrup. Using Clemastine Syrup alone, with certain other medicines, or with alcohol may lessen your ability to drive or perform other potentially dangerous tasks.
  • Avoid drinking alcohol or taking other medications that cause drowsiness (eg, sedatives, tranquilizers) while taking Clemastine Syrup. Clemastine Syrup will add to the effects of alcohol and other depressants. Ask your pharmacist if you have questions about which medicines are depressants.
  • Clemastine Syrup may cause dizziness. Alcohol, hot weather, exercise, and fever can increase this effect. To prevent it, sit up or stand slowly, especially in the morning. Also, sit or lie down at the first sign of dizziness.
  • Do not become overheated in hot weather or during exercise or other activities since heatstroke may occur.
  • Do not use Clemastine Syrup with any other medicine that contains clemastine. Before you begin taking any new prescription or over-the-counter medicine, including one used on the skin, read the ingredients to see if it also contains clemastine. If it does, or if you are uncertain if it does, contact your doctor or pharmacist.
  • Do not use Clemastine Syrup for persistent or chronic cough, such as that occurs with smoking, asthma, or emphysema, or if the cough is accompanied by excessive mucus, unless directed by a health care provider.
  • If you are using Clemastine Syrup for cough, cold, or allergy symptoms, stop use and contact your doctor if your symptoms do not improve within 7 days or are accompanied by fever.
  • Use Clemastine Syrup with caution in the ELDERLY because they may be more sensitive to its effects, especially dizziness, sedation, and lightheadedness upon standing.
  • Use Clemastine Syrup with extreme caution in CHILDREN. Talk to your doctor or pharmacist if you have any questions about the brand you are using.
  • PREGNANCY and BREAST-FEEDING: If you become pregnant, discuss with your doctor the benefits and risks of using Clemastine Syrup during pregnancy. Clemastine Syrup is excreted in breast milk. Do not breast-feed while taking Clemastine Syrup.

Possible side effects of Clemastine 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:

Dizziness; drowsiness; dry mouth, throat, and nose; excitability; thickening of mucus in nose or throat.

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

Severe allergic reactions (rash; hives; difficulty breathing; tightness in the chest; swelling of the mouth, face, lips, or tongue); convulsions; fast heartbeat or pounding in the chest; decreased alertness; hallucinations; tremor; wheezing.

This is not a complete list of all side effects that may occur. If you have questions or need medical advice about side effects, contact your doctor or health care provider. You may report side effects to the FDA at 1-800-FDA-1088 (1-800-332-1088) or at http://www.fda.gov/medwatch.

If OVERDOSE is suspected:

Contact 1-800-222-1222 (the American Association of Poison Control Centers), your local poison control center (http://www.aapcc.org/findyour.htm), or emergency room immediately. Symptoms may include coma; excitement; hallucinations; loss of consciousness; muscle twitching; seizures; tremor; weakness.

Proper storage of Clemastine Syrup:

Store Clemastine Syrup at room temperature, between 68 and 77 degrees F (20 and 25 degrees C), or according to directions on the package label. Store in the original package or container. Store away from heat, moisture, and light. Do not store in the bathroom. Keep Clemastine Syrup out of the reach of children and away from pets.

General information:

  • If you have any questions about Clemastine Syrup, please talk with your doctor, pharmacist, or other health care provider.
  • Clemastine 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 Clemastine 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.

Issue Date: September 5, 2007
Database Edition 07.3.1.003
Copyright © 2007 Wolters Kluwer Health, Inc.

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