December 1, 2015
Recommended Topic Related To:

Clemastine Fumarate Tablets

"By Matt McMillen
WebMD Health News
Reviewed by Brunilda Nazario, MD

April 9, 2015 -- Spring is finally here, and with it comes tree pollen. For people with allergies, that could spell misery. But despite the hars"...

Clemastine Fumarate Tablets

Side Effects


Transient drowsiness, the most common adverse reaction associated with clemastine fumarate, occurs relatively frequently and may require discontinuation of therapy in some instances.

Antihistaminic Compounds: It should be noted that the following reactions have occurred with one or more antihistamines and, therefore, should be kept in mind when prescribing drugs belonging to this class, including clemastine fumarate.

The most frequent adverse reactions are underlined.

  1. General: Urticaria, drug rash, anaphylactic shock, photosensitivity, excessive perspiration, chills, dryness of mouth, nose, and throat.
  2. Cardiovascular System: Hypotension, headache, palpitations, tachy-cardia, extrasystoles.
  3. Hematologic System: Hemolytic anemia, thrombocytopenia, agranulocytosis.
  4. Nervous System: Sedation, sleepiness, dizziness, disturbed coordination, fatigue, confusion, restlessness, excitation, nervousness, tremor, irritability, insomnia, euphoria, paresthesias, blurred vision, diplopia, vertigo, tinnitus, acute labyrinthitis, hysteria, neuritis, convulsions.
  5. GI System: Epigastric distress, anorexia, nausea, vomiting, diarrhea, constipation.
  6. GU System: Urinary frequency, difficult urination, urinary retention, early menses.
  7. Respiratory System: Thickening of bronchial secretions, tightness of chest and wheezing, nasal stuffiness.

Read the Clemastine Fumarate Tablets (clemastine fumarate tablets) Side Effects Center for a complete guide to possible side effects


MAO inhibitors prolong and intensify the anticholiner-gic (drying) effects of antihistamines.

This monograph has been modified to include the generic and brand name in many instances.

Last reviewed on RxList: 8/11/2008

Side Effects

Report Problems to the Food and Drug Administration


You are encouraged to report negative side effects of prescription drugs to the FDA. Visit the FDA MedWatch website or call 1-800-FDA-1088.

Allergies & Asthma

Improve treatments & prevent attacks.

Health Resources
Use Pill Finder Find it Now See Interactions

Pill Identifier on RxList

  • quick, easy,
    pill identification

Find a Local Pharmacy

  • including 24 hour, pharmacies

Interaction Checker

  • Check potential drug interactions
Search the Medical Dictionary for Health Definitions & Medical Abbreviations