Cold Home > Tavist Side Effects

Coordination problems, indigestion or heartburn, and drowsiness are some of the most common side effects that have been reported with Tavist. In general, the medication's side effects are mild and do not require medical attention in most cases. Certain side effects of Tavist are potentially serious, however, and should be reported to your healthcare provider immediately (including blurred vision, loss of balance, or difficulty urinating).

An Introduction to Tavist Side Effects

As with any medicine, Tavist® Allergy (clemastine fumarate) can cause side effects. However, not everyone who takes the medication will have problems. In fact, most people tolerate it quite well. If side effects do occur, in most cases, they are minor and either require no treatment or can easily be treated by you or your healthcare provider.
(This article covers many, but not all, of the possible side effects with Tavist. Your healthcare provider can discuss a more complete list of Tavist side effects with you.)

Possible Side Effects of Tavist

Tavist is a relatively "old" medication, approved before the United States Food and Drug Administration (FDA) required very detailed side effect information in the prescribing information for medications. This is the case with prescription clemastine products; only vague side effect information (with no specific percentages) was provided. Additionally, the non-prescription clemastine products have almost no information about potential side effects listed on the label (as is standard with non-prescription products).
Based on the limited information from prescription clemastine products, the most common Tavist side effects include:
  • Drowsiness
  • Sedation (a feeling of sleepiness and reduced anxiety)
  • Dizziness
  • Indigestion or heartburn
  • Coordination problems
  • Thickening of bronchial secretions (chest mucus).
Other reported side effects of Tavist or other similar antihistamines include:
  • Fatigue
  • Restlessness, excitation, nervousness, or irritability
  • Shakiness (tremor)
  • Insomnia
  • An unusual, pleasant feeling (euphoria)
  • Sensitivity to the sun
  • Excessive sweating and/or chills
  • Dry mouth, nose, or throat
  • Unusual sensations, such as tingling or numbness
  • A spinning sensation (vertigo)
  • Loss of appetite, nausea, or vomiting
  • Diarrhea or constipation
  • Nasal stuffiness
  • Early menstrual period.
Written by/reviewed by:
Last reviewed by: Kristi Monson, PharmD;
Last updated/reviewed:
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