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Meclizine HCL side effects

Updated February 12, 2018

Meclizine hydrochloride is an antihistamine available in prescription and over-the-counter forms. Brands include Antivert and Dramamine, and people can buy it generically as well. It is used to treat and prevent dizziness and nausea associated with motion sickness. Numerous side effects are possible.

More Common Side Effects

Meclizine HCl, like other antihistamines, can cause blurred vision, drowsiness, dry mouth, fatigue, headaches, nervousness, sore throat and thickening of bronchial mucus.

Gastrointestinal Side Effects

Possible gastrointestinal side effects include abdominal pain, diarrhoea, increased appetite, weight gain, and worsening of gastro-oseophageal reflux disease and stomach ulcers.

Rare Side Effects

Serious side effects are rare, and more common in young children and elderly people. They include heart palpitations, irregular heartbeat, rapid heartbeat, confusion, difficulty urinating, seizures and worsening of glaucoma.

Allergic Reaction

Rarely, some people can have an allergic reaction to meclizine HCl. Signs are rash or hives, itching, swelling of the throat or mouth, wheezing and difficulty breathing.

Drug Interactions

Meclizine HCl may interact with alcohol, certain high blood pressure medications, anticholinergic drugs, antipsychotic medications, anti-anxiety medications, antidepressants, muscle relaxants, narcotic pain relievers and sleep medications.

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About the Author

Shelley Moore is a journalist and award-winning short-story writer. She specializes in writing about personal development, health, careers and personal finance. Moore has been published in "Family Circle" magazine and the "Milwaukee Sentinel" newspaper, along with numerous other national and regional magazines, daily and weekly newspapers and corporate publications. She has a Bachelor of Science in psychology.