clemastine (generic name)

It is used to treat the symptoms of allergies and mild allergic reactions
(KLEM as teen)
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What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:
  • allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue
  • changes in vision
  • confused, agitated, nervous
  • fast, irregular heartbeat
  • low blood pressure
  • seizures
  • tremor
  • trouble breathing
  • trouble passing urine
  • uncoordinated
  • unusually weak or tired

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

  • constipation, diarrhea
  • drowsy, tired
  • dry mouth, nose, throat
  • headache
  • loss of appetite
  • stomach upset, vomiting
  • thick mucous
  • unusual sweating

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature, between 15 and 25 degrees C (59 and 77 degrees F). Keep away from heat and light. Throw away any unused medicine after the expiration date.

Remember, keep this and all other medicines out of the reach of children, never share your medicines with others, and use this medication only for the indication prescribed.

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Last Updated: March 23, 2009
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