Mirtazapine (Oral Route)

Mayo Clinic Health Manager

Get free personalized health guidance for you and your family.

Get Started

Free

E-Newsletter

Subscribe to receive the latest updates on health topics. About our newsletters

  • Housecall
  • Alzheimer's caregiving
  • Living with cancer

Side Effects

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

Less common
  • Decreased or increased movement
  • Mood or mental changes, including abnormal thinking, agitation, anxiety, confusion, and feelings of not caring
  • Shortness of breath
  • Skin rash
  • Swelling
Rare
  • Convulsions (seizures)
  • Decreased sexual ability
  • Menstrual pain
  • Missing periods
  • Mood or mental changes, including anger, feelings of being outside the body, hallucinations (seeing, hearing, or feeling things that are not there), mood swings, and unusual excitement
  • Mouth sores
  • Sore throat, chills, or fever

Some side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. Also, your health care professional may be able to tell you about ways to prevent or reduce some of these side effects. Check with your health care professional if any of the following side effects continue or are bothersome or if you have any questions about them:

More common
  • Constipation
  • Dizziness
  • Drowsiness
  • Dryness of mouth
  • Increased appetite
  • Weight gain
Less common
  • Abdominal pain
  • Abnormal dreams
  • Back pain
  • Dizziness or fainting when getting up suddenly from a lying or sitting position
  • Increased need to urinate
  • Increased sensitivity to touch
  • Increased thirst
  • Low blood pressure
  • Muscle pain
  • Nausea
  • Sense of constant movement of self or surroundings
  • Trembling or shaking
  • Vomiting
  • Weakness

Other side effects not listed may also occur in some patients. If you notice any other effects, check with your healthcare professional.

Call your doctor for medical advice about side effects. You may report side effects to the FDA at 1-800-FDA-1088.

Precautions

DR601601

Portions of this document last updated:

Nov. 1, 2009

Source: Drug Information provided by: Micromedex

Copyright © 2009 Thomson Healthcare Inc. All rights reserved. Information is for End User's use only and may not be sold, redistributed or otherwise used for commercial purposes.


Text Size: smaller largerlarger