Mirtazapine (Oral Route)

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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:

• 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

• Change in menstrual cycle (periods)
• Convulsions (seizures)
• Decreased sexual ability
• Menstrual pain
• 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:

• Constipation
• Dizziness
• Drowsiness
• Dry mouth
• Increased appetite
• Weight gain

• Abdominal or stomach 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.

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