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Side Effects of Mirtazapine

Dizziness, weakness, and weight gain are among the most commonly reported mirtazapine side effects. Most people, however, have no problems. If side effects occur, they are often mild and easily treated. However, if you experience potentially serious side effects, such as suicidal thoughts, hallucinations, or signs of an allergic reaction, report them immediately to your healthcare provider.

Side Effects of Mirtazapine: An Introduction

As with any medicine, side effects are possible with mirtazapine (Remeron®). However, not everyone who takes the drug will experience 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 be easily treated by you or your healthcare provider.
 
(This article covers many, but not all, of the possible side effects with mirtazapine. Your healthcare provider can discuss a more complete list of mirtazapine side effects with you.)
 

Serious Mirtazapine Side Effects

Some side effects of mirtazapine are potentially serious and should be reported to your healthcare provider. These include but are not limited to:
 
  • Suicidal thoughts or behavior (see Remeron and Suicide)
  • High blood pressure (hypertension) or low blood pressure (hypotension)
  • Anxiety, agitation, or panic attacks
  • Hostility or aggressiveness
  • Engaging in unusual or dangerous activities
  • Restlessness or inability to sit still
  • Extreme elation or feelings of happiness that may switch back and forth with a depressed or sad mood
  • Other unusual changes in behavior
  • Hallucinations
  • A fast heart rate
  • Chest palpitations (feelings of a rapidly or forcefully beating heart)
  • Difficulty sleeping
  • A sore throat, fever, or other signs of an infection
  • Signs of serotonin syndrome, such as:
  •  
    • Confusion or other mental changes
    • A rapid heart rate
    • Nausea
    • Vomiting
    • Diarrhea
    • Hallucinations
    • Blood pressure changes
    • Overactive reflexes
    • Fever
    • Shivering
    • Shakiness
    • Agitation
    • Sweating
    • Seizures
    • Coma
  
  • Signs of an allergic reaction, such as:
 
    • An unexplained rash
    • Hives
    • Itching
    • Unexplained swelling
    • Wheezing
    • Difficulty breathing or swallowing.
 
 
Quick Tips to Reduce Stress

Mirtazapine (Remeron)

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