
Mirtazapine is an antidepressant medication used to treat depression and major depressive disorder. It is available as an oral tablet and comes in immediate-release and orally disintegrating forms. Like all medicines, mirtazapine can cause side effects in some people, although many experience none or only minor ones. Some common side effects include increased appetite, weight gain, drowsiness, and restlessness. More rarely, mirtazapine can cause severe allergic reactions, low sodium levels, and low white blood cell counts. There have also been reports of mirtazapine causing muscle twitching and movement disorders such as akathisia, dystonia, and tremors. This paragraph introduces the topic of whether mirtazapine can cause muscle twitching, providing an overview of the drug's uses, forms, side effects, and relevant adverse reactions.
| Characteristics | Values |
|---|---|
| Muscle twitching | Rare side effect, but some cases have been reported |
| Other side effects | Drowsiness, increased appetite and weight gain, restlessness, agitation, suicidal thoughts or actions, low sodium levels, low white blood cell levels, low blood pressure upon standing, liver damage, weakened immune system, serotonin syndrome, severe skin reactions, severe allergic reactions, rhabdomyolysis |
| Serious side effects | Happen in less than 1 in 10,000 people |
| Movement disorders | Restless legs syndrome, tremors, akathisia, dystonia, dyskinesia, rapid eye movement sleep behavior disorders, periodic limb movement disorder |
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What You'll Learn
- Mirtazapine can cause muscle twitching, but it's not a common side effect
- This medication can cause involuntary movement disorders, including akathisia
- Tremors are a reported side effect of mirtazapine, but they're rare
- Mirtazapine may cause serotonin syndrome, a potentially life-threatening condition
- Low magnesium levels may be a factor in mirtazapine-related muscle twitching

Mirtazapine can cause muscle twitching, but it's not a common side effect
Mirtazapine is an oral medication used to treat depression. Like all medicines, it can cause side effects in some people, but many experience none or only minor ones. Serious side effects are rare, occurring in less than 1 in 10,000 people.
Mirtazapine can cause muscle twitching, but it is not a common side effect. Some people taking mirtazapine have reported developing muscle twitches or fasciculations all over their body. These twitches are not painful and do not happen all the time, but they can be annoying. In one case, a patient taking 7.5 mg of mirtazapine per day developed tremors in both hands after two days. The tremors were diagnosed as subjective and objective signs of akathisia and resting tremors, and the mirtazapine was stopped.
Mirtazapine is associated with movement disorders, including restless legs syndrome, tremors, akathisia, dystonia, dyskinesia, and more. These movement disorders can be challenging to diagnose, as the clinical manifestations can overlap and provide a mixture of disorders in the same individual.
Mirtazapine can also cause other side effects, such as drowsiness, increased appetite and weight gain, and restlessness. In rare cases, it can cause serious allergic reactions, low sodium levels, and liver damage. If you experience any side effects, it is important to consult your doctor or pharmacist.
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This medication can cause involuntary movement disorders, including akathisia
Mirtazapine is an antidepressant medication used to treat depression and major depressive disorder. It is considered to be one of the safest antidepressants in terms of side effects like involuntary movements. However, like all medicines, mirtazapine can cause side effects in some people, although many people have no side effects or only minor ones.
Mirtazapine has been associated with movement disorders, including akathisia. Akathisia is a movement disorder characterised by restlessness and an inability to sit or stand still. It is a rare but well-reported side effect of taking mirtazapine, with a paradoxical reaction occurring in a small number of people. In most cases, akathisia develops within the first few weeks of taking the medication, and symptoms usually improve within a few hours to a few weeks of stopping the medication.
In addition to akathisia, mirtazapine has also been linked to other movement disorders, such as restless legs syndrome, tremors, dystonia, dyskinesia, and periodic limb movement disorder. These movement disorders can be challenging to diagnose, as the clinical manifestations can overlap and vary between individuals.
If you experience any involuntary movements or other side effects while taking mirtazapine, it is important to consult your doctor or healthcare provider. They may recommend adjusting the dosage or switching to an alternative treatment. Serious side effects are rare but can include severe allergic reactions, serotonin syndrome, low sodium levels, and liver damage.
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Tremors are a reported side effect of mirtazapine, but they're rare
Mirtazapine is an antidepressant medication used to treat depression and major depressive disorder. Like all medicines, it can cause side effects in some people, but many experience none or only minor ones. Tremors are a reported side effect of mirtazapine, but they are rare.
Mirtazapine has been shown to alleviate akathisia, a movement disorder that can cause restlessness and involuntary movements. However, in rare cases, mirtazapine itself can induce akathisia, which may manifest as tremors. In one case report, a patient taking 7.5 mg of mirtazapine per day developed restlessness and coarse, low-frequency tremors in both hands after just two days of starting the medication. The patient's symptoms were diagnosed as subjective and objective signs of akathisia, and the mirtazapine was discontinued, leading to a resolution of the tremors within a week.
Another case report describes a 60-year-old female patient who presented with restlessness, easy fatigability, and reduced sleep and appetite, among other symptoms. While this report focuses on mirtazapine-induced tremors, it is unclear whether the patient experienced these tremors before or after starting the medication. Additionally, the report mentions that there is no literature implicating mirtazapine with tremors, which contradicts the previous case report and other sources suggesting a link between mirtazapine and tremors.
It is important to note that mirtazapine is generally considered one of the safest antidepressants in terms of side effects like involuntary movements. While tremors are a reported side effect, they are not systematically reported, and their occurrence is uncommon. Serious side effects of mirtazapine are rare, affecting less than 1 in 10,000 people. However, it is always advisable to consult a healthcare professional if you experience any adverse effects while taking this or any other medication.
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Mirtazapine may cause serotonin syndrome, a potentially life-threatening condition
Mirtazapine is an atypical tetracyclic antidepressant used primarily to treat depression. It is also used in cases of depression complicated by anxiety or insomnia. While mirtazapine is generally considered safe, it can cause side effects in some people, and in rare cases, serious adverse reactions may occur.
One potential serious side effect of mirtazapine is serotonin syndrome (SS). Serotonin syndrome is a potentially life-threatening condition caused by excessive levels of serotonin, a chemical in the body. Mirtazapine can increase the risk of serotonin syndrome when taken alone or in combination with other medications that affect serotonin levels. However, it is important to note that reports of serotonin syndrome associated with mirtazapine alone are extremely rare or non-existent. The risk of serotonin syndrome is higher when mirtazapine is combined with certain other drugs, particularly serotonergic drugs like selective serotonin reuptake inhibitors (SSRIs) and other antidepressants.
The symptoms of serotonin syndrome can vary in severity, ranging from mild to severe. Mild symptoms may include agitation, confusion, and increased muscle tone, while severe symptoms may include high fever, severe rigidity, and seizures. In the case of severe serotonin syndrome, patients may require sedation, paralysis, and intubation. Therefore, it is crucial to seek immediate medical attention if you experience any symptoms indicative of serotonin syndrome.
The risk of developing serotonin syndrome while taking mirtazapine can be mitigated by being aware of potential drug interactions. It is important to inform your healthcare provider about all the medications you are taking, including any over-the-counter drugs or supplements, to ensure that they do not interact negatively with mirtazapine. Additionally, caution should be exercised when combining mirtazapine with certain types of drugs, such as SSRIs, CYP2D6 inhibitors, or CYP3A4 inhibitors. In some cases, adjusting the dosage or gradually introducing mirtazapine may be recommended to minimize the risk of serotonin syndrome.
While mirtazapine may be associated with serotonin syndrome in rare cases, it is important to remember that not all side effects are cause for alarm. Many people experience no side effects or only minor ones, such as increased appetite and weight gain. However, if you experience any unusual symptoms or have concerns about potential side effects, it is always best to consult your healthcare provider for personalized advice and guidance.
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Low magnesium levels may be a factor in mirtazapine-related muscle twitching
Mirtazapine is an oral medication used to treat depression and major depressive disorder. It is considered one of the safest antidepressants in terms of side effects. However, like all medicines, it can cause side effects in some people, although many people have no side effects or only minor ones.
Mirtazapine has been associated with movement disorders, including muscle twitching, restless legs syndrome, tremors, akathisia, dystonia, dyskinesia, and periodic limb movement disorder. While muscle twitching is not a common side effect, some people taking mirtazapine have reported experiencing it.
Additionally, low sodium levels in the blood (hyponatremia) have been linked to muscle cramps and may also be a contributing factor to muscle twitching in individuals taking mirtazapine. Older adults and those taking diuretics are at a higher risk of developing hyponatremia while on mirtazapine. It is important to monitor sodium levels and consult a healthcare provider if symptoms of low sodium, such as muscle cramps, occur.
While muscle twitching may be a side effect of mirtazapine for some individuals, it is important to note that it is not a common occurrence. Other potential side effects of mirtazapine include drowsiness, increased appetite and weight gain, restlessness, agitation, and allergic reactions. Serious side effects are rare and occur in less than 1 in 10,000 people. If any side effects become severe or persistent, it is recommended to consult a healthcare professional.
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Frequently asked questions
Mirtazapine has been associated with movement disorders, including muscle twitching.
Mirtazapine has been associated with several other side effects, including drowsiness, restlessness, agitation, increased appetite, weight gain, low blood pressure, and suicidal thoughts or actions.
Serious side effects of mirtazapine are rare, occurring in less than 1 in 10,000 people. Some rare side effects include severe allergic reactions, serotonin syndrome, and liver damage.
If you experience muscle twitching or other side effects while taking mirtazapine, consult your doctor or pharmacist. They can provide guidance and advice based on your individual situation.
Yes, there are alternative treatments for depression that do not involve mirtazapine. It is important to discuss your concerns and treatment options with your doctor.

















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