
Cymbalta (Duloxetine) is a prescription medicine used to treat symptoms of major depressive disorder, anxiety, diabetic peripheral neuropathic pain, fibromyalgia, and chronic muscle pain. It is also used for pain caused by nerve damage associated with diabetes. Cymbalta is known to have several side effects, and muscle spasms are one of them. Muscle spasms are involuntary contractions of muscles, and they can be caused by Cymbalta usage. This is a common side effect, occurring in 1% to 10% of patients. It is important to consult a doctor if you experience any side effects, as they can advise on adjusting the dosage or provide alternative treatments.
| Characteristics | Values |
|---|---|
| Muscle spasms | Common side effect (1-10%) |
| Muscle contraction | Prolonged muscle contraction is a characteristic of acute dystonia, which has been induced by duloxetine in some cases |
| Muscle pain | Common side effect (1-10%) |
| Muscle stiffness | Uncommon side effect (0.1-1%) |
| Muscle twitching | Uncommon side effect (0.1-1%) |
| Muscle jerks | More subtle effect experienced by a larger number of people |
| Muscle tightness | Uncommon side effect (0.1-1%) |
| Muscle weakness | Seek medical care or call emergency services if you experience arm or leg weakness |
| Muscle soreness | Seek medical advice if you experience muscle soreness or pain |
| Muscle tremors | Seek medical care or call emergency services if you experience tremors |
| Muscle movement | Uncontrolled movements may be a side effect |
| Muscle relaxation | May interact with muscle relaxers |
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What You'll Learn

Cymbalta is used to treat depression, anxiety, and pain syndromes
Cymbalta (duloxetine) is a drug used to treat depression, anxiety, and pain syndromes. It is available via prescription in capsule form and belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). These medicines are thought to work by increasing the activity of chemicals called serotonin and norepinephrine in the brain.
Cymbalta is commonly used to treat major depressive disorder in adults, as well as general anxiety disorder in adults and children aged 7 and older. It is also used to treat nerve pain caused by diabetes (diabetic neuropathy), chronic muscle or joint pain, and fibromyalgia (a chronic pain disorder) in adults and children aged 13 and older.
Cymbalta has been found to be effective in treating depression and anxiety, with the added benefit of addressing pain caused by nerve damage associated with diabetes (diabetic peripheral neuropathy). This pain can manifest as tingling, numbness, burning, or pain, usually in the legs and feet. Cymbalta is also useful in treating fibromyalgia, which is characterised by muscle pain and stiffness, sleep problems, fatigue, and chronic pain in muscles and bones.
While Cymbalta can be an effective treatment for these conditions, it is important to be aware of its potential side effects. The most commonly reported side effects include nausea, somnolence, headache, and dizziness. Other side effects may include muscle cramp, muscle spasms, musculoskeletal pain, myalgia, neck pain, and insomnia. In rare cases, Cymbalta has been associated with acute dystonia, characterised by prolonged muscle contraction, neck spasms, and jaw clenching. It is important to consult a doctor before taking Cymbalta, as they will advise on the benefits and risks of the medication for your specific circumstances.
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Muscle spasms are a common side effect of Cymbalta
Duloxetine belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). These medicines are thought to work by increasing the activity of chemicals called serotonin and norepinephrine in the brain. While Cymbalta can be effective in treating depression and anxiety, it is important to be aware of its potential side effects, which can vary from person to person.
Muscle spasms, or acute dystonia, are one of the more commonly reported side effects of Cymbalta. Dystonia is characterised by prolonged muscle contraction and can present with neck spasms, jaw clenching, and tremors in the hands and lips. It is believed that dystonia results from an abnormality in the basal ganglia, but the exact pathophysiology is not yet fully understood. However, it is thought that the interconnection between the serotonergic and dopaminergic systems plays a major role in dystonia.
In addition to muscle spasms, Cymbalta may cause other side effects such as nausea, somnolence, headache, dizziness, dry mouth, constipation, and vomiting. More serious side effects may include blurred vision, sudden vision loss, eye pain, fast or irregular heartbeat, shortness of breath, high fever, seizures, and suicidal thoughts or behaviour. It is important to consult a doctor if you experience any of these side effects while taking Cymbalta.
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Acute dystonia is a rare but serious side effect
Cymbalta (duloxetine) is a prescription medicine used to treat symptoms of major depressive disorder, anxiety, diabetic peripheral neuropathic pain, fibromyalgia, and chronic muscle pain. It belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). These medicines work by increasing the activity of chemicals called serotonin and norepinephrine in the brain.
While Cymbalta can be an effective treatment for many people, it is important to be aware of its potential side effects. One rare but serious side effect is acute dystonia, which is characterised by prolonged muscle contraction and can manifest as neck and head spasms, jaw clenching, and tremors in the hands and lips. This side effect is believed to be related to the impairment of the normal dopaminergic-noradrenergic balance, which can result from the use of antidepressant agents like duloxetine.
Acute dystonia is a rare but potentially life-threatening side effect of Cymbalta. It is characterised by painful and terrifying symptoms that require early detection and management. Clinicians should be aware of the potential for extrapyramidal symptoms (EPS) with all classes of antidepressant agents, including Cymbalta. In one case report, a patient experienced a severe neck spasm, dystonic distortion of the neck, and mild tremors in her hands and lips after taking a single dose of 30 mg of duloxetine.
The pathophysiology of acute dystonia is not yet fully understood, but it is believed to result from an abnormality of the basal ganglia. The interconnection between the serotonergic and dopaminergic systems is thought to play a major role in the development of dystonia. As Cymbalta strongly inhibits the reuptake of serotonin and norepinephrine, it can increase serotonin transmission and subsequently inhibit dopaminergic neurotransmission. This impairment of the normal balance between dopamine and norepinephrine can lead to the development of dystonia.
If you experience any symptoms of acute dystonia or other side effects while taking Cymbalta, it is important to consult your healthcare provider immediately. Do not stop taking Cymbalta without first seeking medical advice, as sudden discontinuation can lead to withdrawal symptoms such as dizziness, nausea, headaches, and increased sweating.
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Cymbalta may cause seizures in rare cases
Cymbalta is a prescription drug used to treat anxiety, depression, and pain from diabetic neuropathy, among other conditions. It belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). While Cymbalta can be effective for managing these conditions, it is important to be aware of its potential side effects, one of which is seizures.
Seizures are listed as a rare but serious side effect of Cymbalta, occurring in approximately 3 out of every 10,500 patients. This translates to a frequency of 0.03% of patients, which is considered a rare occurrence. People who already have a seizure disorder or a history of seizures may be at an increased risk of experiencing a seizure while taking Cymbalta. Therefore, it is crucial to inform your doctor about any such pre-existing conditions before starting the medication.
Additionally, there have been reports of withdrawal seizures when Cymbalta is abruptly discontinued. In one case, a patient experienced generalized tonic-clonic seizures after suddenly stopping their use of Cymbalta. This highlights the importance of gradually tapering off the medication under medical supervision to minimize the risk of withdrawal symptoms.
While rare, the potential for Cymbalta to induce seizures underscores the necessity of careful patient monitoring and individualized risk-benefit assessments. It is always advisable to consult a healthcare provider to determine if Cymbalta is suitable for your specific circumstances, weighing the benefits against the potential risks.
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Cymbalta may affect blood sugar levels
Cymbalta (Duloxetine) is a prescription medicine used to treat symptoms of major depressive disorder, anxiety, diabetic peripheral neuropathic pain, fibromyalgia, and chronic muscle pain. It belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). These medicines are thought to work by increasing the activity of chemicals called serotonin and norepinephrine in the brain.
It is important to note that Cymbalta may have side effects, and these can vary depending on the individual. Some common side effects include nausea, somnolence, headache, dizziness, dry mouth, and vomiting. Cymbalta may also cause muscle spasms, which are characterized by prolonged muscle contractions and can be painful.
If you experience any side effects, it is important to consult your healthcare provider. They will be able to advise you on the benefits and risks of continuing or discontinuing the medication.
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Frequently asked questions
Yes, muscle spasms are a common side effect of Cymbalta, occurring in 1-10% of patients.
Cymbalta has a range of possible side effects, including nausea, somnolence, headache, dizziness, dry mouth, constipation, and vomiting. It can also cause serious side effects such as blurred vision, confusion, slurred speech, and seizures.
Yes, Cymbalta may increase the risk of suicidal thoughts and behavior, particularly in people under 25. It can also cause or worsen glaucoma, which can lead to blindness. Other risks include low blood pressure upon standing and falls, liver damage, and serotonin syndrome.
Cymbalta belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SSNRIs). These work by increasing the activity of serotonin and norepinephrine in the brain.
No, do not stop taking Cymbalta suddenly without first checking with your doctor. They will advise you on how to slowly decrease the dose to reduce the risk of withdrawal symptoms such as dizziness, nausea, headaches, and increased sweating.











































