
Cymbalta (duloxetine) is a medication that treats depression, anxiety, fibromyalgia, and certain types of chronic pain. It is also used to treat nerve damage associated with diabetes (diabetic peripheral neuropathy). Like all medicines, Cymbalta can cause side effects in some people, including nausea, dry mouth, and dizziness. In rare cases, it can also cause involuntary muscle movements, such as muscle twitching, jerking, spasms, tremors, or other uncontrolled movements. These side effects may be temporary and usually occur when you first start the medication or when the dosage is increased. If you experience any side effects that bother you or become severe, it is important to consult your doctor or pharmacist.
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What You'll Learn
- Duloxetine may cause low sodium levels, leading to muscle cramps
- Cymbalta can cause serotonin syndrome, resulting in muscle stiffness and twitching
- Potential allergic reactions include swelling of the face, lips, tongue, and throat
- Cymbalta may cause low blood pressure when standing, leading to dizziness and fainting
- Other side effects include nausea, dry mouth, and drowsiness

Duloxetine may cause low sodium levels, leading to muscle cramps
Duloxetine, sold under the brand name Cymbalta, is a medication used to treat depression, anxiety, fibromyalgia, diabetic neuropathy, and certain types of chronic pain. It belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SNRIs) or serotonin-norepinephrine reuptake inhibitors (SSRIs). These chemicals in the brain help regulate mood and pain.
As with any medication, duloxetine can cause side effects, and most commonly, these include nausea, dry mouth, constipation, vomiting, abdominal pain, and diarrhea. Some less common side effects include muscle pain, joint pain, and muscle cramps.
More seriously, duloxetine may cause low sodium levels in the blood (hyponatremia), which can lead to muscle cramps. Low sodium levels can also cause other symptoms such as confusion, weakness, and constant headaches. If you experience any of these symptoms, it is important to consult your healthcare provider right away, as stopping the medication suddenly can lead to withdrawal symptoms.
It is important to note that side effects from duloxetine may vary depending on the individual, and most people experience no side effects or only minor ones. However, if you are experiencing bothersome side effects, it is always best to consult your doctor or pharmacist to discuss ways to manage them or alternative treatment options.
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Cymbalta can cause serotonin syndrome, resulting in muscle stiffness and twitching
Cymbalta (duloxetine) is a medication that treats depression, anxiety, fibromyalgia, and certain types of chronic pain such as nerve, bone, or joint pain. It is a selective serotonin and norepinephrine reuptake inhibitor (SSNRI) that increases serotonin and norepinephrine levels in the brain. These are hormones that regulate mood and pain.
Cymbalta can cause serotonin syndrome, a condition characterized by an excess of serotonin in the body. Serotonin syndrome can be life-threatening and may occur when Cymbalta is taken alone or in combination with other serotonergic medications. Symptoms of serotonin syndrome include irritability, confusion, fast or irregular heartbeat, muscle stiffness, twitching muscles, sweating, high fever, seizures, chills, vomiting, and diarrhea. It is important to seek medical attention if you experience any of these symptoms while taking Cymbalta.
The risk of developing serotonin syndrome may be increased when Cymbalta is taken with other medications that affect serotonin levels. Therefore, it is important to inform your healthcare provider about all the medications you are currently taking, including prescription drugs, over-the-counter medicines, vitamins, minerals, herbal products, and supplements. This will enable your healthcare provider to assess your risk for serotonin syndrome and make any necessary adjustments to your treatment plan.
In addition to serotonin syndrome, Cymbalta may also cause other side effects, such as dry mouth, nausea, sexual side effects, dizziness, and headaches. These side effects are typically mild and may improve as your body adjusts to the medication. However, if the side effects persist, become bothersome, or worsen, it is important to consult your doctor or pharmacist. They can provide guidance on managing side effects and discuss alternative treatment options if necessary.
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Potential allergic reactions include swelling of the face, lips, tongue, and throat
Cymbalta (duloxetine) is a medication used to treat depression, anxiety, fibromyalgia, diabetic neuropathy, and certain types of chronic pain. It belongs to a group of medicines known as selective serotonin and norepinephrine reuptake inhibitors (SNRIs). These medications work by increasing the levels of serotonin and norepinephrine, the hormones that regulate mood and pain, in the brain.
Like all medicines, Cymbalta can cause side effects in some individuals. However, most people experience no side effects or only minor ones. The common side effects of Cymbalta include nausea, dry mouth, vomiting, abdominal pain, diarrhoea, dizziness, drowsiness, and headaches. These side effects often improve as your body adjusts to the medication.
While rare, Cymbalta may also cause serious side effects, including allergic reactions. Potential allergic reactions include swelling of the face, lips, tongue, and throat. If you experience any of these symptoms, it is crucial to stop taking Cymbalta and seek immediate medical attention. Other severe allergic reaction symptoms include breathing difficulties, such as wheezing, choking, or gasping for air, and a tight feeling in the throat.
In addition to allergic reactions, Cymbalta may also cause serotonin syndrome, seizures, low sodium levels, changes in mental condition, and increased eye pressure leading to glaucoma. It is important to be vigilant about these potential side effects and consult your healthcare provider if any symptoms arise.
It is always advisable to consult your healthcare provider before starting or stopping any medication, including Cymbalta. They can provide personalised advice, monitor your blood pressure, and help manage any side effects that may occur.
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Cymbalta may cause low blood pressure when standing, leading to dizziness and fainting
Cymbalta (duloxetine) is a medication used to treat depression, anxiety, fibromyalgia, diabetic neuropathy, and certain types of chronic pain. It belongs to a class of drugs known as selective serotonin and norepinephrine reuptake inhibitors (SNRIs), which work by increasing the levels of these mood-regulating hormones in the brain.
Like all medications, Cymbalta can cause side effects in some individuals, although most people experience none or only minor ones. One potential side effect of Cymbalta is orthostatic hypotension, or low blood pressure upon standing. This can lead to dizziness, lightheadedness, and even fainting or falls. Falls can result in serious issues, including fractures.
To manage this side effect, it is important to be cautious when standing up from a seated or lying position. If you feel dizzy, it is recommended to sit or lie down immediately and wait until the dizziness subsides before slowly getting up again. It is also advised not to drive, cycle, or operate machinery if experiencing dizziness.
The risk of orthostatic hypotension may be higher when first starting the medication, increasing the dose, or taking other medications that can lower blood pressure. Therefore, it is crucial to consult with your healthcare provider and carefully follow their instructions for monitoring your blood pressure while on Cymbalta.
If you experience bothersome or persistent side effects, be sure to discuss them with your doctor or pharmacist. They can provide guidance on managing side effects and explore alternative treatment options if necessary.
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Other side effects include nausea, dry mouth, and drowsiness
Cymbalta (duloxetine) is a medication that treats depression, anxiety, fibromyalgia, and certain types of chronic pain. It is also used to treat nerve damage associated with diabetes (diabetic peripheral neuropathy). Like all medicines, duloxetine can cause side effects in some people, but most experience none or only minor ones.
Some of the more common side effects of Cymbalta include nausea, dry mouth, and drowsiness. Nausea is the most commonly reported side effect, affecting up to 30% of users. Dry mouth can be managed by chewing sugarless gum or sucking on hard candy, and drinking plenty of water. If these measures do not help, be sure to contact your healthcare provider.
Other side effects that may occur with Cymbalta use include dizziness, headaches, vomiting, abdominal pain, diarrhoea, and constipation. These side effects may be temporary, lasting a few days to weeks, and can often be managed by adjusting the dosage or taking the medication with food. It is important to consult your healthcare provider if you experience any bothersome or persistent side effects.
In rare cases, Cymbalta may cause serious side effects, such as allergic reactions, seizures, and angle-closure glaucoma. It is important to be aware of these potential side effects and seek medical attention if necessary. Additionally, Cymbalta may affect blood sugar levels, so individuals with diabetes should monitor their blood sugar closely and consult their healthcare provider if they notice any changes.
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Frequently asked questions
Yes, Cymbalta can cause involuntary muscle movement in the form of muscle twitches or spasms, leg jerks, and restless legs.
Cymbalta can cause a range of side effects, including nausea, weight loss or gain, dry mouth, vision changes, seizures, and sexual dysfunction. It can also cause or worsen symptoms of tension, restlessness, frustration, irritability, and lack of patience.
Yes, Cymbalta may cause serious side effects such as suicidal thoughts or behaviours, mania, and liver damage, especially in individuals with pre-existing liver conditions or high alcohol consumption. Seizures are also listed as a rare but serious side effect.
If you experience any side effects from Cymbalta, it is important to consult your doctor or healthcare provider right away. Do not stop taking Cymbalta without first checking with your doctor, as this can lead to withdrawal symptoms.
Yes, Cymbalta may interact with other medications, including certain psychiatric medications. It is important to discuss all medications you are taking with your doctor to avoid potential drug interactions.











































