
Naproxen is a non-steroidal anti-inflammatory drug (NSAID) that is used to treat pain and inflammation caused by conditions such as arthritis, ankylosing spondylitis, and tendinitis. It is available by prescription as tablets or liquid and is also available over the counter. While naproxen can be effective in managing pain and inflammation, it has been associated with several side effects, including an increased risk of bleeding, ulcers, and tears in the gut. In rare cases, naproxen may also cause muscle weakness, among other symptoms.
| Characteristics | Values |
|---|---|
| Muscle weakness | Naproxen can cause muscle weakness, especially in patients with Bartter syndrome, a condition in which the body does not absorb enough potassium. |
| Other side effects | Confusion, headache, ringing in the ears, changes in vision, tiredness, drowsiness, dizziness, rashes, stomach pain, nausea, vomiting, nerve issues, and more. |
| Risk factors | Long-term use, high doses, heart disease, history of stomach ulcers, bleeding problems, poor health, age 60 or older, liver disease, smoking, alcohol consumption, and certain medications. |
| Treatment | Stop taking naproxen and seek medical attention. Naproxen may be replaced with alternative medications or treatments. |
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What You'll Learn

Naproxen's effect on potassium levels
Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) commonly used to reduce fever and relieve mild pain from headaches, muscle aches, arthritis, menstrual periods, the common cold, toothaches, and backaches. It is also used to treat Paget's disease of bone and Bartter syndrome.
Naproxen can increase potassium levels in the blood, a condition known as hyperkalemia. This effect is particularly pronounced when an individual's kidneys are not functioning optimally. Hyperkalemia can cause severe health issues, especially in patients with kidney disease. Therefore, it is crucial to monitor potassium levels in the blood while taking naproxen.
The symptoms of hyperkalemia include stomach pain, confusion, difficulty breathing, irregular heartbeat, nausea, vomiting, nervousness, numbness or tingling in the hands, feet, or lips, and weakness or heaviness of the legs. If you experience any of these symptoms while taking naproxen, it is imperative to seek immediate medical attention and stop taking the medication.
Additionally, naproxen may cause other side effects, such as an increased risk of bleeding, ulcers, and tears in the gut, especially in individuals with a history of stomach ulcers or bleeding disorders. It can also lead to anemia, liver damage, and increased blood pressure. Elderly patients and those with a history of peptic ulcer disease and/or gastrointestinal bleeding are at a higher risk for adverse gastrointestinal events.
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Naproxen and muscle weakness
Naproxen is a non-steroidal anti-inflammatory drug (NSAID) used to treat pain and inflammation caused by conditions such as arthritis, ankylosing spondylitis, and tendinitis. It is available by prescription as tablets or liquid and is also available over the counter. Naproxen can cause muscle weakness, among other side effects.
Naproxen may cause muscle weakness as a result of its effect on potassium levels in the blood, a condition known as hyperkalemia. This can lead to weakness or heaviness in the legs. Additionally, naproxen has been associated with increased risk of serious cardiovascular events, including myocardial infarction and stroke, which can result in muscle weakness.
Furthermore, naproxen can cause allergic reactions, including a severe form called anaphylaxis, which may also contribute to muscle weakness. Some people may also experience muscle pain and aches as side effects of naproxen, which can indirectly lead to muscle weakness.
It is important to note that muscle weakness may also be a sign of more serious underlying conditions. Therefore, if you experience muscle weakness while taking naproxen, it is important to consult your doctor or healthcare provider for proper evaluation and advice. They may recommend discontinuing the medication or adjusting the dosage to alleviate the side effects.
In addition to muscle weakness, naproxen has other potential side effects, including stomach pain, nausea, vomiting, increased blood pressure, skin rash, and blurred vision. It is important to be aware of these side effects and consult a healthcare professional if they occur.
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Naproxen's effect on the heart
Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain, inflammation, and fever. NSAIDs have been associated with an increased risk of cardiovascular events, such as myocardial infarction and stroke, which has raised concerns about their safety.
Naproxen has been found to have the lowest risk among common NSAIDs for cardiovascular-related events and deaths. It does not significantly increase systolic blood pressure, and its ability to inhibit thromboxane production and platelet aggregation contributes to its safer profile. However, it is important to note that the risk may be higher in patients with existing cardiovascular disease or risk factors.
The US FDA Advisory Committee meetings in 2005 and 2014 concluded that NSAIDs, including naproxen, increase the risk of myocardial infarction (heart attack) in high-risk individuals. This led to changes in the labelling of NSAIDs to highlight this risk. Studies have also shown that people with heart failure or those taking blood thinners may experience negative effects on their health after taking NSAIDs like naproxen.
Naproxen can cause an increased risk of bleeding, ulcers, and tears in the stomach or intestines, which can be fatal. Elderly patients and those with a history of gastrointestinal issues are at a higher risk for these adverse events. Additionally, naproxen may cause an increase in potassium levels in the blood (hyperkalemia), especially if kidney function is impaired. This can lead to irregular heartbeats and requires immediate medical attention.
In summary, while naproxen has been found to have a relatively safer cardiovascular profile compared to other NSAIDs, it can still pose risks, especially for individuals with existing cardiovascular disease or risk factors. It is important for patients to discuss their medical history and any concerns with their doctor before taking naproxen or any other NSAID.
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Naproxen and allergic reactions
Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) used to treat pain and inflammation caused by conditions such as arthritis, ankylosing spondylitis, and tendinitis. It is also used to reduce fever and relieve mild pain from headaches, muscle aches, menstrual periods, and backaches. While naproxen can be effective in managing these conditions, it is important to be aware of its potential side effects, particularly allergic reactions.
Naproxen has been associated with a range of allergic reactions, from mild to severe. One of the most serious allergic reactions that can occur is anaphylaxis, which is rare but can be life-threatening. Anaphylaxis typically presents with symptoms such as a rash, itching, hoarseness, trouble breathing, swelling of the face, hands, or mouth, and dizziness. If you experience any of these symptoms after taking naproxen, seek immediate medical attention as anaphylaxis requires prompt treatment.
In addition to anaphylaxis, naproxen can also cause severe skin reactions, including exfoliative dermatitis, Stevens-Johnson syndrome, toxic epidermal necrolysis (TEN), and Drug Reaction with Eosinophilia and Systemic Symptoms (DRESS). DRESS is a multiorgan hypersensitivity reaction that can affect the liver, kidneys, and heart. Symptoms of severe skin reactions may include painful red or purple skin that peels off, a flat red rash, blisters, fever, sore throat, and swelling of the face or tongue. If you experience any symptoms of a severe skin reaction, discontinue naproxen and seek medical help immediately.
Naproxen may also increase the risk of gastrointestinal (GI) adverse events, including bleeding, ulceration, and perforation in the stomach or intestines. These events can be fatal, especially in older adults or individuals with a history of peptic ulcer disease or GI bleeding. Additionally, naproxen has been linked to an increased risk of cardiovascular thrombotic events, such as myocardial infarction and stroke, which can also be fatal. It is important to discuss your medical history and any potential risks with your doctor before taking naproxen to ensure it is safe for you.
While less common, some individuals may experience allergic reactions to naproxen that affect other systems in the body. For example, naproxen has been associated with liver damage (hepatotoxicity), kidney problems (such as decreased urination), and anaemia (low red blood cell counts). If you experience any unusual symptoms or feel unwell while taking naproxen, it is important to contact your healthcare provider for advice and to determine if naproxen is the cause.
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Naproxen's effect on the stomach
Naproxen is a nonsteroidal anti-inflammatory drug (NSAID) that is prescribed to reduce pain and inflammation caused by arthritis. NSAIDs are generally well tolerated, but they can have side effects and should be avoided by people with certain conditions.
Naproxen can cause gastrointestinal problems, including stomach irritation and reflux. In severe cases, it can irritate the lining of the stomach, leading to an ulcer, which is a small erosion. This can result in internal bleeding, which may be life-threatening. Perforation, or a "hole" in the stomach, can also occur, requiring immediate medical attention. The risk of these adverse events is higher in elderly patients and those with a history of peptic ulcer disease and/or gastrointestinal bleeding.
Naproxen can also increase the risk of bleeding, ulcers, and tears (perforation) in the gut. The risk is higher if you have a history of stomach ulcers, bleeding problems, take higher doses of naproxen or take it for longer than directed, have poor health, are aged 60 or older, have liver disease, smoke, drink alcohol, or take certain other medications.
In addition, naproxen may cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. This risk is higher in patients with cardiovascular disease or risk factors for cardiovascular disease. It is important to note that naproxen should not be taken right before or after heart surgery, as it can increase the risk of a heart attack or stroke.
Naproxen can also cause severe skin reactions, including exfoliative dermatitis, Stevens-Johnson syndrome, toxic epidermal necrolysis, and drug reaction with eosinophilia and systemic symptoms (DRESS). If you experience any of these side effects, you should stop taking naproxen and seek medical advice.
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Frequently asked questions
Yes, naproxen can cause muscle weakness. It is a non-steroidal anti-inflammatory drug (NSAID) that is used to treat pain or inflammation caused by conditions such as arthritis, ankylosing spondylitis, and tendinitis. Some common side effects of naproxen include confusion, headache, ringing in the ears, changes in vision, tiredness, drowsiness, dizziness, and rashes.
Naproxen may cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. It can also increase the risk of bleeding, ulcers, and tears in the gut. Other side effects include nausea, vomiting, bloody or black and sticky bowel movements, skin rash, unexplained weight loss or weight gain, and swelling of the hands and feet.
If you experience muscle weakness or any other side effects while taking naproxen, you should stop taking the medication and seek medical advice from your doctor or healthcare provider. It is important to report any side effects to your healthcare professional and follow their instructions.











































