Athena Vale
Muscle spasms can be caused by a variety of factors, including dehydration, electrolyte imbalance, and certain medications. While muscle relaxers and other treatments can provide relief, it is important to identify and address the underlying cause to effectively manage and prevent muscle spasms. Certain medications have been linked to muscle spasms and related issues such as stiffness, cramping, and pain. These medications include cholesterol-lowering drugs, antiarrhythmic medicines used to treat heart rhythm problems, antipsychotics, diuretics, and more. Understanding the potential side effects of medications and their impact on muscle function is crucial for holistic health management.
| Characteristics | Values |
|---|---|
| Drugs that cause muscle spasms | Pregabalin (Lyrica), cholesterol-lowering drugs, fibrates, antiarrhythmic medicines, corticosteroids, antipsychotics, diuretics, thiazide diuretics, beta-blockers, ACE inhibitors, antiretrovirals, chemotherapy agents, tumour necrosis factor-alpha inhibitors, D-penicillamine, antiepileptic drugs, omeprazole, propofol, immune checkpoint inhibitors, immunosuppressive agents |
| Drugs that treat muscle spasms | Muscle relaxers, antispastics, acetaminophen, NSAIDs, ibuprofen, pregabalin, dantrolene, diazepam, tetrahydrocannabinol (THC) |
| Muscle spasm risk factors | Age, lack of stretching, muscle fatigue, exercising in extreme heat, dehydration, electrolyte imbalance, vitamin or mineral deficiency, overuse of muscles, improper sitting, standing or working on concrete floors |
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What You'll Learn
Muscle relaxers and antispastics
Muscle relaxers are prescription medications that can help treat muscle spasms, spasticity, and musculoskeletal pain. They are categorised based on their ability to treat stiffness, spasms, or both. Muscle relaxers are usually prescribed when over-the-counter (OTC) and non-drug therapies, such as physical therapy, stretching, or heat therapy, are ineffective. They are the third most prescribed medication for low back pain. Muscle relaxers, or muscle relaxants, are medications used to treat muscle spasms or muscle spasticity. Muscle spasms or cramps are sudden, involuntary contractions of a muscle or group of muscles. They can be caused by too much muscle strain and can lead to pain. They are associated with conditions such as lower back pain, neck pain, and fibromyalgia. Muscle spasticity, on the other hand, is a continuous muscle spasm that causes stiffness, rigidity, or tightness that can interfere with normal walking, talking, or movement. Muscle spasticity is caused by injury to parts of the brain or spinal cord involved with movement. Conditions that can cause muscle spasticity include multiple sclerosis (MS), cerebral palsy, and amyotrophic lateral sclerosis (ALS).
Antispastics are used to treat muscle spasticity and should not be used to treat muscle spasms. Antispastic medications act on the spinal cord or skeletal muscle directly to improve muscle tightness (hypertonicity) and involuntary spasms. Antispastic skeletal muscle relaxants that are prescribed in the U.S. include Baclofen (Lioresal), which is used to relieve spasticity caused by MS, and Dantrolene (Dantrium), which is used to treat muscle spasms caused by spinal cord injury, stroke, cerebral palsy, or MS.
There are currently no over-the-counter muscle relaxers in the United States, but acetaminophen and NSAIDs, such as ibuprofen, can help manage sore muscles.
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Cholesterol-lowering drugs
Statins are a common type of cholesterol-lowering drug that can cause muscle pain as a side effect. While statins are generally well-tolerated, they have been linked to rare but serious side effects, including myositis (inflammation of the muscles) and rhabdomyolysis (a life-threatening condition that causes severe muscle damage). The risk of muscle injury is further elevated when statins are combined with other medications, particularly fibrates, another type of cholesterol-lowering drug.
Fibrates, such as fenofibrate (Tricor) and gemfibrozil (Lopid), are a less common type of cholesterol-lowering medication that can also lead to muscle-related problems. This risk is higher in older adults and individuals with diabetes, kidney problems, or hypothyroidism. While rare, fibrates can cause rhabdomyolysis, especially when taken in conjunction with statins or gout medication like colchicine (Colcrys).
If you experience muscle pain or weakness while taking cholesterol-lowering drugs, it is important to consult your doctor or healthcare provider. They may recommend lifestyle changes, such as a heart-healthy diet, increased physical activity, or quitting smoking, to help manage your cholesterol and reduce medication dosage. Additionally, they can advise on alternative medications or adjustments to your current medication regimen to alleviate muscle-related side effects.
It is worth noting that not everyone experiences muscle pain when taking cholesterol-lowering drugs, and the benefits of these medications often outweigh the risks. However, if muscle pain occurs, it is important to seek guidance from a healthcare professional before making any changes to your medication. They may suggest a "statin vacation," where you temporarily stop taking the drug under their supervision, or recommend adjusting the dosage or switching to a different statin or non-statin medication.
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Antipsychotics
Types of Antipsychotics
Movement Disorders Caused by Antipsychotics
- Dystonia: This involves involuntary muscle contractions that can lead to twisting, distorted postures, and abnormal movements, often affecting the head, neck, mouth, or jaw. It can be painful and may lead to respiratory distress, asphyxia, and choking.
- Parkinsonism: This condition mimics Parkinson's disease, causing tremors, slow and rigid movements, hypokinesia (decreased bodily movement), and unsteadiness.
- Akathisia: Described as an "inner restlessness" that makes it difficult to sit still, this condition can be misunderstood and lead to patients discontinuing their medication without medical advice.
- Tardive Dyskinesia: This condition involves uncontrollable, repetitive movements, often of the mouth, tongue, facial muscles, and upper limbs. It can interfere with daily life and may persist even after discontinuing the medication.
- Neuroleptic Malignant Syndrome (NMS): A rare but life-threatening response to antipsychotics, characterised by exhaustion, agitation, hyperthermia, mental status change, muscle rigidity, and other movement disorders.
Treatment and Management
The treatment of antipsychotic-induced movement disorders typically involves lowering the dosage of the antipsychotic or switching to a second-generation antipsychotic. Benzodiazepines, beta-blockers, and muscle relaxants may also be used to manage muscle spasms and cramps. It is important for clinicians to regularly evaluate patients for these conditions and carefully consider the potential risks and benefits of antipsychotic treatment.
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Diuretics
The exact mechanism behind diuretic-associated muscle cramping is not fully understood, but it is believed to be related to electrolyte disturbances, specifically hypokalemia (low potassium levels), hypomagnesemia (low magnesium levels), or volume contraction (with or without metabolic alkalosis). These electrolyte imbalances can lead to changes in nerve function and muscle excitability, potentially triggering muscle spasms.
Additionally, the Physicians' Desk Reference, a reputable medical database, lists "muscle cramps or spasms" as an adverse effect of diuretics, specifically mentioning indapamide, a thiazide-like indoline diuretic, with an incidence rate of 5% or higher.
It is important to note that while diuretics may contribute to muscle spasms, the link is primarily based on anecdotal evidence and case reports. Some studies have challenged this association, finding no direct correlation between diuretic use and muscle cramps. However, due to the potential risk, it is advisable for patients taking diuretics to be vigilant about monitoring their electrolyte levels and overall health, especially since severe electrolyte imbalances can have serious health consequences beyond muscle spasms.
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Immunosuppressive agents
In some cases, muscle weakness caused by immunosuppressive agents can be a sign of a more severe condition called myopathy, which is characterised by muscle fibre death. Myopathy can also be caused by other drugs, including statins, fibrates, and antimalarials. If you experience muscle pain or weakness while taking immunosuppressive agents or other medications, it is important to consult your doctor or healthcare provider. They may recommend adjusting the dosage, switching medications, or discontinuing treatment.
It is worth noting that immunosuppressive agents are not typically associated with muscle spasms or cramping. However, they can increase the risk of infections, which may indirectly lead to muscle spasms in some cases. Additionally, muscle spasms can be caused by various factors, including muscle strain, injury to the brain or spinal cord, or underlying conditions such as multiple sclerosis (MS), cerebral palsy, or amyotrophic lateral sclerosis (ALS). While immunosuppressive agents may not directly cause muscle spasms, they can impact muscle health and function, and any concerns should be addressed with a healthcare professional.
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Frequently asked questions
Yes, there are several medications that can cause muscle spasms. These include cholesterol-lowering drugs, antiarrhythmic medicines, corticosteroids, pregabalin, teriparatide, antipsychotics, diuretics, thiazide diuretics, ACE inhibitors, beta-blockers, and more.
Muscle spasms are sudden, involuntary contractions of a muscle or group of muscles that can cause twitching and pain. They can last from seconds to 15 minutes or longer and may recur multiple times.
If you experience muscle spasms after starting a new medication, consult your healthcare provider. They may recommend adjusting your medication or suggest alternative treatments. It is important to treat muscle spasms as they can interfere with normal activities and may indicate an underlying medical condition.
Yes, muscle relaxers or muscle relaxants are medications used to treat muscle spasms. However, they may cause side effects such as drowsiness, dizziness, and nausea. Other options include over-the-counter pain relievers such as ibuprofen, naproxen, or acetaminophen.
