Maximus Gage
Drugs that break down muscle can cause a range of issues, from chronic pain to organ damage. The muscular system is the largest system in the body and is responsible for movement, blood circulation, and posture. Damage to this system can have far-reaching consequences, and certain drugs can cause muscle breakdown through toxicity, side effects, or interference with neuromuscular transmission. Drug-induced myopathies, or muscle diseases, can result from direct injection into a muscle or systemic drug use, and may be reversible if the drug is withdrawn. Some drugs, like statins, antipsychotics, antidepressants, antivirals, and antibiotics, can lead to rhabdomyolysis, a condition where muscle tissue breaks down and releases toxins into the bloodstream, potentially causing kidney failure. Other drugs, like cocaine and methamphetamine, can damage the central nervous system, which controls the muscular system, leading to movement problems. Additionally, weight-loss drugs can induce muscle loss, and growth hormone treatments can have adverse effects, including muscle pain.
| Characteristics | Values |
|---|---|
| Drug class | Statins, nephrotoxic drugs, colchicine, corticosteroids, antibiotics, drugs of addiction, antipsychotics, antidepressants, antivirals, anticholinesterases, stimulants, cocaine, methamphetamine, ecstasy, spice, inhalants, weight loss drugs, etc. |
| Mechanism of action | Direct toxic effect, local or diffuse, secondary to electrolyte disturbances, muscle compression, ischaemia, neural activation, immunological reaction, etc. |
| Symptoms | Muscle pain, weakness, stiffness, dark-colored urine, etc. |
| Complications | Rhabdomyolysis, myopathy, myotonia, myoglobinuria, acute renal failure, kidney failure, paralysis, etc. |
| Prevention | Prompt recognition of symptoms, lifestyle changes, strength training, etc. |
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What You'll Learn
Alcohol and drug abuse
Alcohol abuse can directly impact the musculoskeletal system by altering digestive processes and nutrient absorption, leading to deficiencies in vitamins and minerals essential for muscle health. Chronic alcohol consumption can also cause a condition called alcoholic myopathy, characterized by muscle weakness and loss of function in skeletal muscles due to long-term or heavy drinking. Binge drinking can lead to acute alcoholic myopathy, which is potentially life-threatening, as it can result in rhabdomyolysis, where muscle tissue breaks down and releases toxins into the bloodstream, causing kidney failure.
Additionally, alcohol abuse can compromise the central nervous system, affecting the brain and spinal cord. This can lead to movement disorders, seizures, and impaired judgment, increasing the risk of accidents and further muscle damage. The process of metabolizing alcohol creates a toxic substance called acetaldehyde, which increases the risk of cancer and contributes to muscle breakdown.
Illicit drug abuse, including stimulants like cocaine and methamphetamine, and opiates, can also negatively impact the muscular system. These drugs can damage important areas of the brain, leading to movement problems and seizures. Chronic drug use can compromise the vascular system in the brain, increasing the risk of stroke, which can result in paralysis, muscle weakness, and atrophy. Additionally, stimulant and opiate drugs place a significant burden on the heart, leading to deterioration of the heart muscle, high blood pressure, and heartbeat irregularities, increasing the risk of heart disease and stroke.
Furthermore, certain prescription drugs can also cause muscle toxicity (myotoxicity). For example, statins, which are used to lower cholesterol, are known to cause myopathy, resulting in muscle weakness and pain. Other drugs that interact with the liver's CYP3A4 enzyme, such as tolbutamide, erythromycin, and clarithromycin, can increase the incidence of toxic effects on the muscles when taken with colchicine.
To mitigate muscle loss or damage caused by alcohol and drug abuse, lifestyle changes and medical interventions may be necessary. In the case of alcohol-related muscle disease, studies suggest that exercise and drug interventions like growth hormone regulators, myostatin antagonists, and androgen modulation may be beneficial. For individuals taking GLP-1 drugs for weight loss, endurance and resistance training can help slow down muscle loss. Vitamin B and choline supplements may also be beneficial in slowing down glaucoma, according to mouse studies. However, it is important to consult with healthcare professionals for personalized advice and treatment plans.
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Drug-induced myopathies
Myopathies are a group of disorders that primarily affect the skeletal muscle structure, metabolism, or channel function. They usually present with muscle pain or muscle weakness that interferes with daily life activities. Symptoms of myopathy typically occur weeks or months after drug administration and usually improve or resolve within weeks after discontinuing the drug.
The most prevalent and well-documented drug class with unintended myotoxicity is the statins. However, other drugs such as hypolipemic drugs, beta-blockers, amiodarone, colchicine, glucocorticosteroids, antimalarials, cyclosporine, zidovudine, and checkpoint inhibitors have also been associated with myopathic effects. Colchicine, for example, has been shown to significantly decrease the exocytosis of the acetylcholine receptor, leading to "lysosomal constipation" and myopathy.
Certain drugs, like powerful stimulants such as cocaine and methamphetamine, can also damage important areas in the brain, which can lead to movement problems and subsequent damage to the musculoskeletal system. Chronic alcohol use can also lead to conditions that affect the muscles, such as rhabdomyolysis, where muscle tissue breaks down and releases toxins into the bloodstream, eventually compromising the entire muscular system.
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Weight-loss drugs
Weight loss drugs can help people shed excess fat quickly. However, they can also contribute to muscle loss. During any weight loss intervention, it is normal to lose lean mass, which includes muscle. But too much muscle loss can be problematic.
Some weight loss drugs such as Wegovy, Ozempic, and Mounjaro have been found to cause a decline in muscle mass. For instance, in a 2021 clinical trial, Wegovy was found to have caused a 40% loss of lean mass, including muscle, at the end of 68 weeks. Similarly, in a 2021 study, semaglutide, the active drug in Wegovy, was found to have caused a 3.61% loss of lean mass.
To prevent muscle loss while taking weight loss drugs, it is important to eat enough protein and engage in resistance training. Animal-based foods such as lean meats, eggs, and dairy products are often high in protein. For those following a plant-based diet, nuts, seeds, beans, and tofu are good sources of protein. Resistance training helps increase protein synthesis in the muscles and improves their composition and function.
Some drugmakers are developing new weight-loss treatments aimed at preserving muscle. Drugs such as Veru's enobosarm and Eli Lilly's bimagrumab are being tested to see if they can help preserve muscle mass while causing weight loss.
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Muscle toxicity
Drugs can cause myotoxicity by interacting with muscle organelles such as mitochondria, lysosomes, and myofibrillar proteins; changing muscle antigens, resulting in an immunological or inflammatory reaction; and causing systemic effects such as electrolyte instabilities or limiting the oxygen supply for energy production, which secondarily affects muscle function.
Cholesterol-lowering medications, particularly statins, have been commonly described as causing myopathy in recent years. Statins can cause toxic necrotizing myopathy, which stops when the medication is discontinued. However, recent evidence suggests that statins also trigger an autoimmune myopathy that can progress for months after discontinuation, referred to as statin-associated necrotizing autoimmune myopathy (SANAM). Other drugs that can cause necrotizing myopathy include immunophilins (cyclosporine and tacrolimus), the antihypertensive agent labetalol, and propofol.
Colchicine, a nephrotoxic drug, can also cause myopathy, typically presenting as proximal muscle weakness. Colchicine-induced disturbance of the cytoskeletal network may result in intracellular accumulation of autophagic vacuoles, leading to "lysosomal constipation".
The pathogenic bases of toxic myopathies can be multifactorial, and clinical features range from mild muscle pain and cramps to severe weakness with rhabdomyolysis, renal failure, and even death. Early recognition of toxic myopathies is important, as they are potentially reversible upon removal of the offending drug or toxin, with a greater likelihood of complete resolution the sooner this is achieved.
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Movement problems
Drug-induced myopathy, or muscle disease, can cause muscle weakness, pain, inflammation, stiffness, spasms, and cramps. The range of drug-related muscle symptoms is wide, and can include more severe issues such as rhabdomyolysis, a rare and life-threatening condition where muscle fibres break down, releasing toxins into the bloodstream. This can lead to kidney damage and even failure.
Drugs that can cause rhabdomyolysis include antipsychotics, antidepressants, antivirals, and statins, particularly when treating diabetes or liver disease. Statins are the most prevalent and well-documented drug class with unintended myotoxicity. However, new classes of drugs with unintended myotoxicity are being discovered. Other drugs that can cause myopathy include hypolipemic drugs, beta-blockers, amiodarone, colchicine, glucocorticosteroids, antimalarials, cyclosporine, zidovudine, and checkpoint inhibitors.
Chronic alcohol use can lead to rhabdomyolysis, as the process of metabolising alcohol creates a toxic substance, acetaldehyde, which can increase the risk of muscle tissue breakdown. Alcohol is also a central nervous system depressant, which can directly alter digestive processes and the absorption of nutrients like calcium, increasing the risk of bone diseases.
Other central nervous system depressants, such as benzodiazepines, can affect certain areas of the brain, leading to problems with movement, emotional control, and memory. Powerful stimulant drugs such as cocaine and methamphetamine, and other drugs like ecstasy, spice, and inhalants, can damage important areas in the brain, which can also lead to movement problems.
Intravenous use of opiate drugs can compromise the cardiovascular system and lead to infections of the joints and tendons. Chronic use of drugs can also impair judgement and motor coordination, leading to accidents that can damage the muscles and musculoskeletal system.
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Frequently asked questions
Some drugs that can cause muscle breakdown include statins, antipsychotics, antidepressants, antivirals, and antibiotics.
Muscle breakdown, or rhabdomyolysis, occurs when muscle tissue breaks down and releases toxins into the bloodstream. This can lead to kidney failure and compromise the entire muscular system.
Symptoms of muscle breakdown include weak muscles, muscle stiffness, and a change in urine colour.
Yes, besides drugs, muscle breakdown can also be caused by injury or trauma, high-intensity exercise, severe dehydration, and overheating.
