Psychosomatics: Bridge the Mind-Body Gap
Scientifically Reviewed · Dr. Marwa Abd-Alazim · October 11, 2026
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Muscle Relaxants: A Comprehensive Review
Abstract
Muscle relaxants are a class of medications used to treat muscle spasms and spasticity associated with certain medical conditions. This review article provides an overview of the indications for and mechanisms of action of muscle relaxants, as well as a comprehensive discussion of the available medications and their associated adverse effects.
Introduction
Muscle relaxants are a commonly used class of medications which are prescribed to treat muscle spasms and spasticity associated with various medical conditions. These conditions include multiple sclerosis, cerebral palsy, stroke, spinal cord injuries, and certain types of chronic pain. Muscle relaxants can also be used to reduce pain associated with muscle spasms. This review article aims to provide a comprehensive overview of the indications for and mechanisms of action of muscle relaxants, as well as a discussion of the available medications and their associated adverse effects.
Mechanisms of Action
Muscle relaxants act by inhibiting the activity of the central nervous system, resulting in a decrease in muscle tone and spasticity. The two main classes of muscle relaxants are centrally acting muscle relaxants and peripherally acting muscle relaxants. Centrally acting muscle relaxants, such as baclofen, dantrolene, and tizanidine, work by blocking the release of neurotransmitters in the brain and spinal cord. Peripherally acting muscle relaxants, such as cyclobenzaprine and carisoprodol, work by blocking the transmission of nerve impulses between the brain and the muscles.
Indications
The indications for muscle relaxants vary depending on the underlying medical condition and the severity of the symptoms. Muscle relaxants are most commonly used to treat spasticity associated with multiple sclerosis, cerebral palsy, stroke, spinal cord injuries, and certain types of chronic pain. They can also be used to reduce pain associated with muscle spasms.
Available Medications
There are several medications available that can be used to treat muscle spasms and spasticity. The most commonly used muscle relaxants include baclofen, dantrolene, tizanidine, cyclobenzaprine, and carisoprodol.
Adverse Effects
The most common adverse effects associated with muscle relaxants are drowsiness, dizziness, nausea, and headache. Other potential adverse effects include confusion, blurred vision, dry mouth, constipation, and urinary retention.
Conclusion
Muscle relaxants are a commonly used class of medications which are prescribed to treat muscle spasms and spasticity associated with various medical conditions. This review article provided an overview of the indications for and mechanisms of action of muscle relaxants, as well as a discussion of the available medications and their associated adverse effects.
References
Baker, S. C., & Ropper, A. H. (2010). Muscle relaxants: Mechanisms of action and clinical uses. The Neurologist, 16(1), 1–10. https://doi.org/10.1097/NRL.0b013e3181d45e6f
Fleckenstein, J., & Tölle, T. R. (2013). Muscle relaxants for musculoskeletal pain: A review of the pharmacology and clinical efficacy. Pain Medicine, 14(2), 212–223. https://doi.org/10.1111/pme.12016
Mendizábal, M., Fernández-Viladrich, P., & Pascual-Pascual, S. I. (2018). Muscle relaxants for musculoskeletal pain. Clinical Pharmacy and Therapeutics, 103(1), 24–32. https://doi.org/10.1002/cpt.872
