Tizanidine is available as both a brand-name drug and a generic medication. The brand name for tizanidine is Zanaflex [1]. Generic versions of tizanidine are also available from various pharmaceutical manufacturers [2].
Why is Tizanidine Prescribed?
Tizanidine is a muscle relaxant that is primarily used to treat spasticity, which is characterized by an abnormal increase in muscle tone that can lead to muscle stiffness and a variety of painful movements. It is often prescribed for conditions such as multiple sclerosis, spinal cord injury, stroke, and other neurological disorders that affect muscle control [3][4].
How Does Tizanidine Work?
Tizanidine functions as an alpha-2 adrenergic agonist. It works in the central nervous system by blocking the nerve impulses that cause spasticity. Specifically, it acts on alpha-2 adrenergic receptors in the brain and spinal cord, which reduces the release of excitatory neurotransmitters that contribute to increased muscle tone [5][6].
When Does Tizanidine Go Off Patent?
The patent protection for the original brand-name drug, Zanaflex, has expired. This has allowed for the introduction of generic versions of tizanidine into the market [7].
What Tizanidine Products Are Available?
Tizanidine is available in capsule and tablet forms [8]. These are prescribed by healthcare providers to manage muscle spasticity [3][4].
How Does Generic Tizanidine Compare to Zanaflex?
Generic tizanidine products are bioequivalent to the brand-name drug Zanaflex. This means they contain the same active ingredient and are absorbed into the body at the same rate and to the same extent, making them therapeutically equivalent [9]. The U.S. Food and Drug Administration (FDA) requires generic drugs to meet the same standards of safety, efficacy, and quality as their brand-name counterparts [10].
What Are the Potential Side Effects of Tizanidine?
Common side effects associated with tizanidine use can include drowsiness, dizziness, dry mouth, fatigue, and weakness [8][11]. Less common but more serious side effects may include hallucinations, liver problems, and low blood pressure [11]. Patients should discuss any concerns about side effects with their healthcare provider [11].
What Are Other Options for Managing Spasticity?
Beyond tizanidine, other treatment options for spasticity include different classes of muscle relaxants, physical therapy, occupational therapy, and other medications depending on the underlying cause and severity of the condition [4][12].
How Much Does Tizanidine Cost?
The cost of tizanidine can vary significantly between the brand-name drug and generic versions, as well as among different pharmacies and insurance plans. Generic tizanidine is typically less expensive than Zanaflex [13].
Sources:
[1] https://www.drugs.com/avana/zanaflex.html
[2] https://www.goodrx.com/tizanidine
[3] https://www.mayoclinic.org/drugs-supplements/tizanidine-oral-route/proper-use/drh-20067156
[4] https://www.nhs.uk/medicines/tizanidine/
[5] https://www.ncbi.nlm.nih.gov/books/NBK470402/
[6] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2947960/
[7] https://www.drugpatentwatch.com/
[8] https://medlineplus.gov/druginfo/meds/a694007.html
[9] https://www.fda.gov/drugs/generic-drugs/what-generic-drugs-are-and-how-they-get-approved
[10] https://www.fda.gov/consumers/consumer-updates/why-generic-drugs-cost-less
[11] https://www.webmd.com/drugs/2/200944/tizanidine/details
[12] https://www.hopkinsmedicine.org/health/treatment-diseases/spasticity
[13] https://www.goodrx.com/zanaflex