Combining Methadone and Tizanidine is a major interaction and should generally be avoided without close medical supervision.
Patients may experience profound sedation, somnolence, dizziness, and impaired psychomotor function. The most serious clinical effect is an increased risk of respiratory depression, which can be life-threatening. Hypotension and bradycardia may also occur due to additive effects on the cardiovascular system.
Mechanism: Methadone, an opioid agonist, and tizanidine, an alpha-2 adrenergic agonist muscle relaxant, both exert significant central nervous system (CNS) depressant effects. Their co-administration leads to an additive pharmacological effect, increasing the overall level of CNS depression. This synergistic action primarily affects neuronal excitability and neurotransmission in the brain and spinal cord.
Methadone vs. Tizanidine
Compare Methadone and Tizanidine: mechanism of action, indications, side effects, cost, and which may be right for you.
Drug A
Methadone
Methadone Hydrochloride
Opioid Analgesics
RxDrug B
Tizanidine
Tizanidine
Skeletal Muscle Relaxants
RxQuick Comparison
| Category | Methadone | Tizanidine |
|---|---|---|
| Drug Class | Opioid Analgesics | Skeletal Muscle Relaxants |
| Rx Status | Rx | Rx |
| Generic Available | No | No |
| Typical Cost | $15–$60/month | $4–$25/month |
Methadone Overview
METHADONE (brand name: Methadone Hydrochloride) is a Opioid Analgesics. 1 INDICATIONS AND USAGE Methadone hydrochloride tablets is indicated for the: Management of severe and persistent pain that requires an opioid analgesic and that cannot be adequately treated with alternative options, including immediate-release opioids. Limitations of Use Because of the risks of…
Full Methadone guide →Tizanidine Overview
Tizanidine is a medication used to relax muscles and reduce muscle stiffness or spasms (spasticity). It works by acting on the nervous system to calm overactive nerve signals that cause muscles to tighten. This helps improve muscle movement and comfort for daily activities.
Full Tizanidine guide →How Each Drug Works
Methadone
Methadone hydrochloride is a mu-agonist; a synthetic opioid with multiple actions qualitatively similar to those of morphine, the most prominent of which involves the central nervous system and organs composed of smooth muscle. The principal therapeutic uses for methadone are for analgesia and for detoxification or maintenance in opioid addiction. The methadone withdrawal syndrome, although qualitatively similar to that of morphine, differs in that the onset is slower, t…
Tizanidine
Tizanidine is a central alpha-2-adrenergic receptor agonist and presumably reduces spasticity by increasing presynaptic inhibition of motor neurons. The effects of tizanidine are greatest on polysynaptic pathways. The effect of these actions is thought to reduce facilitation of spinal motor neurons.
Approved Uses (Indications)
Methadone
Methadone hydrochloride tablets is indicated for the: Management of severe and persistent pain that requires an opioid analgesic and that cannot be adequately treated with alternative options, including immediate-release opioids. Limitations of Use Because of the risks of addiction, abuse, misuse, overdose, and death, which can occur at any dosage or duration and persist over the course of therapy [see WARNINGS AND PRECAUTIONS ], reserve opioid analgesics, including methadone hydrochloride tablets, for use in patients for whom alternative analgesic treatment opti…
Tizanidine
Tizanidine Tablets, USP is a central alpha-2-adrenergic agonist indicated for the management of spasticity. Because of the short duration of therapeutic effect, treatment with Tizanidine Tablets, USP should be reserved for those daily activities and times when relief of spasticity is most important [see Dosage and Administration ]. Tizanidine Tablets, USP is a central alpha-2-adrenergic agonist indicated for the management of spasticity. Because of the short duration of therapeutic effect, treatment with Tizanidine Tablets, USP should be reserved for those daily ac…
Side Effects
Methadone
Tizanidine
Cost Comparison
Methadone
$15–$60/month
Generic methadone is very affordable, especially with discount cards like GoodRx. Many pharmacies offer low-cost programs for this medication.
Tizanidine
$4–$25/month
Tizanidine is available as an affordable generic. Patients can often find significant savings by using discount cards like GoodRx or checking prices at different pharmacies.
Compare prices for Methadone and Tizanidine
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Medical Disclaimer
The information on RxGuide is intended for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician, pharmacist, or other qualified health provider with any questions you may have regarding a medical condition or medication. Never disregard professional medical advice or delay in seeking it because of something you have read on this website.