Baclofen vs. Tizanidine
See how Baclofen and Tizanidine compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Baclofen and tizanidine are both oral muscle relaxants for spasticity, but they act on different receptors and cause different patterns of side effects.
Baclofen has decades of use and comes in more forms, including an intrathecal pump for severe cases, while tizanidine allows shorter, more flexible dosing intervals.
Stopping either drug suddenly can trigger serious withdrawal symptoms, so dose changes should always be supervised by a doctor.
Baclofen vs. Tizanidine Drug Summary
Baclofen
Baclofen is a GABA-B receptor agonist used to treat muscle spasticity caused by multiple sclerosis or spinal cord conditions. It comes as a tablet, oral solution, granules, or intrathecal injection for severe cases, and is usually taken three to four times a day.
Tizanidine
Tizanidine is a centrally acting alpha-2 adrenergic agonist approved for managing muscle spasticity. It comes as a tablet or capsule and is typically taken every six to eight hours, with doses adjusted based on response.
Baclofen vs. Tizanidine Side Effects
Baclofen
Tizanidine
Baclofen vs. Tizanidine Dosage
Baclofen
Tizanidine
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg three times daily | Days 1-3 |
| Maximum dose | 20 mg four times daily | If needed |
| Dose changes | 4 increases | Every 3 days |
| STAGE | DOSE | WHEN |
| Starting dose | 2 mg every 6-8 hrs | At the start |
| Maximum dose | up to 36 mg/day | If needed |
| Dose changes | 2 increases | As tolerated |
Baclofen
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg three times daily | Days 1-3 |
| Maximum dose | 20 mg four times daily | If needed |
| Dose changes | 4 increases | Every 3 days |
Tizanidine
| STAGE | DOSE | WHEN |
| Starting dose | 2 mg every 6-8 hrs | At the start |
| Maximum dose | up to 36 mg/day | If needed |
| Dose changes | 2 increases | As tolerated |
Baclofen vs. Tizanidine Indications
Baclofen
Baclofen is FDA-approved for spasticity linked to multiple sclerosis and spinal cord injury or disease. An intrathecal (pump-delivered) version is used for severe, treatment-resistant spasticity. It is sometimes used off-label for alcohol cravings, hiccups, or reflux, though those uses are not FDA-approved.
Spasticity from multiple sclerosis
Spasticity from spinal cord injury or disease
Severe spasticity (intrathecal pump formulations)
Off-label: alcohol cravings, hiccups, reflux
Tizanidine
Tizanidine is FDA-approved for the management of spasticity, without specifying an underlying cause. It is often used for spasticity from multiple sclerosis, spinal cord injury, or stroke, though the label itself is broad. It is also used off-label for chronic pain and migraine prevention.
Management of spasticity (general indication)
Commonly used for MS or spinal cord spasticity
Off-label: chronic low back or myofascial pain
Off-label: migraine prevention
Baclofen vs. Tizanidine Pros and Cons
Baclofen
Baclofen has been used since 1977 and comes in several forms, from tablets to an intrathecal pump for severe cases. It causes more drowsiness than tizanidine on average, and stopping it abruptly carries a well-documented risk of dangerous withdrawal.
Pros
Available in tablet, solution, granule, and pump forms
Long history of use with well-established dosing
Intrathecal option exists for severe, resistant spasticity
Used off-label for alcohol cravings and hiccups
Cons
Higher rate of drowsiness (up to 63%) than tizanidine
Requires dose reduction in kidney impairment
Abrupt withdrawal risk includes seizures and high fever
Not proven effective for stroke or cerebral palsy spasticity
Tizanidine
Tizanidine's shorter action allows dosing timed around specific activities, and it has no boxed warning. It carries its own risks, including blood pressure drops and interactions with certain antibiotics and antidepressants that make it unsuitable for some patients.
Pros
Shorter acting, allowing dosing around specific tasks
No FDA boxed warning
Useful alternative when baclofen isn't well tolerated
Flexible titration in small increments
Cons
Contraindicated with fluvoxamine and ciprofloxacin
Can cause low blood pressure and slow heart rate
Requires periodic liver function monitoring
Tablet and capsule forms are not interchangeable
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