Flexeril vs. Baclofen
See how Flexeril and Baclofen compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Flexeril is approved for short-term muscle spasm from injury or strain, while baclofen is approved for spasticity from conditions like multiple sclerosis and spinal cord injury.
Both drugs commonly cause drowsiness and dizziness, but baclofen's drowsiness rate is notably higher and it requires a gradual dose increase over about ten days.
Flexeril is meant for use of only two to three weeks, while baclofen is often taken long-term and must be tapered off slowly to avoid dangerous withdrawal effects.
Flexeril vs. Baclofen Drug Summary
Flexeril
Flexeril (cyclobenzaprine) is a skeletal muscle relaxant chemically related to tricyclic antidepressants, used short-term for muscle spasm caused by acute injury or strain. It is taken as an oral tablet, typically three times a day, alongside rest and physical therapy.
Baclofen
Baclofen is a GABA-B receptor agonist used to treat spasticity from multiple sclerosis, spinal cord injury, or other spinal cord disease. It comes in tablets, oral liquid, and an intrathecal pump form, and oral dosing is built up gradually over about ten days.
Flexeril vs. Baclofen Side Effects
Flexeril
Baclofen
Flexeril vs. Baclofen Dosage
Flexeril
Baclofen
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg three times daily | At the start |
| Maximum dose | 10 mg three times daily | If needed |
| Dose changes | 1 increase | As tolerated |
| 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 |
Flexeril
| STAGE | DOSE | WHEN |
| Starting dose | 5 mg three times daily | At the start |
| Maximum dose | 10 mg three times daily | If needed |
| Dose changes | 1 increase | 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 |
Flexeril vs. Baclofen Indications
Flexeril
Flexeril is FDA-approved as a short-term add-on to rest and physical therapy for muscle spasm caused by acute musculoskeletal injuries like strains and sprains. It is not effective for spasticity caused by brain or spinal cord disease. It is sometimes used off-label for fibromyalgia pain and sleep problems.
Muscle spasm from acute strains or sprains
Used alongside rest and physical therapy
Off-label: fibromyalgia pain and sleep symptoms
Not effective for spasticity from CNS disease
Baclofen
Baclofen is FDA-approved for spasticity caused by multiple sclerosis or spinal cord injury and disease. An intrathecal pump form is used for severe spasticity that does not respond to oral treatment. It is sometimes used off-label to reduce alcohol cravings, treat hiccups, or manage reflux.
Spasticity from multiple sclerosis
Spasticity from spinal cord injury or disease
Severe spasticity via intrathecal pump
Off-label: alcohol cravings, hiccups, reflux
Flexeril vs. Baclofen Pros and Cons
Flexeril
Flexeril works well for short bursts of acute muscle spasm but is not intended for long-term use or for spasticity from nerve or spinal cord conditions. Because brand-name Flexeril is discontinued, patients receive the generic cyclobenzaprine, which is widely available and inexpensive.
Pros
Simple fixed dosing with no titration schedule
Widely available as low-cost generic cyclobenzaprine
No dangerous withdrawal syndrome if stopped abruptly
Cons
Not approved for use beyond 2 to 3 weeks
Ineffective for spasticity from CNS disease
Contraindicated with MAOIs and certain heart conditions
Baclofen
Baclofen is built for longer-term management of spasticity and offers more dosing forms, including an intrathecal option for severe cases. It requires a careful ramp-up and must be tapered rather than stopped suddenly, since abrupt discontinuation can cause serious withdrawal symptoms.
Pros
Approved for long-term spasticity management
Multiple formulations, including liquid and pump
Can treat severe spasticity unresponsive to pills
Cons
Requires multi-day titration before full dose
Abrupt stopping can cause seizures or rebound spasticity
Higher drowsiness rate than Flexeril
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