baclofen vs tizanidine
Side-by-side comparison of baclofen and tizanidine Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
Lioresal, Gablofen
Zanaflex
Baclofen is a muscle relaxant. It helps to relieve muscle spasms and stiffness.
Tizanidine is a muscle relaxant. It is used to treat spasticity, which is when your muscles are tight or stiff.
Baclofen is used to treat muscle spasticity (stiffness) caused by multiple sclerosis. It can help with muscle spasms, pain, and rigidity. It may also help people with spinal cord injuries or diseases. Baclofen is not for muscle spasms caused by arthritis or other rheumatic problems.
Tizanidine is used to treat spasticity in adults. Spasticity is a condition where your muscles become stiff or tight. This medicine helps to relax your muscles and reduce the stiffness. It can help you move and feel more comfortable.
Baclofen works by affecting the nerves in your spinal cord. It decreases the signals that cause your muscles to tighten. This helps to relieve muscle stiffness and spasms.
Tizanidine works by affecting certain chemicals in your brain. It is an alpha-2 adrenergic agonist. This action helps to reduce muscle spasms and tightness.
- • Drowsiness
- • Dizziness
- • Weakness
- • Nausea
- • Dry mouth
- • Sleepiness
- • Weakness
- • Dizziness
- Tiredness 6,148
- Pain 5,657
- Medicine not working 5,452
- Fall 5,421
- Feeling sick to your stomach 4,595
- Tiredness 1,693
- Aches 1,615
- Medicine not working 1,572
- Feeling sick to your stomach 1,530
- Falling down 1,318
If you stop taking baclofen suddenly, you may experience withdrawal symptoms. Talk to your doctor before stopping this medication.
Tizanidine can cause low blood pressure, liver problems, and hallucinations. It can also make you very sleepy, especially if you drink alcohol or take other medicines that cause sleepiness. Your doctor should check your liver function before you start taking tizanidine and one month after you reach your highest dose. Do not stop taking tizanidine suddenly, as this can cause withdrawal symptoms.
Tell your doctor if you are pregnant, plan to become pregnant, or are breastfeeding. It is not known if baclofen will harm your unborn baby. Baclofen can pass into breast milk.
Tizanidine may harm your unborn baby. Talk to your doctor if you are pregnant or plan to become pregnant. It is not known if tizanidine passes into breast milk, so talk to your doctor if you are breastfeeding.
How to Read This baclofen vs tizanidine Comparison
baclofen is classified in the GABA-B Agonist (Muscle Relaxant) drug class, while tizanidine sits within the Central Alpha-2 Agonist (Muscle Relaxant) class. Drugs from different classes work through distinct mechanisms, so a head-to-head comparison illustrates trade-offs rather than equivalence. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, baclofen has 27,273 submissions while tizanidine has 7,728. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. No direct interaction between these two drugs is listed in our FDA-derived dataset, though co-prescription still warrants pharmacist review. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between baclofen and tizanidine — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.