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baclofen

Sold as Lyvispah, Fleqsuvy, Gablofen, Lioresal, Ozobax. First FDA approval 11/22/1977: 49 years on the US market.

This grade answers one narrow question: how strong is the public evidence and safety record behind this drug, and how clean is its money trail and court record? It is not a verdict on whether the drug is right for you.

B

Score breakdown (83/100)

Safety ×35%
A
Evidence ×25%
D
Regulatory ×15%
A
Money & lawsuits ×15%
B
Options ×10%
C

Safety: 100

Evidence: 58

Regulatory history: 90

Money & lawsuits: 85

Options: 70

Independent reviews and post-approval warnings

WHO Essential Medicine

Listed on the WHO Model List of Essential Medicines: a global expert panel judged it among the medicines a health system should always have, on evidence of value, not marketing.

What the FDA label says

Approved uses

Baclofen is indicated for the treatment of spasticity resulting from multiple sclerosis, particularly for the relief of flexor spasms and concomitant pain, clonus, and muscular rigidity. Baclofen may also be of some value in patients with spinal cord injuries and other spinal cord diseases. Limitations of Use Baclofen is not indicated in the treatment of skeletal muscle spasm resulting from rheumatic disorders. Baclofen is a gamma-aminobutyric acid (GABA-ergic) agonist indicated for the treatment of spasticity resulting from multiple sclerosis, particularly for the relief of flexor spasms and concomitant pain, clonus, and muscular rigidity. ( 1 ) Baclofen may also be of some value in patients with spinal cord injuries and other spinal cord diseases. ( 1 ) Limitations of Use Baclofen is not indicated in the treatment of skeletal muscle spasm resulting from rheumatic disorders. ( 1 )

Contraindications

Baclofen oral suspension is contraindicated in patients with hypersensitivity to baclofen. Hypersensitivity to baclofen ( 4 )

Warnings and precautions

Abrupt discontinuation of baclofen has resulted in serious adverse reactions including death; therefore, reduce the dosage slowly when baclofen is discontinued. ( 5.1 ) Neonatal withdrawal symptoms can occur; gradually reduce the dosage and discontinue baclofen before delivery. ( 5.2 ) Baclofen can cause drowsiness and sedation. Patients should avoid the operation of automobiles or other dangerous machinery until they know how the drug affects them. Advise patients that the central nervous system effects of baclofen may be additive to those of alcohol and other CNS depressants. ( 5.3 ) Baclofen can cause exacerbation of the following: psychotic disorders, schizophrenia, or confusional states; autonomic dysreflexia; epilepsy. Use with caution in patients with these conditions. ( 5.5 , 5.6 , 5.7 ) 5.1 Adverse Reactions from Abrupt Withdrawal of Baclofen Abrupt discontinuation of baclofen, regardless of the cause, has resulted in adverse reactions that include hallucinations, seizures, high fever, altered mental status, exaggerated rebound spasticity, and muscle rigidity, that in rare cases has advanced to rhabdomyolysis, multiple organ-system failure, and death. Therefore, reduce the...

Adverse reactions (label)

The following clinically significant adverse reactions are described elsewhere in the labeling: Adverse Reactions from Abrupt Withdrawal of Baclofen [see Warnings and Precautions ( 5.1 )] Neonatal Withdrawal Symptoms [see Warnings and Precautions ( 5.2 )] Drowsiness and Sedation [see Warnings and Precautions ( 5.3 )] Poor Tolerability in Stroke Patients [see Warnings and Precautions ( 5.4 )] Exacerbation of Psychotic Disorders, Schizophrenia, or Confusional States [see Warnings and Precautions ( 5.5 )] Exacerbation of Autonomic Dysreflexia [see Warnings and Precautions ( 5.6 )] Exacerbation of Epilepsy [see Warnings and Precautions ( 5.7 )] Posture and Balance Effects [see Warnings and Precautions ( 5.8 )] Ovarian Cysts [see Warnings and Precautions ( 5.9 )] The most common (up to 15% or more) adverse reactions in patients were drowsiness, dizziness, and weakness. ( 6.1 ) To report SUSPECTED ADVERSE REACTIONS, contact Wilshire Pharmaceuticals at 1-877-495-6856 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch. 6.1 Clinical Trials Experience Because clinical trials are conducted under widely varying conditions, adverse reaction rates observed in the clinical trials of a drug cannot b...

Recent major label changes

Dosage and Administration ( 2.3 ) 4/2024

Source: FDA SPL label for Baclofen (Wilshire Pharmaceuticals, Inc.), effective 20251216. Full label on DailyMed.

Side-effect reports sent to the FDA

These are counts of reports people filed, not rates of harm. Anyone can file one, and nobody checks whether the drug was the cause. Millions of doses are taken for every report sent, so the useful part is how this drug compares with the average across all drugs.

80,915reports that mention this drug
80,706of those blame this drug, not another one the person was taking
66%of reports describe a serious outcome, such as a hospital stay (average for all drugs: 57%)
7.2%of reports include a death, from any cause (average for all drugs: 9.1%)

Problems reported most often

Fatigue · 5,569Pain · 5,490Drug Ineffective · 5,224Fall · 5,000Nausea · 4,109Off Label Use · 4,103Headache · 3,940Gait Disturbance · 3,782Muscle Spasticity · 3,478Muscle Spasms · 3,180Urinary Tract Infection · 3,170Dizziness · 3,135Asthenia · 2,961Multiple Sclerosis Relapse · 2,776Diarrhoea · 2,724

Reports per year

20192020202120222023202420252026
7,4776,6526,1525,6785,9664,4574,2992,062

2,068 reports blaming this drug for every million Medicare prescriptions filled, which is 0.7× the typical drug on this site. (10,718 reports in 2024–2026, against 5,181,892 Medicare fills in one year. This is the one number here that accounts for how many people take the drug.)

Source: the FDA's Adverse Event Reporting System (FAERS). Reports are voluntary and unverified. Drugs that are prescribed a lot, in the news, or in lawsuits attract more reports, so the percentages are compared with the whole database to correct for that partly, not fully.

Recalls and regulatory record

1recall actions on file
7 / 40brand / generic applications
2label changes since 2021
NoREMS program
DateClassFirmReason
11/2025Class IIGolden State Medical Supply Inc.Presence of Foreign Tablets/Capsules

Class I = reasonable probability of serious harm. Class II = temporary or reversible harm. Class III = unlikely to harm. Most generic recalls are manufacturing or labeling defects for one lot, not a verdict on the molecule.

Evidence base

167randomized trials (PubMed)
46systematic reviews
148registered trials
30%of completed trials posted results
17%terminated or withdrawn
22%industry-funded

Independent Cochrane reviews

Counts measure how much evidence exists and how transparent it is, not how big the benefit is. For that, ask your prescriber: if 100 people like me took this, how many would get better because of it, and how many would be harmed? (Doctors call these the "number needed to treat" and "number needed to harm.") It differs by condition and is the number drug ads leave out. Sources: PubMed, ClinicalTrials.gov.

Money and lawsuits

In 2024, drug companies reported $113,290 in payments to US physicians and hospitals tied to this drug across 533 transactions (Gablofen $111,536, Ozobax $1,739, Lyvispah $15).

No pending federal MDL names this drug or its brands.

Not named in any federal pharmaceutical settlement of $100M or more on record.

Sources: CMS Open Payments (Sunshine Act); Judicial Panel on Multidistrict Litigation pending docket list; DOJ settlements as tabulated on Wikipedia with links to the primary record. State-court and individual suits are not included.

Who takes it and what it costs

1,358,598Medicare Part D patients (2024)
5,181,892prescriptions filled
$17average cost per fill
$89Mtotal Medicare spend
ProductFills$/fill
Baclofen5,180,407$17
Lyvispah846$193
Lioresal Intrathecal331$1,223
Fleqsuvy176$2,185
Gablofen108$1,215
Ozobax Ds24$1,330

Same-class alternatives

No same-class alternatives found in RxClass.

Questions to ask your prescriber

  1. The most-reported problems in FDA's adverse event data are fatigue, pain, fall. How would we recognize and handle those?
  2. Off-label use is among the most-reported items for this drug. Is my use on-label, and if not, what evidence supports it?
  3. What result are we expecting, by when, and what is the plan if it does not happen?
  4. If 100 people like me took this drug, how many would actually get better because of it, and how many would be harmed by it? (Doctors call these the number needed to treat and the number needed to harm.)