Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
BACLOFEN vs REGRANEX
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
GABA-B receptor agonist; inhibits monosynaptic and polysynaptic spinal reflexes by hyperpolarizing afferent terminals.
Recombinant human platelet-derived growth factor (rh PDGF-BB) that promotes chemotaxis and proliferation of fibroblasts, smooth muscle cells, and other cells involved in wound healing, and stimulates granulation tissue formation.
Spasticity due to multiple sclerosis (FDA approved),Spinal cord injury (FDA approved),Intrathecal use for severe spasticity of cerebral origin (off-label),Hiccups (off-label),Alcohol withdrawal syndrome (off-label),Trigeminal neuralgia (off-label)
Treatment of lower extremity diabetic neuropathic ulcers that extend into the subcutaneous tissue or beyond and have adequate blood supply.,Off-label: pressure ulcers, venous stasis ulcers, other chronic wounds.
Initial: 5 mg orally 3 times daily; increase by 5 mg per dose every 3 days to max 80 mg/day (20 mg 4 times daily). Intrathecal: initial test dose 50-100 mcg; for continuous infusion, daily dose typically 300-800 mcg.
Apply topically once daily, a thin layer to the full area of the ulcer, using a measured amount of gel based on ulcer length and width in centimeters: (length × width × 0.5) grams.
Terminal half-life: 2.5-4 hours (young adults), 4-8 hours (elderly); clinical context: requires frequent dosing for spasticity.
Terminal half-life ~30-60 minutes after topical application; prolonged in renal impairment (up to 2-3 hours). Clinical context: Short systemic exposure limits off-target effects.
Metabolized via hepatic deamination by transaminase; primarily excreted unchanged in urine (approximately 70-80%), with minor hepatic metabolism.
Metabolized locally; no systemic metabolism expected due to topical administration and minimal absorption. If absorbed, degraded by proteolytic enzymes at the wound site.
Renal: 70-80% unchanged; fecal: <5%; biliary: minimal.
Primarily renal; minimal biliary/fecal. Becaplermin is cleared renally (>90% as metabolites) with <2% excreted unchanged. Fecal elimination accounts for <10%.
30-35% bound to albumin.
~25% bound to plasma proteins (primarily albumin).
Vd: 0.5-0.7 L/kg; indicates distribution into total body water.
Vd ~12 L (~0.17 L/kg assuming 70 kg), indicating limited extravascular distribution due to molecular size.
Oral: 70-85% with high variability; intrathecal: 100%.
Topical: Negligible systemic bioavailability (<1% of applied dose absorbed; increased with large wounds or impaired skin barrier).
Cr Cl 30-50 m L/min: reduce dose by 50%; Cr Cl <30 m L/min: avoid use or use with extreme caution, reduce dose by 75%.
No dose adjustment required for renal impairment.
No specific guidelines; use with caution due to potential for increased sedation/neurotoxicity.
No dose adjustment required for hepatic impairment.
Children 2-7 years: initial 2.5 mg orally 4 times daily, increase by 2.5 mg/dose every 3 days to max 40 mg/day; children ≥8 years: initial 5 mg orally 3 times daily, increase as in adults to max 60 mg/day.
Safety and efficacy in pediatric patients have not been established; use not recommended.
Start at low end of dosing range (5 mg twice daily), titrate slowly due to increased risk of sedation, weakness, and cognitive impairment.
No specific dose adjustment recommended; use with caution due to potential comorbidities and polypharmacy.
Abrupt discontinuation may cause withdrawal symptoms including hallucinations, seizures, and life-threatening hyperpyrexia; taper dose gradually.
Increased risk of mortality secondary to malignancy in patients treated with 3 or more tubes of REGRANEX (becaplermin) Gel. A postmarketing study showed increased mortality from cancer in patients who used three or more tubes of REGRANEX compared to control patients. REGRANEX should only be used when the benefits can be expected to outweigh the risks. REGRANEX is not recommended in patients with known malignancy.
May cause CNS depression (drowsiness, sedation) and impair ability to drive or operate machinery.,Risk of withdrawal syndrome including fever, altered mental status, and autonomic instability upon abrupt cessation.,Use with caution in patients with renal impairment; dose adjustment required.,May exacerbate psychiatric disorders; monitor for hallucinations, confusion.,Risk of respiratory depression when combined with other CNS depressants.
Application to wounds with active malignancy may promote tumor growth. Application to wounds with infection or necrotic tissue should be discontinued until infection is controlled or necrotic tissue debrided. Potential for immunogenicity.
Hypersensitivity to baclofen.,Intrathecal formulation is contraindicated in patients with active infection or bleeding disorders at lumbar puncture site.,Women who are breastfeeding (relative contraindication).
Known hypersensitivity to becaplermin or any product component. Application to wounds with known neoplasms or active malignancy. Use on wounds closed by primary intention.
No specific food interactions. Avoid alcohol due to additive CNS depression.
No known food interactions. Regranex is applied topically and has minimal systemic absorption.
First trimester: Limited human data; animal studies show increased fetal malformations (omphalocele, exencephaly) at doses equivalent to human therapeutic range. Second and third trimesters: Risk of neonatal withdrawal (hypertonia, seizures) with chronic maternal use. Avoid unless benefit outweighs risk.
No adequate and well-controlled studies in pregnant women. Animal studies at doses 25-100 times human exposure show no fetal harm. Risk cannot be ruled out; use only if potential benefit justifies potential risk.
Baclofen excreted into breast milk in low concentrations (M/P ratio approximately 0.43). Relative infant dose estimated 0.9% of maternal weight-adjusted dose. Considered compatible with breastfeeding, but monitor infant for sedation and hypotonia.
It is not known whether becaplermin is excreted in human milk. M/P ratio unknown. Use caution; consider developmental and health benefits of breastfeeding along with mother's clinical need for REGRANEX.
No specific dose adjustments recommended. Increased renal blood flow and GFR in pregnancy may reduce baclofen levels; monitor clinical effect and adjust dose as needed. Avoid abrupt discontinuation due to risk of maternal withdrawal and rebound spasticity.
No pharmacokinetic data in pregnancy. Dosage adjustments are not recommended based on current knowledge; use same dosing as non-pregnant adults.
Abrupt withdrawal can cause severe rebound spasticity, fever, and rhabdomyolysis; taper by 5-10 mg/week. Intrathecal baclofen pumps require careful monitoring for overdose (respiratory depression) or withdrawal. Use with caution in renal impairment (dose adjust for Cr Cl <30 m L/min).
Regranex (becaplermin) is a recombinant platelet-derived growth factor (PDGF) gel indicated for diabetic neuropathic ulcers extending into subcutaneous tissue or deeper. Ensure ulcer is free of infection, necrotic tissue, and has adequate blood supply before initiating therapy. Apply a thin layer once daily, and recalibrate gel amount based on ulcer dimensions (length x width x 0.5 for cm to grams). Do not use on wounds with exposed bone, tendon, or joint. Monitor for increased risk of malignancy; contraindicated in patients with active malignancies. The gel is for single-patient use only; discard tube 30 days after opening.
Do not stop taking baclofen suddenly; sudden discontinuation can cause serious withdrawal symptoms including hallucinations, seizures, and high fever.,Avoid alcohol and CNS depressants as they increase sedation and risk of falls.,May cause dizziness or drowsiness; avoid driving or operating machinery until you know how it affects you.,Take exactly as prescribed; missed doses can lead to muscle spasms or withdrawal.,Report any unusual muscle stiffness, rapid heart rate, or dark urine immediately.
Wash hands before and after applying Regranex.,Clean the ulcer gently with saline or water before each application.,Apply a thin layer of gel (about 1/16 inch) to the entire ulcer area once daily.,Cover the ulcer with a saline-moistened gauze dressing after applying gel.,Do not use more than the prescribed amount or frequency.,Store Regranex in the refrigerator; do not freeze.,Discard any unused gel in the tube 30 days after first opening.,Report any signs of infection (increased pain, redness, swelling, foul odor) or new skin changes around the wound.,You may need to have your wound measured weekly to adjust the gel amount.,Avoid applying other creams, ointments, or lotions to the same area.
"Sevoflurane enhances the inhibitory effects of baclofen on the central nervous system by potentiating GABA-B receptor activity, leading to an increased risk of profound sedation, respiratory depression, and hypotension. This synergistic interaction can result in prolonged recovery from anesthesia and the need for ventilatory support. Clinically, patients may exhibit exaggerated muscle relaxation and a delayed emergence from anesthesia, particularly at higher doses of either agent."
"Concomitant use of etidocaine, an amide-type local anesthetic that blocks voltage-gated sodium channels, and baclofen, a GABAB receptor agonist used for muscle spasticity, may lead to additive central nervous system (CNS) depression and respiratory depression. This interaction results from synergistic depressant effects on the brainstem and spinal cord, increasing the risk of sedation, dizziness, ataxia, and impaired consciousness. Clinically, patients may experience excessive drowsiness, respiratory compromise, and impaired motor coordination, particularly in the elderly or those with pre-existing renal impairment where baclofen accumulation is more likely."
"The coadministration of Baclofen and Metaxalone results in additive central nervous system (CNS) depression due to their shared pharmacodynamic effects on GABAergic and sedative pathways. This combination can potentiate sedation, dizziness, ataxia, and respiratory depression, particularly in elderly patients or those with renal impairment. Clinical outcomes may include increased risk of falls, cognitive impairment, and impaired motor coordination, necessitating cautious dose titration."
No interactions on record
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about BACLOFEN vs REGRANEX, answered by our medical review team.
BACLOFEN is a Skeletal Muscle Relaxant that works by GABA-B receptor agonist; inhibits monosynaptic and polysynaptic spinal reflexes by hyperpolarizing afferent terminals.. REGRANEX is a Topical Growth Factor (Platelet-Derived) that works by Recombinant human platelet-derived growth factor (rh PDGF-BB) that promotes chemotaxis and proliferation of fibroblasts, smooth muscle cells, and other cells involved in wound healing, and stimulates granulation tissue formation.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between BACLOFEN and REGRANEX depend on the specific clinical indication. These are agents from distinct pharmacological classes and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of BACLOFEN is: Initial: 5 mg orally 3 times daily; increase by 5 mg per dose every 3 days to max 80 mg/day (20 mg 4 times daily). Intrathecal: initial test dose 50-100 mcg; for continuous infusion, daily dose typically 300-800 mcg.. The standard adult dose of REGRANEX is: Apply topically once daily, a thin layer to the full area of the ulcer, using a measured amount of gel based on ulcer length and width in centimeters: (length × width × 0.5) grams.. Dosing should always be individualized based on indication, renal and hepatic function, age, and other patient factors.
No direct drug-drug interaction has been formally documented between BACLOFEN and REGRANEX in current clinical databases. However, individual patient risk factors including other medications, organ function, and comorbidities should always be evaluated by a qualified healthcare provider.
The maternal-fetal safety profiles differ. BACLOFEN is classified as Category C. First trimester: Limited human data; animal studies show increased fetal malformations (omphalocele, exencephaly) at doses equivalent to human therapeutic range. Second and third t. REGRANEX is classified as Category C. No adequate and well-controlled studies in pregnant women. Animal studies at doses 25-100 times human exposure show no fetal harm. Risk cannot be ruled out; use only if potential b. Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.