Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
ELETRIPTAN HYDROBROMIDE vs SUMATRIPTAN
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
Selective 5-HT1B/1D receptor agonist; causes vasoconstriction of cranial arteries and inhibition of trigeminal nerve transmission.
Selective 5-HT1B/1D receptor agonist; causes vasoconstriction of cranial arteries and inhibits trigeminal nerve transmission.
Acute treatment of migraine with or without aura in adults
Acute treatment of migraine with or without aura,Acute treatment of cluster headache episodes
40 mg orally once, may repeat after 2 hours if headache recurs; maximum 80 mg/day.
Sumatriptan is available as oral tablets (25 mg, 50 mg, 100 mg), subcutaneous injection (6 mg/0.5 m L), and nasal spray (5 mg, 20 mg). For acute migraine: oral: 50-100 mg at onset, may repeat after 2 hours (max 200 mg/day). Subcutaneous: 6 mg at onset, may repeat after 1 hour (max 12 mg/24h). Nasal spray: 20 mg in one nostril at onset, may repeat after 2 hours (max 40 mg/day).
Terminal elimination half-life is approximately 4-5 hours in healthy adults. In patients with hepatic impairment, half-life may be prolonged up to 8 hours. The half-life supports a clinical duration suitable for acute migraine treatment, with no accumulation with single doses.
2.5 hours (range 1–4 h); clinically relevant for redosing interval of ≥2 h.
Primarily metabolized by CYP3A4; also minor contribution from CYP2C9, CYP2C19, and CYP2D6.
Primarily via monoamine oxidase A (MAO-A); minor via cytochrome P450 (CYP) enzymes.
Approximately 90% of the dose is eliminated in feces, with less than 10% recovered in urine. Renal excretion accounts for about 9% of total clearance, primarily as unchanged drug. Biliary/fecal elimination is the major route.
60% renal (as indole acetic acid metabolite), 40% fecal; <3% unchanged in urine.
Approximately 85% bound to plasma proteins, primarily albumin and alpha-1-acid glycoprotein.
14–21%, primarily to albumin and alpha-1-acid glycoprotein.
Volume of distribution is approximately 1.4 L/kg (range 1.0-2.0 L/kg), indicating extensive distribution into tissues beyond total body water.
2.0–3.3 L/kg; indicates extensive tissue distribution.
Oral bioavailability is approximately 50% (range 30-70% due to first-pass metabolism) for the tablet formulation. Absolute bioavailability is moderate due to presystemic clearance.
Oral: 15% (due to first-pass metabolism); subcutaneous: 97%; intranasal: 17% (with variability).
No dose adjustment required for mild to moderate renal impairment; contraindicated in severe renal impairment (Cr Cl <10 m L/min).
No specific dose adjustment is recommended for renal impairment. However, sumatriptan and its metabolites are excreted renally, and caution is advised in severe renal impairment (Cr Cl <15 m L/min). No specific GFR-based guidelines are established.
Contraindicated in severe hepatic impairment (Child-Pugh C); no adjustment for mild to moderate impairment.
Contraindicated in severe hepatic impairment (Child-Pugh C). For mild to moderate hepatic impairment (Child-Pugh A or B): oral maximum dose is 50 mg; nasal spray: 5 mg single dose; subcutaneous: no specific adjustment, but caution advised due to reduced clearance.
Not established; safety and efficacy in patients <18 years not studied.
Not approved for pediatric use <18 years. However, off-label: adolescent (12-17 years): oral 25-100 mg at onset, may repeat after 2 hours (max 200 mg/day). Subcutaneous: 3-6 mg at onset (based on weight, e.g., 0.06 mg/kg). Nasal spray: 5-20 mg at onset.
Use with caution due to potential decreased hepatic/renal function; consider lower starting dose (20 mg).
Limited data in elderly. Start with the lowest effective dose (e.g., oral 25 mg, subcutaneous 3 mg, nasal spray 5 mg). Caution due to potential for cardiovascular risk, hypertension, and reduced hepatic/renal function. Avoid in patients with uncontrolled hypertension or ischemic heart disease.
No FDA boxed warning.
Not recommended for use in patients with risk factors for coronary artery disease (e.g., hypertension, diabetes, smoking) unless a cardiovascular evaluation confirms absence of coronary artery disease.
Coronary artery vasospasm and ischemic heart disease,Cerebrovascular events (stroke, transient ischemic attack),Life-threatening serotonin syndrome (especially with SSRIs/SNRIs),Hypertensive crisis in patients with uncontrolled hypertension,Risk of myocardial ischemia in patients with risk factors
Risk of myocardial ischemia, infarction, and Prinzmetal's angina,Life-threatening serotonin syndrome with concomitant serotonergic drugs,Elevations in blood pressure,Increased risk of cerebrovascular events,Overuse headache with frequent use
History of ischemic heart disease or coronary artery vasospasm,Uncontrolled hypertension,Hemiplegic or basilar migraine,Use within 24 hours of another triptan or ergotamine,Concurrent use of MAO inhibitors or within 2 weeks of discontinuation,Severe hepatic impairment (Child-Pugh C)
Ischemic heart disease,History of myocardial infarction,Uncontrolled hypertension,Hemiplegic or basilar migraine,Concomitant use of MAO-A inhibitors or within 2 weeks of discontinuation,Severe hepatic impairment,Hypersensitivity to sumatriptan
Grapefruit and grapefruit juice should be avoided as they inhibit CYP3A4, increasing eletriptan exposure and risk of adverse effects. No other significant food interactions reported.
No significant food interactions. Avoid alcohol during migraine attacks as it can worsen headaches. May be taken with or without food.
Limited human data; animal studies show no teratogenicity at clinically relevant doses. First trimester: risk cannot be excluded; second/third trimester: no known increased risk. Avoid in third trimester due to possible uterine atony or decreased placental perfusion.
FDA Pregnancy Category C. In first trimester, no increased risk of major congenital malformations from available data; however, animal studies show embryo lethality and increased malformations at high doses. Second and third trimester risks include potential for uterine hypertonus and fetal hypoxia during maternal use for migraine attacks; avoid during third trimester due to risk of premature uterine contractions.
Excreted into breast milk in low amounts (M/P ratio unknown). Relative infant dose estimated at <1% of maternal weight-adjusted dose. Considered compatible with breastfeeding; monitor infant for irritability and sleep disturbance.
Sumatriptan is excreted into human breast milk with a relative infant dose of 3.5% of maternal weight-adjusted dose (M/P ratio approximately 0.6-4.3). Clinical studies show no adverse effects in breastfed infants; however, wait at least 12 hours after injection or 24 hours after oral dose to breastfeed to minimize exposure.
No specific dose adjustment recommended; pharmacokinetic changes in pregnancy (increased volume of distribution, clearance) may reduce efficacy, but standard dosing remains safe. Consider lowest effective dose.
No specific dose adjustments required for pregnancy based on pharmacokinetic changes; however, lower starting doses may be considered due to increased sensitivity to vascular effects. Avoid use in preeclampsia or uncontrolled hypertension.
Eletriptan has higher lipophilicity and longer half-life than sumatriptan, potentially offering better CNS penetration and sustained efficacy. Contraindicated within 24 hours of other triptans or ergotamines. Avoid in patients with severe hepatic impairment (Child-Pugh C) as metabolism is CYP3A4-dependent. Maximum single dose 40 mg; may repeat after 2 hours if no response, but do not exceed 80 mg/day. Onset typically within 30 minutes; if first dose fails, consider alternative therapy for subsequent attacks.
Sumatriptan is a 5-HT1B/1D receptor agonist used for acute migraine. It is available in oral, nasal, subcutaneous, and rectal formulations. Onset of action is fastest with subcutaneous injection (10-15 minutes). Avoid use within 24 hours of other triptans or ergot alkaloids. Contraindicated in patients with ischemic heart disease, cerebrovascular disease, uncontrolled hypertension, or hemiplegic/basilar migraine. Monitor for serotonin syndrome when combined with SSRIs/SNRIs.
Take at the first sign of migraine headache, not for prevention.,Do not take more than 80 mg in 24 hours; wait at least 2 hours between doses.,Avoid taking within 24 hours of other triptans or ergotamine medications.,Report chest pain, palpitations, or shortness of breath immediately.,Do not use if you have uncontrolled high blood pressure, coronary artery disease, or history of stroke.,Grapefruit juice may increase drug levels; avoid consumption during treatment.,Swallow tablet whole; do not crush or chew.
Take sumatriptan at the first sign of migraine headache for best results.,Do not exceed the recommended dose: maximum 100 mg orally or 20 mg intranasally per single dose, with a maximum of 200 mg daily for oral formulations.,Seek emergency medical attention if you experience chest pain, shortness of breath, irregular heartbeat, or signs of stroke.,Avoid driving or operating machinery until you know how sumatriptan affects you, as it may cause dizziness or drowsiness.,Inform your doctor if you have heart disease, high blood pressure, or are pregnant or breastfeeding.
"Eletriptan, a 5-HT1B/1D receptor agonist used for migraine, and ondansetron, a 5-HT3 receptor antagonist antiemetic, both increase serotonergic activity via different mechanisms. Concurrent use may lead to excessive serotonin accumulation, potentially triggering serotonin syndrome, characterized by neuromuscular excitation, autonomic instability, and altered mental status. While the interaction is mechanistically plausible, clinical reports are rare, and caution is advised particularly in patients on multiple serotonergic agents."
"Concomitant use of eletriptan, a 5-HT1B/1D receptor agonist, with maprotiline, a tetracyclic antidepressant that inhibits serotonin reuptake, may result in additive serotonergic effects. This increases the risk of serotonin syndrome, a potentially life-threatening condition characterized by neuromuscular excitation, autonomic instability, and altered mental status. Patients combining these agents require close monitoring for symptoms such as hyperthermia, clonus, hyperreflexia, and agitation."
"Concomitant use of eletriptan and almotriptan, both triptan-class 5-HT1B/1D receptor agonists, increases the risk of serotonin syndrome and additive vasoconstriction, including coronary vasospasm. Excessive serotonergic activity may lead to neuromuscular excitation, autonomic instability, and altered mental status, while additive arterial vasoconstriction can precipitate severe hypertension or ischemic events, especially in patients with cardiovascular risk factors."
"Concurrent use of sumatriptan, a serotonin 5-HT1B/1D receptor agonist, and rasagiline, a selective monoamine oxidase B (MAO-B) inhibitor, can lead to serotonin syndrome due to excessive serotonergic activity in the central nervous system. Rasagiline inhibits the metabolism of serotonin, while sumatriptan indirectly increases serotonin release; their combination may result in life-threatening neuromuscular excitation, autonomic instability, and altered mental status. Symptoms may include hyperthermia, rigidity, myoclonus, and rapid fluctuations in vital signs, requiring immediate medical intervention."
"Sumatriptan, a 5-HT1B/1D receptor agonist used for migraine, and sulpiride, a dopamine D2 receptor antagonist with atypical antipsychotic properties, may exhibit additive or synergistic effects on the central nervous system. This combination can potentially increase the risk of serotonin syndrome (due to sumatriptan's serotonergic activity) and may also lead to enhanced extrapyramidal symptoms or neuroleptic malignant syndrome via combined dopaminergic antagonism. Clinical outcomes may include hyperthermia, rigidity, altered mental status, and autonomic instability."
"The combination of sumatriptan (a 5-HT1B/1D receptor agonist) and paroxetine (a selective serotonin reuptake inhibitor) increases the risk of serotonin syndrome, a potentially life-threatening condition characterized by neuromuscular excitation, autonomic instability, and altered mental status. This interaction is due to additive serotonergic effects, as both drugs enhance serotonin activity in the central nervous system. Clinical outcomes range from mild symptoms (tremor, hyperreflexia, diaphoresis) to severe manifestations (hyperthermia, rigidity, seizures) and require immediate medical attention."
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about ELETRIPTAN HYDROBROMIDE vs SUMATRIPTAN, answered by our medical review team.
ELETRIPTAN HYDROBROMIDE is a 5-HT1 Agonist that works by Selective 5-HT1B/1D receptor agonist; causes vasoconstriction of cranial arteries and inhibition of trigeminal nerve transmission.. SUMATRIPTAN is a 5-HT1 Agonist that works by Selective 5-HT1B/1D receptor agonist; causes vasoconstriction of cranial arteries and inhibits trigeminal nerve transmission.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between ELETRIPTAN HYDROBROMIDE and SUMATRIPTAN depend on the specific clinical indication. These are both 5-HT1 Agonist agents and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of ELETRIPTAN HYDROBROMIDE is: 40 mg orally once, may repeat after 2 hours if headache recurs; maximum 80 mg/day.. The standard adult dose of SUMATRIPTAN is: Sumatriptan is available as oral tablets (25 mg, 50 mg, 100 mg), subcutaneous injection (6 mg/0.5 m L), and nasal spray (5 mg, 20 mg). For acute migraine: oral: 50-100 mg at onset, may repeat after 2 hours (max 200 mg/day). Subcutaneous: 6 mg at onset, may repeat after 1 hour (max 12 mg/24h). Nasal spray: 20 mg in one nostril at onset, may repeat after 2 hours (max 40 mg/day).. 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 ELETRIPTAN HYDROBROMIDE and SUMATRIPTAN 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. ELETRIPTAN HYDROBROMIDE is classified as Category D/X. Limited human data; animal studies show no teratogenicity at clinically relevant doses. First trimester: risk cannot be excluded; second/third trimester: no known increased risk. A. SUMATRIPTAN is classified as Category D/X. FDA Pregnancy Category C. In first trimester, no increased risk of major congenital malformations from available data; however, animal studies show embryo lethality and increased m. Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.