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Interactions between Ethosuximide and Lumryz

1 drug interaction and 22 additional warnings found for the following 2 drugs:

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Drug interactions

Major drug interactions

Major:

ethosuximide sodium oxybate

Applies to: ethosuximide and Lumryz (sodium oxybate)
Generally avoid

The central nervous system (CNS) and respiratory depressant effects of sodium oxybate, which is the sodium salt of gamma-hydroxybutyrate (GHB), may be potentiated by concomitant use of other agents with CNS depressant effects including sedating antiepileptic drugs. An increased risk of serious adverse reactions such as respiratory depression, hypotension, profound sedation, syncope, and death should be considered.

Adjust dose

Coadministration with inhibitors of the enzyme GHB dehydrogenase may increase systemic exposure of sodium oxybate and other oxybate salts, as the active oxybate moiety is primarily metabolized by this enzyme. In clinical studies, coadministration of immediate-release (IR) sodium oxybate (6 g/day in two equal doses, 4 hours apart) with divalproex sodium (1250 mg valproic acid per day) was associated with a 25% mean increase in systemic exposure (AUC) to sodium oxybate (GHB) and greater impairment on some tests of attention and working memory. However, coadministration of a single dose of extended-release (ER) sodium oxybate (6 g) with divalproex sodium ER at steady-state resulted in an 18% increase in sodium oxybate AUC, which was not expected to be clinically meaningful. Clinical pharmacokinetic data are not available for other GHB-dehydrogenase inhibitors.

Management

Concomitant use of sodium oxybate-containing products with other CNS depressants should be avoided whenever possible. If concomitant use is required, close monitoring and reduction or discontinuation of one of the concomitant CNS depressants should be considered. For patients already stabilized on sodium oxybate IR who are prescribed divalproex sodium, the sodium oxybate dose should be reduced initially by at least 20%. Conversely, for patients already taking divalproex sodium, a lower starting dosage of sodium oxybate IR is recommended. Further dosage adjustments should be made according to patient response and tolerance. Similar dosage adjustments are recommended for other oxybate-containing products, including Xywav, when used concomitantly with divalproex sodium. No specific dosage adjustment is recommended with divalproex sodium for the ER sodium oxybate formulation, Lumryz; however, a pharmacodynamic interaction cannot be ruled out.

References (8)
  1. (2022) "Product Information. Xyrem (sodium oxybate)." UCB Pharma Ltd
  2. (2025) "Product Information. Xywav (calcium/magnesium/potassium/sodium oxybates)." Jazz Pharmaceuticals
  3. (2025) "Product Information. Xyrem (sodium oxybate)." Innomar Strategies Inc
  4. (2026) "Product Information. Sodium Oxybate (Reach) (sodium oxybate)." Reach Pharmaceuticals Pty Ltd
  5. (2024) "Product Information. OXIBATO DE SODIO KALCEKS (oxibato de sodio)." AKCIJU SABIEDRIBA KALCEKS
  6. (2025) "Product Information. Lumryz (sodium oxybate)." Avadel CNS Pharmaceuticals, LLC, v2
  7. (2025) "Product Information. Xyrem (sodium oxybate)." Jazz Pharmaceuticals, v1
  8. (2024) "Product Information. Xywav (calcium/magnesium/potassium/sodium oxybates)." Innomar Strategies Inc

Food/lifestyle interactions

Major food/lifestyle interactions

Major:

sodium oxybate Food/Lifestyle

Applies to: Lumryz (sodium oxybate)
Contraindicated

Alcohol may potentiate the central nervous system (CNS)-depressant effects of sodium oxybate, the sodium salt of gamma-hydroxybutyrate (GHB). This may increase the risk of respiratory depression and other serious adverse reactions, including hypotension, profound sedation, syncope, and death. Similar CNS and respiratory depressant effects may occur with other oxybate-containing products. In addition, alcohol may result in more rapid release of sodium oxybate from the extended-release formulation (Lumryz). In an in vitro study with Lumryz, alcohol-induced dose-dumping was demonstrated at 1 hour in the presence of 40% alcohol, and an approximately 60% increase in sodium oxybate release was observed at 2 hours in the presence of 20% alcohol. This dose-dumping finding was specific to Lumryz.

Adjust dosing interval

Food, particularly a high-fat meal, may delay the absorption and decrease the bioavailability of oxybate-containing products. The magnitude of this effect is formulation dependent. Administration of the extended-release sodium oxybate formulation (Lumryz) immediately after a high-fat meal increased the average time to reach peak plasma concentration (Tmax) from 0.5 hours to 1.5 hours and decreased the peak plasma concentration (Cmax) and systemic exposure (AUC) of GHB by 33% and 14%, respectively. With immediate-release sodium oxybate formulations, administration immediately after a high-fat meal increased Tmax from 0.75 hours to 2 hours and decreased Cmax and AUC of GHB by approximately 58% to 59% and 37%, respectively. The combined formulation containing calcium, magnesium, potassium, and sodium oxybates (Xywav) also demonstrated mean reductions in Cmax and AUC of GHB when administered after a high-fat meal, by 33% and 16%, respectively.

Monitor closely

Single-ingredient formulations of sodium oxybate contain significant amounts of sodium. Additional sodium from the diet may increase the total sodium load. This may increase the risk of complications associated with high sodium intake, such as elevated blood pressure, fluid retention, or worsening heart failure, particularly in patients who are sensitive to sodium intake, including those with hypertension, heart failure, or renal impairment.

Management

Concomitant use of oxybate-containing products with alcohol is contraindicated. Oxybate-containing products should be taken on a consistent schedule, at least 2 hours after eating; for twice-nightly regimens, this applies to the first nightly dose. For patients receiving single-ingredient sodium oxybate formulations, consider the total daily sodium intake throughout treatment. Blood pressure should be monitored and dietary sodium restriction considered as clinically appropriate, particularly in patients with hypertension, heart failure, or renal impairment.

References (8)
  1. (2022) "Product Information. Xyrem (sodium oxybate)." UCB Pharma Ltd
  2. (2025) "Product Information. Xywav (calcium/magnesium/potassium/sodium oxybates)." Jazz Pharmaceuticals
  3. (2025) "Product Information. Xyrem (sodium oxybate)." Innomar Strategies Inc
  4. (2026) "Product Information. Sodium Oxybate (Reach) (sodium oxybate)." Reach Pharmaceuticals Pty Ltd
  5. (2024) "Product Information. OXIBATO DE SODIO KALCEKS (oxibato de sodio)." AKCIJU SABIEDRIBA KALCEKS
  6. (2025) "Product Information. Lumryz (sodium oxybate)." Avadel CNS Pharmaceuticals, LLC, v2
  7. (2025) "Product Information. Xyrem (sodium oxybate)." Jazz Pharmaceuticals, v1
  8. (2024) "Product Information. Xywav (calcium/magnesium/potassium/sodium oxybates)." Innomar Strategies Inc

Moderate food/lifestyle interactions

Moderate:

ethosuximide Food/Lifestyle

Applies to: ethosuximide
Generally avoid

Alcohol may potentiate some of the pharmacologic effects of CNS-active agents. Use in combination may result in additive central nervous system depression and/or impairment of judgment, thinking, and psychomotor skills.

Management

Patients receiving CNS-active agents should be warned of this interaction and advised to avoid or limit consumption of alcohol. Ambulatory patients should be counseled to avoid hazardous activities requiring complete mental alertness and motor coordination until they know how these agents affect them, and to notify their physician if they experience excessive or prolonged CNS effects that interfere with their normal activities.

References (4)
  1. Warrington SJ, Ankier SI, Turner P (1986) "Evaluation of possible interactions between ethanol and trazodone or amitriptyline." Neuropsychobiology, 15, p. 31-7
  2. Gilman AG, eds., Nies AS, Rall TW, Taylor P (1990) "Goodman and Gilman's the Pharmacological Basis of Therapeutics." New York, NY: Pergamon Press Inc.
  3. (2012) "Product Information. Fycompa (perampanel)." Eisai Inc
  4. (2015) "Product Information. Rexulti (brexpiprazole)." Otsuka America Pharmaceutical, Inc.

Disease interactions

20 potential interactions Applies to: 17 conditions, including High Blood Pressure, Depression, Weight Loss, Narcolepsy, and Sleep Apnea.

Alcoholism

Major:

Lumryz

The sodium oxybate in Lumryz has a major potential interaction with Alcoholism.

Sodium oxybate should not be used with alcohol. This drug should be used with caution in patients with history of drug or alcohol abuse. The inappropriate use of this drug alone or in combination with other CNS depressants is associated with CNS adverse reaction including seizures, respiratory depression, decreases in the levels of consciousness, coma and death. Because illicit use and abuse has been reported, physicians should evaluate carefully their patients for history of drug or alcohol abuse and should follow such patients closely, observing them for signs of misuse.

Bone Marrow Depression/Low Blood Counts

Major:

ethosuximide

Ethosuximide has a major potential interaction with Bone Marrow Depression/Low Blood Counts.

Hematologic toxicities, some with fatal outcome, have been associated with the use of succinimide anticonvulsants. Leukopenia, agranulocytosis, aplastic anemia, thrombocytopenia, pancytopenia, and eosinophilia have been reported. Therapy with succinimide anticonvulsants should be administered cautiously in patients with preexisting blood dyscrasias and/or bone marrow suppression. Complete blood counts, including platelets, should be performed prior to initiating therapy and periodically during therapy. Marked depression of blood counts may be indication for withdrawal of succinimide therapy.

Depression

Major:

Lumryz

The sodium oxybate in Lumryz has a major potential interaction with Depression.

A variety of abnormal thinking and behavior changes have been reported to occur in association with the use of most anxiolytics, sedatives and hypnotics. Some of these changes include decreased inhibition, aggressiveness, agitation, and hallucinations. These drugs can cause or exacerbate mental depression and cause suicidal behavior and ideation. Therapy with these drugs should be administered cautiously in patients with a history of depression or other psychiatric disorders. Patients should be monitored for any changes in mood or behavior. It may be prudent to refrain from dispensing large quantities of medication to these patients.

Moderate:

ethosuximide

Ethosuximide has a moderate potential interaction with Depression.

Antiepileptic drugs (AEDs) have been associated with an increased risk of suicidal thoughts or behavior in patients taking these drugs for any indication. Pooled analyses of 199 placebo-controlled clinical studies involving the use of 11 different AEDs showed that patients receiving AEDs had approximately twice the risk of suicidal thinking or behavior compared to patients receiving placebo. AEDs should be administered cautiously in patients with depression or other psychiatric disorders; phentermine-topiramate should be avoided in patients with history of suicidal attempts or active suicidal ideation. The risk of suicidal thoughts and behavior should be carefully assessed against the risk of untreated illness, bearing in mind that epilepsy and many other conditions for which AEDs are prescribed are themselves associated with morbidity and mortality and an increased risk of suicidal thoughts and behavior. Patients, caregivers, and families should be alert to the emergence or worsening of signs and symptoms of depression, any unusual changes in mood or behavior, or the emergence of suicidal thoughts or behavior. If patients have symptoms of suicidal ideation or behavior, a dosage reduction or treatment discontinuation should be considered.

Drug Dependence

Major:

Lumryz

The sodium oxybate in Lumryz has a major potential interaction with Drug Dependence.

Sodium oxybate should not be used with alcohol. This drug should be used with caution in patients with history of drug or alcohol abuse. The inappropriate use of this drug alone or in combination with other CNS depressants is associated with CNS adverse reaction including seizures, respiratory depression, decreases in the levels of consciousness, coma and death. Because illicit use and abuse has been reported, physicians should evaluate carefully their patients for history of drug or alcohol abuse and should follow such patients closely, observing them for signs of misuse.

Glaucoma/Intraocular Hypertension

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Glaucoma/Intraocular Hypertension.

Some hypnotic drugs can have an anticholinergic effect and should be used with caution in patients with glaucoma, and trouble urinating due to retention or enlarged prostate.

Heart Disease

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Heart Disease.

Sodium oxybate has a high content of salt, and it should be used with caution in patients sensitive to salt intake such as patients with heart failure, hypertension, or renal impairment.

Hemodialysis

Moderate:

ethosuximide

Ethosuximide has a moderate potential interaction with Hemodialysis.

Ethosuximide has been shown to be removed by hemodialysis. Doses should either be scheduled for administration after dialysis or supplemental doses be given after dialysis.

High Blood Pressure

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with High Blood Pressure.

Sodium oxybate has a high content of salt, and it should be used with caution in patients sensitive to salt intake such as patients with heart failure, hypertension, or renal impairment.

Hypertensive Heart with CHF and Renal Disease

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Hypertensive Heart with CHF and Renal Disease.

Sodium oxybate has a high content of salt, and it should be used with caution in patients sensitive to salt intake such as patients with heart failure, hypertension, or renal impairment.

Liver Disease

Major:

ethosuximide

Ethosuximide has a major potential interaction with Liver Disease.

Succinimide anticonvulsants have produced morphological and functional changes in the liver of animals. In humans, abnormalities in liver and renal function studies have been reported. Therapy with succinimide anticonvulsants should be administered with extreme caution in patients with known hepatic or renal diseases. Periodic urinalysis and liver function tests are recommended for all patients treated with these drugs.

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Liver Disease.

In general, anxiolytics, sedatives and hypnotics are extensively metabolized by the liver. Their plasma clearance may be decreased and their half-life prolonged in patients with impaired hepatic function. Therapy with these drugs should be administered cautiously in patients with liver disease (some are not recommended in severe liver impairment), and the dosage should be adjusted accordingly. Laboratory testing is recommended prior and during treatment.

Lupus Erythematosus

Major:

ethosuximide

Ethosuximide has a major potential interaction with Lupus Erythematosus.

Cases of systemic lupus erythematosus (SLE) have been reported in association with the use of succinimide anticonvulsants, primarily ethosuximide. Some of the patients recovered promptly following discontinuation of the drug, while others continued to have active disease long after. Therapy with succinimide anticonvulsants should be administered cautiously in patients with a history of SLE.

Narcolepsy

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Narcolepsy.

The use of sodium oxybate may impair the respiratory drive especially in patients with compromised respiratory function. Sodium oxybate should be used cautiously in patients with sleep apnea and sleep-related breathing disorders as there have been reports of increased central apneas and clinically relevant desaturation. Prescribers should be aware that sleep-related disorders tend to be more prevalent in obese patients, postmenopausal women not receiving hormone replacement therapy and also among patients with narcolepsy.

Psychosis

Moderate:

ethosuximide

Ethosuximide has a moderate potential interaction with Psychosis.

Antiepileptic drugs (AEDs) have been associated with an increased risk of suicidal thoughts or behavior in patients taking these drugs for any indication. Pooled analyses of 199 placebo-controlled clinical studies involving the use of 11 different AEDs showed that patients receiving AEDs had approximately twice the risk of suicidal thinking or behavior compared to patients receiving placebo. AEDs should be administered cautiously in patients with depression or other psychiatric disorders; phentermine-topiramate should be avoided in patients with history of suicidal attempts or active suicidal ideation. The risk of suicidal thoughts and behavior should be carefully assessed against the risk of untreated illness, bearing in mind that epilepsy and many other conditions for which AEDs are prescribed are themselves associated with morbidity and mortality and an increased risk of suicidal thoughts and behavior. Patients, caregivers, and families should be alert to the emergence or worsening of signs and symptoms of depression, any unusual changes in mood or behavior, or the emergence of suicidal thoughts or behavior. If patients have symptoms of suicidal ideation or behavior, a dosage reduction or treatment discontinuation should be considered.

Renal Dysfunction

Major:

ethosuximide

Ethosuximide has a major potential interaction with Renal Dysfunction.

Succinimide anticonvulsants have produced morphological and functional changes in the liver of animals. In humans, abnormalities in liver and renal function studies have been reported. Therapy with succinimide anticonvulsants should be administered with extreme caution in patients with known hepatic or renal diseases. Periodic urinalysis and liver function tests are recommended for all patients treated with these drugs.

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Renal Dysfunction.

Sodium oxybate has a high content of salt, and it should be used with caution in patients sensitive to salt intake such as patients with heart failure, hypertension, or renal impairment.

Sleep Apnea

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Sleep Apnea.

The use of sodium oxybate may impair the respiratory drive especially in patients with compromised respiratory function. Sodium oxybate should be used cautiously in patients with sleep apnea and sleep-related breathing disorders as there have been reports of increased central apneas and clinically relevant desaturation. Prescribers should be aware that sleep-related disorders tend to be more prevalent in obese patients, postmenopausal women not receiving hormone replacement therapy and also among patients with narcolepsy.

Urinary Retention

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Urinary Retention.

Some hypnotic drugs can have an anticholinergic effect and should be used with caution in patients with glaucoma, and trouble urinating due to retention or enlarged prostate.

Weight Loss

Moderate:

Lumryz

The sodium oxybate in Lumryz has a moderate potential interaction with Weight Loss.

The use of sodium oxybate may impair the respiratory drive especially in patients with compromised respiratory function. Sodium oxybate should be used cautiously in patients with sleep apnea and sleep-related breathing disorders as there have been reports of increased central apneas and clinically relevant desaturation. Prescribers should be aware that sleep-related disorders tend to be more prevalent in obese patients, postmenopausal women not receiving hormone replacement therapy and also among patients with narcolepsy.

More resources

ethosuximide

A total of 392 drugs are known to interact with ethosuximide.

Lumryz

A total of 348 drugs are known to interact with Lumryz.

Drug Interaction Classification

These classifications are only a guideline. The relevance of a particular drug interaction to a specific individual is difficult to determine. Always consult your healthcare provider before starting or stopping any medication.
Major Highly clinically significant. Avoid combinations; the risk of the interaction outweighs the benefit.
Moderate Moderately clinically significant. Usually avoid combinations; use it only under special circumstances.
Minor Minimally clinically significant. Minimize risk; assess risk and consider an alternative drug, take steps to circumvent the interaction risk and/or institute a monitoring plan.
Unknown No interaction information available.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.