Ganaxolone is the 3β-methylated synthetic analog of allopregnanolone; it belongs to a class of compounds referred to as neurosteroids. Ganaxolone is an allosteric modulator of GABAA receptors acting through binding sites which are distinct from the benzodiazepine binding site. It has activity in a broad range of animal models of epilepsy. Ganaxolone has been shown to be well tolerated in adults and children. In early phase II studies, Ganaxolone has been shown to have activity in adult patients with partial-onset seizures and epileptic children with history of infantile spasms. It is currently undergoing further development in infants with newly diagnosed infantile spasms, in women with catamenial epilepsy, and in adults with refractory partial-onset seizures.



Investigated for use/treatment in pediatric indications and seizure disorders.


Ganaxolone is a powerful positive allosteric modulator of GABAA receptors with potency and efficacy comparable to its endogenous analog 3a,5a-P (Carter et al., 1997). As with 3a,5a-P, Ganaxolone potentiation of the GABAA receptor occurs at a site distinct from the benzodiazepine site. Ganaxolone has... Read more

Mechanism of action

Ganaxolone belongs to a novel class of neuroactive steroids called epalons, which specifically modulate the γ-aminobutyric acid type A (GABAA) receptor in the central nervous system (CNS). Chemically related to progesterone but devoid of any hormonal activity, the epalons have potent antiepileptic,... Read more


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Protein binding


Volume of distribution

Information currently not available.


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Half life

1.3-1.9 hours

Route of elimination

Information currently not available.


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Adverse Effects


Information currently not available.

Food Interactions

    Information currently not available.


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  • Paracetamol(acetaminophen)
  • Paxil(paroxetine)
  • Pamelor(nortriptyline)
  • Panadol(acetaminophen)
  • Patanol(olopatadine ophthalmic)
  • Pataday(olopatadine ophthalmic)
  • Parnate(tranylcypromine)
  • Pazeo(olopatadine ophthalmic)
2 References
  1. 1 . Nohria V, Giller E: Ganaxolone. Neurotherapeutics. 2007 Jan;4(1):102-5.PubMed: 17199022
  2. 2 . Pieribone VA, Tsai J, Soufflet C, Rey E, Shaw K, Giller E, Dulac O: Clinical evaluation of ganaxolone in pediatric and adolescent patients with refractory epilepsy. Epilepsia. 2007 Oct;48(10):1870-4. Epub 2007 Jul 18.PubMed: 17634060