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Patent US10603290
Zogenix International Limited

Formulation For Inhibiting Formation Of 5-ht2b Agonists And Methods Of Using Same

Drug combinations and their use are disclosed. A first drug is administered in combination with a second drug. The first drug such as fenfluramine is characterized by the formation of a metabolite including 5-HT2B agonists such as norfenfluramine with known adverse side effects. The second drug is in the form of a CYP inhibitor such as cannabidiol which modulates the formation of metabolite down thereby making the first drug safer.

Much More than Average Length Specification


1 Independent Claims

  • Claim CLM-00001. 1. A method of reducing or ameliorating seizures in a patient, comprising: administering fenfluramine; and administering cannabidiol thereby modulating down formation of norfenfluramine, and resulting in higher levels of fenfluramine.
  • Claim CLM-00005. 5. A method of reducing or ameliorating seizures in a patient diagnosed with a form of refractory epilepsy, comprising: administering a liquid formulation of fenfluramine to the patient in an amount in the range of 0.2 mg/kg/day to 0.8 mg/kg/day; and administering cannabidiol in a liquid formulation in an amount of 0.5 mg/kg/day to 25 mg/kg/day thereby modulating down formation of norfenfluramine, and resulting in higher levels of fenfluramine.
  • Claim CLM-00006. 6. A method of reducing or ameliorating seizures in a patient diagnosed with a form of refractory epilepsy, comprising: administering a liquid formulation of fenfluramine to the patient in an amount which is 30% less than an effective amount in the range of 0.2 mg/kg/day to 0.8 mg/kg/day, due to co-administration of cannabidiol in a liquid formulation in an amount of 0.5 mg/kg/day to 25 mg/kg/day thereby modulating down formation of norfenfluramine, and resulting in higher levels of fenfluramine.
  • Claim CLM-00009. 9. A method of reducing or ameliorating seizures patient diagnosed with Dravet syndrome, comprising: administering a liquid formulation of fenfluramine to the patient in an amount in the range of 0.2 mg/kg/day to 0.8 mg/kg/day; and administering cannabidiol in a liquid formulation in an amount of 0.5 mg/kg/day to 25 mg/kg/day thereby modulating down formation of norfenfluramine, and resulting in higher levels of fenfluramine.
  • Claim CLM-00010. 10. A method of reducing or ameliorating seizures in a patient diagnosed with Dravet syndrome, comprising: administering a liquid formulation of fenfluramine to the patient in an amount which is 40% less than an effective amount in the range of 0.2 mg/kg/day to 0.8 mg/kg/day, due to co-administration of cannabidiol in a liquid formulation in an amount of 0.5 mg/kg/day to 25 mg/kg/day thereby modulating down formation of norfenfluramine, and resulting in higher levels of fenfluramine.


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