June 26, 2020 / 12:06 AM / 14 days ago

FDA approves Zogenix's drug for rare childhood epilepsy

(Reuters) - The U.S Food and Drug Administration on Thursday approved Zogenix Inc’s drug to treat seizures associated with a rare form of childhood epilepsy known as Dravet syndrome.

The drug, branded as Fintepla, uses a low-dose liquid solution of fenfluramine, which was used in an obesity drug combination that was later withdrawn from the market due to evidence of heart valve damage.

The approval contains a boxed warning, the FDA's harshest, flagging concerns about valvular heart disease and pulmonary arterial hypertension, and is available only through a restricted drug distribution program. (reut.rs/3g2naBs)

The agency last year had refused to fully review the marketing application for the treatment, and in February extended the application’s review by three months.

Dravet Syndrome, which affects about 1 in 15,700 individuals in the United States, causes long and frequent seizures that are difficult to control through antiepileptic medicines.

The approval pits Zogenix against GW Pharmaceutical’s cannabis-based drug, Epidiolex, which is also approved to treat seizures related to Dravet Syndrome and Lennox-Gastaut syndrome.

Fintepla is expected to bring in peak sales of about $450 million in about 5-7 years for its use against Dravet syndrome, according to Guggenheim analyst Yatin Suneja.

Zogenix is also testing Fintepla for treating Lennox-Gastaut syndrome.

Reporting by Manas Mishra, Manojna Maddipatla and Trisha Roy in Bengaluru; editing by Uttaresh.V

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