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The Food and Drug Administration on Monday approved a controversial drug to treat Duchenne muscular dystrophy, a rare disease that confines boys to wheelchairs and condemns them to an early death.

The decision came after months of protracted debate about whether drug maker Sarepta Therapeutics had provided enough evidence to demonstrate that its medication, called eteplirsen, had a meaningful impact on patients. Sarepta said the drug would be priced at about $300,000 a year in the US.

In reaching its decision, the agency essentially overruled its own medical staffers, who earlier this year questioned the effectiveness of the drug, which was tested in a small clinical trial. The wrangling raised still larger questions about standards for approving a drug, especially when it’s intended for patients with a rare and deadly disease and no other treatment options.


“In rare diseases, new drug development is especially challenging due to the small numbers of people affected by each disease and the lack of medical understanding of many disorders,” said Dr. Janet Woodcock, who heads the agency division that reviews medicines, in a statement.

As a condition of the approval, Sarepta will have to conduct a two-year, randomized controlled trial to verify the clinical benefit of the drug. The purpose is to determine whether the drug actually improves motor functions. If the trial fails, the FDA could move to withdraw approval.


The approval delighted a frazzled, but vociferous community of parents, whose determined lobbying efforts were reminiscent of the movement three decades ago to force regulators to greenlight AIDS treatments. And the FDA endorsement also jazzed investors, who sent Sarepta shares soaring, while breathing new life into still other companies that are investigating Duchenne treatments. Sarepta stock was up 80 percent in afternoon trading.

“This is huge. It’s going to give all of us some hope. But it’s also a bit surreal, after all the ups and downs we’ve been through,” said Debra Miller of CureDuchenne, an advocacy group that raises money to invest in drug makers that are developing products to combat DMD and has also donated money to Sarepta.

The fate of the Sarepta drug has been closely watched as a litmus test for an intensifying struggle between the FDA and patient groups that want the agency to take a more expansive view toward approving medicines for unmet medical needs. In this instance, patient advocates hoped the FDA would use the accelerated approval process to endorse eteplirsen. This approach relies on a substitute outcome in a clinical trial to suggest a drug may have, but does not guarantee, a benefit.

It was a long and complicated road, however, to this moment, as the FDA and Sarepta squabbled repeatedly over several technical, but significant details.

A key issue was whether the drug can sufficiently produce higher levels of a protein called dystrophin. Without this protein, muscle fibers degenerate and voluntary movement becomes impossible. The FDA also raised doubts about the results of a small, 12-patient clinical trial that Sarepta relied on to make its case, as well as the viability of six-minute walking tests that trial participants underwent. Moreover, the company failed to conduct a larger trial involving the use of a placebo, as the FDA had requested.

In light of these concerns, an FDA advisory panel in April voted that the drug should not be approved and, by a narrow margin, also agreed that the drug does not appear to be effective. Those decisions were made at a day-long meeting that was punctuated by a parade of emotional pleas from parents and children, some of whom appeared in wheelchairs.

Despite the outcome, the agency appeared to signal that parents should not lose hope. In remarks designed to appease the crowd, Janet Woodcock, who heads the agency division that approves drugs, said that “It’s possible to reach different conclusions based on the data presented today … Failing to approve a drug that actually works in devastating diseases — these consequences are extreme.”

And so, the FDA made an unexpected request for Sarepta to provide more data about muscle biopsies from 13 boys who participated in an ongoing trial in order to determine the extent to which the medicine may produce dystrophin. The move suggested that the FDA tried to find other ways to approve the drugs.

This story has been updated to include the expected price of eteplirsen and clarified that CureDuchenne has donated money to Sarepta, but not invested funds in the company.

  • i have muscular dystrophy I believe it`s the duchenne I had it since birth it got worse as the years went by from early childhood now I can`t walk good I walk slow with a cain I cain`t climb if I fall I have to get someone to help me up my back gives out very easy I lose my balance easy I can`t get in a shower unless it`s a walk in so for the past few years i can only wash off and it`s hard to get out of a lift chair there any I can get a shower put in so I can take showers social security won`t help ..also I`m weak and tired all the time and some times if I do much my body is so tired I have to laydown and not do anything for 3 to 5 days

  • 1. My son name Shubh Singh Date of Birth 08-09-2008 is suffering from DMD exon 49-50. It is requested to please intimated whether cure for the subject disease exsist at your hospital also intimate approx cost for treatment duration for the patient at your hospital
    2. An early reply is requested please .

  • Is there any drug on trial to help my nephew with duchennes to prolong his life or any advice or help u can give me thank you

  • Is Sarepta drug going to be remedy for all type’s of Muscular dystrophy.
    Is the treatment available in India.

    Please reply.

  • My children age 6 year dmd deases .this cpk 1100. What is dmd treatment success.i am full family very depression.

  • when will drug for limb gridle muscular destrophy will be approval to get by the patient.

  • I have been affect by muscular destrophy type limb gridel. when will the drug the will reaches the patient for muscular dystrophy type limb gridle

  • My best friend who is 67 years old has developed Muscular Distrophy 2 years ago according to biopsy of Muscles . Can Sarepta Therapeutics provide a cure for this decease with the new found drug?!

  • Pl provide details of DMD medicine which approved by FDA on 2016/09/ brother is suffering from this disease. I will be highly obliged to you.

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