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08 January 2013

First new TB drug in 50 years

Some South African tuberculosis(TB) patients in dire need will get the US-approved drug bedaquiline, the first new treatment for the disease in 50 years.

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Some South African tuberculosis(TB) patients in dire need will get the US-approved drug bedaquiline, the first new treatment for the disease in 50 years.

The US Food and Drug Administration (FDA) recently approved bedaquiline to treat multidrug-resistant TB (MDR-TB). The news strengthens efforts to make the drug available in South Africato patients who have failed all other MDR-TB treatment options.

“There is an urgent need for new drugs like this given the growing epidemic of drug-resistant TB in places like South Africa,” says Dr Eric Goemaere, HIV & TB Advisor for Médecins Sans Frontières (MSF) in Southern Africa.

“Hopefully, this will be the first of several new therapies for use in combinations that dramatically increase the efficacy of TB treatment and shorten the time people have to undergo treatment.”

MDR treatment gruelling, ineffective

South Africa has one of the world’s highest rates of MDR-TB with at least 13 000 new cases projected for 2013, according to the World Health Organisation.

Today’s treatment for MDR-TB involves a two-year course of drugs and painful injections, some of which can cause serious side-effects including hearing loss.Despite the gruelling treatment, patients have a less than 50% chance of cure. New medicines to improve this regimen are desperately needed.

Access to bedaquiline in South Africa has so far been extremely limited.The only patients who have benefitted thus far have been receiving the drug in clinical trials, as well as four patients who were granted access through a short lived ‘compassionate use’ programme authorised by South Africa’s Medicines Control Council. Compassionate use allows doctors to prescribe unapproved drugs to seriously ill patients who have no other treatment options.  

Among the four patients is Dr Dalene von Delft, who contracted MDR-TB after caring for patients infected with strains of drug-resistant TB.

“I was faced with potential life-long deafness from my existing TB treatment, which would have meant an end to my career as a medical doctor, or slow death from TB. When I heard about bedaquiline as a third option, I did everything I could to get it,” says Von Delft, who is now cured of TB.

“As a physician, I knew the possible risks of the new treatment, but compared to the long and toxic alternative, I was very glad to be able to take it,” she adds. “I still have my hearing. I can still practise as a physician.”

New drug for some SA patients

The MCC recently authorised a new clinical access programme in which selected patients infected by highly resistant strains of TB who have run out of treatment options will receive the drug under close supervision in four sites in South Africa. The programme aims to provide the drug to those who most need it, while collecting more safety data on the drug.

The MCC has also agreed to do a fast track registration review of bedaquiline, which will shortly be submitted by the drug’s manufacturer Janssen Pharmaceutica. This process could lead to full approval and availability to the drug for those who would most benefit. If Janssen Pharmaceuticais granted fast-track registration, they will continue to study the drug and share new data from clinical trials on an ongoing basis. The US FDA accelerated approval is also contingent on additional safety data being submitted.

“We urgently need to be able to use this drug in a way that we can both gather information about its safety and efficacy while reaching those most in need.” says MSF epidemiologist,Dr Helen Cox.

“Although there are some legitimate questions around the safety of bedaquiline, the FDA – one of the world’s most stringent regulatory authorities – has clearly indicated that the benefits of this drug far outweigh the potential risks,” Cox says. “It’s vital that we understand that this drug is a life-saver for the many who have run out of options.”

(MSF SA, January 2013) 

Read more:

TB: are you at risk?

Screening can miss TB in HIV patients on ART

How does TB spread?

 
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