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Hepatitis C Treatment Unaffected in People Who Use Drugs

by Julia Samuel on September 7, 2016 at 2:47 PM
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Hepatitis C Treatment Unaffected in People Who Use Drugs

Illicit drug use prior to and during hepatitis C therapy has no impact on the effectiveness of the therapy, and reinfection is low.

Hepatitis C - which if left untreated can lead to cirrhosis and liver cancer - affects approximately 64-103 million people around the world, resulting in around 700 000 deaths per year. In countries such as the US and Australia, hepatitis C now kills more people than HIV. In the UK, the number of annual deaths due to hepatitis C has quadrupled since 1996.

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New, highly effective curative treatments have sparked hope of a world free of hepatitis C. The World Health Organisation (WHO) has set ambitious elimination targets of 90% diagnosed, 80% treated and a 65% reduction in hepatitis C-related mortality by 2030. In most high income countries, the vast majority (80%) of new infections are in people who inject drugs, but this group has faced widespread exclusion from the new therapies.

Reasons given for this exclusion include the price of new medications, fears of poor adherence, fears of reinfection and concerns over efficacy. However, international research debunks these myths.
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The world's largest study of new hepatitis c curative therapies - the C-EDGE CO-STAR Clinical Trial - has now found that illicit drug use prior to and during hepatitis C therapy had no impact on the effectiveness of the therapy, and that reinfection is low, at 4%. The results also showed excellent treatment adherence. Cure rates were comparable to results in hepatitis C populations that exclude people who use drugs.

Further, mathematical modelling suggests that even moderate levels of treatment uptake in people who use drugs could offer considerable prevention benefits.

One study looking at settings in Scotland, Australia and Canada indicated a 3-5 fold increase in treatment uptake among people who inject drugs could halve hepatitis C prevalence in 15 years.

Other studies modelled on people who inject drugs in the UK and France concluded realistic treatment scale-up could achieve 15-50% reduction in chronic hepatitis C prevalence in a decade.

To add to the benefits, treating people who use drugs with moderate or mild hepatitis C with new therapies is cost-effective in most settings compared to delaying until cirrhosis.

Several countries have introduced hepatitis C elimination programs, with Australia, France and Iceland offering unrestricted access. All eyes are now turned on Australia, where over 20 000 people (10% of the chronic HCV population) have initiated treatment in the first four months since subsidised treatment has become available.

"Countries such as Australia and France have taken the lead in adopting evidence-based policies that will save lives. Now it's time for other countries, including the US and Norway, to follow their lead and allow all patients with chronic hepatitis C to be treated with the new drugs," said Professor Olav Dalgard, Chair of the INSHU 2016 Symposium.

"We strongly recommend that all restrictions on access to new hepatitis C treatments based on drug or alcohol use or opioid substitution treatment be removed. There is no good ethical or health based evidence for such discriminations. Nor do the restrictions make clinical, public health or health economic sense," he said.

"Providing treatment to people who inject drugs, integrated with harm reduction programs and linkage to care, is the key to hepatitis C program success. And our experience in Copenhagen shows this can work. Such efforts need to be initiated and scaled up globally," added Professor Jeffrey Lazarus, Centre for Health and Infectious Disease Research, Rigshospitalet, University of Copenhagen, Denmark, who is presenting at the Symposium.



Source: Eurekalert
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