BurnA
Senior Member
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For RA physicians prescribe rituximab because it has a license. Just like people buy Mercedes cars because they are for sale. In general they do not get involved in weighing up the risks and benefits - they rely on drug company based papers in the literature - which is probably unwise. Having gathered the data myself and talked to other people involved in development I think I probably do have an idea how to weigh risks and benefits in RA but it is not straightforward. I am pretty sure that it is very worthwhile, having seen the details of the data. The situation in ME is quite different. We do not yet have a trial that showed significant difference on a primary outcome measure and even when we do the outcome measures are much more difficult to interpret in ME than in RA.
How critical is identifying potential responders? if this does get a positive result by 2018 then in terms of weighing up risks and benefits for an individual patient whether the overall response is 20% or 50% or whatever, all a patient can do is decide if the risks are worth it because actually the benefits are purely speculative for them unless they know they might respond.
Its hard to see it ever being a straightforward decision without a known response indicator.