Johnson & Johnson has just agreed to let the non-profit Stop TB Partnership develop and distribute generics of the drug bedaquiline, a drug for multi-drug-resistant/âextensively drug-resistant tuberculosis. From Forbes:
Johnson & Johnson charges $272 for the total six-month course needed to treat tuberculosis, but one study published in 2017 estimated that if generics entered the market, the price would fall to somewhere between $48-$102.
In 2022, this paper modelled the incremental cost per DALY averted at 364 USD/âDALY averted for patients in South Africa who had extensively drug-resistant tuberculosis.
Not sure how to do this math. Would this new deal with Stop TB Partnership change that estimate very much?
Hey Spencer!
From the 2022 South Africa paper, it appears that the bedaquiline-based regimen actually consists of 8 different drugs (see table S1), with a total cost per treatment of $6402 in the base-case. Itâs not clear to me how much each drug contributes to the total cost, but you should be able to work this out from the regimen info from table S1 and the drug cost data from the medicines catalog (from reference 24 of the paper). Presumably if youâve done it right you should end up with ~$6,402. Then you can just tweak the cost of bedaquiline (Iâm assuming no other drugs have also changed price).
If you manage to do this, then quite plausibly your updated cost per treatment will fall within the range of the paperâs one-way sensitivity analysis ($5,122 to $7,682), i.e. Figure 2. From this you can eyeball what the new ICER will be:
Alternatively, you could try reaching out to the lead authorâassuming they still have their model to hand, it should be very easy for them to adjust the cost of BDQ and see what the model outputs :)
Also, just to caution, the South Africa paper is âfrom the perspective of the South Africa national healthcare providerâ and so uses the GDP per capita of South Africa as the willingness-to-pay threshold, and some of the health and cost data is also South Africa-specific. So I donât think this can easily be used to infer the change in cost-effectiveness in other settings (though it might give a rough indication of whether or not there could be a substantial change).
Thatâs great news thanks for the update! Its fantastic how big pharma has recently been throwing some pretty big bones to the not-for-profit world to manage TB, with this and the vaccine now in control of non-profits
Overseeing the production and delivery of drugs and vaccines is a big step for non profits, and this is going to be an important tests whether they can do it or notâI hope it works out really well!
In terms of cost-effectiveness, from an EA perspective at least the major benefit of treating MDR/âXDR TB probably comes from reducing the chance of a disastrous strain of TB which could readily spread and be basically untreatable, rather than just looking a short distance ahead like this paper did.
âAll three prior analyses in South Africa were performed over a long (10 years) time horizon to capture the downstream cost and DALYs of multidrug-resistant TB-related treatment failureâ
Looking 10 years ahead is actually pretty impressive, but the cost-effectiveness analysis could look a lot more impressive if they looked 100 years ahead, and also considered low probablility catastrophic outcomes too. Indeed it would be very difficult to calculate with huge errors, but not as hard as things like AI cost-effectiveness calculations! Unfortunately we wonât see that kind of analys much in peer-reviewed papers, because it wouldnât get accepted like it would here on the forum ;)
Reducing the cost of the drugs is great, and might have an incremental effect on cost-effectiveness, but perhaps from my (and a more
âEA perspectiveâ the biggest potential benefits here are that if we can treat more people with MDR/âXDR, we have a better chance of preventing catastrophe later.