Patent expiry and costs for anti­cancer medicines for clinical use

Published in: Volume 6 / Year 2017 / Issue 2
Category: Commentary
Author(s): , ,
Visits: 108 total, 2 today
Keywords: cancer medicines, generics, health gain, prices, tyrosine kinase inhibitors (TKI)

Author byline as per print journal: Brian Godman, BSc, PhD; Claudia Wild, PhD; Alan Haycox, PhD

Venkatesan et al. have researched patent rights and pricing for (non-)tyrosine kinase inhibitors. It is not clear why the patents are so long and why prices can be high. These issues are discussed.

Submitted: 15 March 2017; Revised: 15 March 2017; Accepted: 17 March 2017; Published online first: 31 March 2017

Drs Brian Godman, Claudia Wild and Alan Haycox review the paper by Venkatesan et al. on the patent expiry of (non-)tyrosine kinase inhibitors.

Venkatesan et al. are to be congratulated on publishing their interesting paper providing general insight into exclusivity and patent rights for the (non-)tyrosine kinase inhibitors (TKIs) [1] used in the treatment of patients with cancer. The authors point out that the TKIs and some of the non-TKIs have long exclusive rights, which is a concern especially given some of their marginal or small health gains versus current standards. It is not clear why the patent lives are so long, and why there are such differences between Europe and the US. This may well be because of orphan status and other considerations; however, this information is not provided in their paper. The authors suggest that the long patent life may be due to the limited development time for these compounds; but this may also not necessarily be the case. In any event, as Venkatesan et al. point out, there is increasing concern with the growing cost of new medicines [2], which would be enhanced by granting premium prices and long patent lives for new medicines. Countries, even high-income countries, are now struggling to fund all new valued medicines, which is not in the interest of any key stakeholder group [2, 3].

There has been a rise in the clinical approvals of kinase inhibitors. Consequently, this is one of the reasons why TKIs were singled out for special attention in this paper. However, the review suggests that all TKIs are equally beneficial, which is not the case. Having said this, imatinib is a concern to payers with sales enhanced by off-label use with initially high prices granted on the basis of orphan status [4]. Global sales were estimated at US$4.75 billion in 2014, making imatinib the 14th highest selling product worldwide that year [5]. The rationale for choosing the non-TKIs is also not fully explained. Nevertheless, the paper gives very good insights into their likely generic availability, which is crucial for health authorities given the low prices that could be achieved for some of these cancer medicines [6].

In the discussion, the authors make a number of good points regarding high prices for new cancer medicines. This is a key concern across countries, with prices of new cancer medicines rising up to tenfold during the past decade [7, 8]. Prices for new cancer medicine now average US$150,000 or more per year of life gained [9], often with marginal health gain versus current standards [10]. In their recent review, Grössmann and Wild [11] documented that out of 134 new indications approved for cancer medicines since 2009, no data was available for progression-free survival or overall survival in 27%. A positive impact was seen for median overall survival in 55.5%; however, only 16% showed a difference of more than three months [11], which is increasingly seen as a minimum for a new cancer medicine to be seen as an advance [2, 10]. These concerns with ever increasing prices led to calls by US oncologists to pharmaceutical companies to moderate their growth in the future [12, 13]. High prices are also a major con­cern to lower- and middle-income countries, which currently account for more than 70% of cancer mortality [14]. Increasing prices of new cancer medicines is also threatening the sustainability of universal health care in those countries that provide this given ever-growing prevalence rates for cancer [7, 15]. This is leading to calls that cancer should no longer be singled out for special attention as this has been exploited [16].

It is estimated by some authors that the cost of bringing a new cancer medicine to the market is lower than US$100 million [13], and that prices of generic bortezomib, dasatinib, everolimus and gefitinib could potentially be as low as 1% of the current selling price [6]. This justifies calls for price moderation for new cancer medicines, as well as initiatives to make generics of val­ued cancer medicines available as early as possible with the cost of cancer medicines now accounting for an ever increasing proportion of the total costs of cancer care [7]. In the meantime, health authorities need to critically rethink how new cancer medicines should be valued, especially given concerns with surrogate markers [2, 10, 17]. Payers and providers also need to increasingly collaborate before product launch to agree likely patient populations where new cancer medicines will be most valued to limit their budget impact [18], and keep to this, as well as seek extensive discounts through risk-sharing arrangements [2, 19].

Overall, the paper by Venkatesan et al. gives good insights into likely generic drug availability of key cancer medicines, which is crucial for health authorities given the potentially low prices that could be achieved [6]. The paper also highlights the need for increased transparency in relation to development times and patent periods, the need for new cancer medicines to be appraised similarly to all other medicines for pricing and reimbursement evaluations, and not singled out for special status, as well as greater transparency in pricing and reimbursement evaluations. The latter given increasing concerns with high prices for new cancer medicines coupled with the low cost of goods of some [6, 13]. Finally, the observation that the development time for these (non-)TKIs is rather short should be investigated further through researching the actual timescales for phases I to III trials and earlier of the TKIs.

Competing interests: The authors have no conflicts of interest to declare.

Provenance and peer review: Commissioned; internally peer reviewed.

Authors

Brian Godman1,2,3, BSc, PhD
Claudia Wild4, PhD
Alan Haycox3, PhD

1Strathclyde Institute of Pharmacy and Bio­medical Sciences, University of Strathclyde, G40RE Glasgow, UK
2Division of Clinical Pharmacology, Karolinska Institute, Karolinska University Hospital Huddinge, SE-14186 Stockholm, Sweden
3Health Economics Centre, University of Liv­erpool Management School, University of Liverpool, Chatham Street, L69 7ZH Liver­pool, UK
4Ludwig Boltzmann Institute of Health Technology Assessment, 7/20 Garnisongasse, AT-1090 Vienna, Austria

References pending to upload

Author for correspondence: Brian Godman, BSc, PhD, Strathclyde Institute of Pharmacy and Biomedical Sciences, University of Strathclyde, G4 0RE Glasgow, UK; Division of Clinical Pharmacology, Karolinska Institutet, Karolinska University Hospital Huddinge, SE-14186 Stockholm, Sweden

Disclosure of Conflict of Interest Statement is available upon request.

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