By X. Tyler. Rowan University.
Te 2003 Mexican health reform legislated There are also limitations to the studies that the System of Social Protection in Health generic finasteride 5mg amex, of have been carried out to date 5 mg finasteride sale. It is clearly important the frst few years of Seguro Popular buy 5mg finasteride fast delivery, and taking to find the right mix of incentives and regula- advantage of its phased roll-out purchase finasteride 1mg with amex, it was important tions that affect both the supply of and demand to assess the impact of the intervention on health for services so that CCTs can improve the qual- and fnancial expenditure (70). Study design In a cluster randomized study, 100 pairs of health Main conclusions facility catchment areas (“health clusters”) were ■ CCT schemes serve as fnancial incentives randomly assigned to receive either the inter- for increasing the demand for and utili- vention or the control. Te intervention, Seguro zation of health services by reducing or Popular, provided a package of benefts that eliminating fnancial barriers to access. Tere were also service utilization which leads to improved funds to cover catastrophic health expenditures health outcomes. In health clus- ters receiving the intervention, there was a cam- paign to persuade every family to enrol in Seguro Case-study 11 Popular. In the matched control cluster families received the usual health care which they had Insurance in the provision to pay for (14). Te main outcomes were details of accessible and afordable of expenditures which were classifed as out-of- pocket expenditures for all health services, while health services: a randomized catastrophic expenditures were defned as health controlled trial in Mexico spending greater than 30% of capacity to pay (measured in terms of income). The need for research In 2003, Mexico initiated a new set of health Summary of fndings reforms which aimed to provide health coverage In the intervention clusters, out-of-pocket to approximately 50 million people who were expenses and catastrophic expenditures were without any form of fnancial protection for 23% lower than in the control clusters. Before 2003, the right to health care was those households within intervention clusters an employment beneft that was restricted to the that signed up toSeguro Popular(44% on average), salaried workforce. A large majority of the poor catastrophic expenditures were reduced by 59%. Surprisingly, and contrary to previous observational studies, Afordable health care in ageing there was no substantial efect of Seguro Popular populations: forecasting changes on the quality of care (such as improving access in public health expenditure to and use of medical facilities or reducing drug stock-outs) or on increasing coverage for chronic in fve European countries illness. Tese fndings might be explained by the short assessment period of 10 months (71, 72). The need for research Although these results are encouraging, further As the average age of European populations research is needed to ascertain the long-term becomes older, a larger number of people will efects of the programme. In addi- Te project design for assessing the efects of tion, a growing number of people will sufer Seguro Popularproved robust and showed that the from several morbidities at the same time. In August observations have generated concern that public 2012, within 10 years of launching the scheme, spending on health care in ageing populations 52 million previously uninsured Mexicans had will become unafordable. Taking into account coverage with a range of insurance schemes, Study design approximately 98% of 113 million people in Using published data on forecasts of popula- Mexico had fnancial risk protection in 2012, tion ageing, and on current health expenditure and Mexico has celebrated the achievement of by age, Rechel and co-workers calculated the universal health coverage (70, 73). Nevertheless, expected annual changes in per capita health further experimental research is needed with a expenditure associated with ageing over the longer period of follow-up in order to measure period 2010–2060 (74). Tey assumed that the efects on access to, and use of, health facili- health expenditure per person in each age group ties and health outcomes. Tis needs to be done would be constant over the 50-year period, and not only in Mexico but also in other countries that the unit costs of health care would also planning public health policy reforms. Te analysis was carried out for fve countries of the European Union (EU) Main conclusions – the Czech Republic, Germany, Hungary, the ■ In Mexico, implementation of a public Netherlands and Slovenia. Te annual ■ Seguro Popular resulted in a 23% reduction increases in per capita expenditure, calculated in out-of-pocket expenses and catastrophic as means for fve-year periods, were consistent expenditures, with benefts reaching across the fve countries. In the to contribute to the achievement of univer- Netherlands, for example, the increase in spending sal health coverage in other countries. Projected changes in per capita public health expenditure associated with ageing in fve European countries, 2010–2060 Note: Points are annual average percentage increases, calculated as fve-year means, derived from data on projected popula- tion ageing and on current patterns of health expenditure by age. Reproduced, by permission of the publisher, from Rechel et al. Furthermore, although Towards universal health coverage older people are major consumers of health care, Te common assumption that population ageing other factors – notably technological develop- will drive future health expenditure to unafordable ments – have a greater efect on total health care levels is not supported by this analysis. A study carried present some challenges for health and wel- out for the European Commission forecast moder- fare if, for instance, a declining fraction of ate increases in public-sector health spending due to the population has to bear the rising costs of ageing in the EU, growing from 6. If, with increases in life expec- challenges are not insuperable. The measures tancy, the proportion of life in good health does not that can be taken include: promoting good change, then public expenditure on health care is health throughout life, thereby increasing the expected to increase by only 0. A large proportion of lifetime tems so they are better able to cope with the 83 Research for universal health coverage needs of older people; and increasing the par- research cycle. In general, randomized controlled ticipation of older people in the labour force trials and trials using a minimization method (74, 88).
Alteplase is a thrombolytic Focal models are representative of clinical stroke and pro- agent that restores cerebral blood flow by removing the vas- duce histologic damage similar to ischemic stroke in hu- cular occlusion purchase finasteride 5 mg without a prescription. The focal model produces a pannecrotic core sur- a small proportion of stroke patients ( 2%) because it must rounded by a narrow penumbral border proven 1 mg finasteride. The penumbra is be given early to achieve efficacy and functional recovery at risk of becoming necrotic but is potentially salvageable following delayed reperfusion generic finasteride 1mg amex. Less than 15% of patients order finasteride 1mg mastercard, given the appropriate therapeutic intervention (3,4). The however, are admitted to the hospital within the 3-hour evolution of delayed neuronal death in global and focal is- safety window (1). Several other new treatments are being chemia occurs by a cascade of events that unfold temporally tested in the clinic and even more are in preclinical develop- and spatially (5). Antiplatelet therapy and thrombolytics are aimed at totoxic cascade is the rationale behind the various therapeu- improving cerebral blood flow but there are other therapeu- tic strategies for treating stroke and will be the framework tic strategies such as neuroprotectants, antiinflammatory for this chapter as we describe therapeutics that have been agents, free radical scavengers, and neurotrophic agents. In this chapter we survey the current status of clinical trials tested, or are currently being tested, in the clinic. PATHOPHYSIOLOGY AND PRECLINICAL THERAPEUTIC STRATEGIES FOR TREATING MODELS OF STROKE STROKE Stroke in the clinic is represented predominantly by is- Neuronal damage and death do not occur immediately after chemic stroke (80%), in which there is a loss of cerebral ischemia, which suggests temporal thresholds for reperfu- sion as with tPA and possibly therapeutic thresholds for neuroprotection. Small and Paul Morley: Institute for Biological Sciences, lish blood flow in ischemic regions with the aim of prevent- National Research Council of Canada, Ottawa, Ontario, Canada. Buchan: Department of Clinical Neuroscience, Foothills ing or minimizing cell damage (6,7). Various agents have Hospital, Calgary, Alberta, Canada. All of the agents designed to restore blood flow TABLE 93. CLINICAL TRIALS FOR ACUTE STROKE TREATMENTa are inappropriate for treating hemorrhagic stroke because of the danger of exacerbation of cerebral bleeding (8). In fact, Drugs to improve blood flow Antithrombotic most of the drugs that restore blood flow are associated with Heparin an increased risk of hemorrhage particularly when adminis- Nadroparin (low molecular weight heparin) Tinzaparin (low molecular weight heparin) tered late ( 6 hours). The drugs used to restore blood flow Danaparoid (low molecular weight heparinoid, Org 10172) can generally be grouped into antithrombotics, antiplatelet Anti-platelet Aspirin agents, fibrinogen depleting agents, or thrombolytics (Table Abciximab 93. Fibrinogen depleting Ancrod Antithrombotics such as heparin and warfarin have been Improve capillary flow tested in numerous trials. There is no evidence to date to Pentoxifylline Thrombolytics support the use of warfarin in the treatment of acute stroke Pro-urokinase (9). Heparin, followed by coumadin, is an extremely impor- Tissue plasminogen activator Streptokinase tant modality to prevent secondary strokes, particularly Urokinase cardioembolic stroke, in certain circumstances arterial oc- Drugs to protect brain tissue (neuroprotective agents) Calcium channel blockers clusion following dissection, and nearly always following Nimodipine venous infarction. In a large-scale randomized trial compar- Flunarizine Free radical scavengers—antioxidants ing heparin with the antiplatelet aspirin, heparin was associ- Ebselen ated with only three fewer deaths per 1,000 at 14 days and Tirilazad NPY-059 no difference at 6 months (10). Although there were fewer GABA agonists Clomethiazole recurrent strokes within 14 days, more of them were hemor- Glutamate antagonists rhagic. Moreover, 12,500 IU heparin was associated with AMPA antagonists GYKI 52466 significantly more transfused or fatal extracranial bleeds, NBQX hemorrhagic strokes, and deaths than 5,000 IU (10). Low YM90K YM872 molecular weight heparinoids have been developed that ZK-200775 (MPQX) have greater bioavailability and less effect on platelet func- Kainate antagonist SYM 2081 tion than heparin, thus reducing complications such as NMDA antagonists hemorrhage and thrombocytopenia (11). Results from the Competitive NMDA antagonists CGS 19755 (Selfotel) trials of two of the low molecular weight heparinoids have NMDA channel blockers been reported. ORG 10172 (Danaparoid) was tested in the Aptiganel (Cerestat) Dextrorphan Trial of ORG 10172 in Acute Stroke (TOAST) (12). De- Dextromethorphan spite an apparent positive response at 7 days, there was no Magnesium Memantine significant improvement in favorable outcome at 3 months MK-801 (12). In contrast, Nadroparin (Fraxiparine) was effective NPS 1506 Remacemide in improving outcomes at 6 months when treatment was AR-R15896AR initiated within 48 hours of symptom onset for a period HU-211 Glycine site antagonists of 10 days (13). Unfortunately, this study has not been ACEA 1021 replicated. The results of a 1,500-patient phase III trial GV150526 Polyamine site antagonists (Tinzaparin in Acute Ischemic Stroke Trial [TAIST]) for a Eliprodil third low molecular weight heparinoid, tinzaparin (Inno- Ifenprodil Growth factors hep), are completed and are currently being analyzed (14).
These tended to involve some transfer of work from the acute providers into general practice quality 5 mg finasteride. This was optional effective finasteride 5mg, but peer pressure and demonstration was helping to drive up standards all round – with a few exceptions of around half a dozen practices which were seen as needing more direct attention buy finasteride 5 mg low price. In this sense cheap 1mg finasteride with amex, the case illustrates a step-by-step approach. To some degree the initiative has characteristics of being mainly a service quality improvement programme, but in other ways it has some features of a service redesign. The crucial point in terms of our analytical framework is that institutional work was being done which was creating a new set of working norms. This was effected through two main arenas of clinical leadership: the central CCG based around three GPs as core leaders and out in the localities where GP leaders had adapted their role from being primarily representatives of those localities and as prime channels of communication up and down the chain, to a new role of determined drivers of change insisting that the new standards of service were being developed and delivered. Given the nature of the service redesign initiative, performance management was a key element. It wanted to be sure that its payments were being matched by the required services being offered. The CQC was seen to be an additional quality control and the CCG welcomed and used that extra leverage. There were some concerns about conflicts of interest. This was seen most clearly with regard to the expanded services (at levels 2 and 3). These services were offered by local provider groups – sometimes known as delivery units. These local units were the same bodies as the commissioning locality bodies. Hence, the local network lead (a commissioning role) would often be the person leading the design of the expanded service (a provider role). Meetings of these locality groups were often divided into two parts so that both roles could be addressed at the same meeting with the same personnel. As one CCG manager observed: Conflicts of interest are huge at the moment, and it does concern me. I think whether you have real or perceived conflicts of interest you need to have a policy and a strategy for dealing with that. You know, why did the CCG support one organisation and nobody else? This issue may be freely reproduced for the purposes of private research and study and extracts (or indeed, the full report) may be included in professional journals 51 provided that suitable acknowledgement is made and the reproduction is not associated with any form of advertising. Applications for commercial reproduction should be addressed to: NIHR Journals Library, National Institute for Health Research, Evaluation, Trials and Studies Coordinating Centre, Alpha House, University of Southampton Science Park, Southampton SO16 7NS, UK. FINDINGS FROM THE CASE STUDIES A related view came from a secondary care doctor: I think that, generally, clinical leadership has to be system wide, it has to be unconflicted and, I would say, mostly void of commissioning or provider responsibility. I think real clinicians have the interests of patients and populations at heart but all we sometimes see emerging is clinicians who get into those roles who suddenly have the interests of their organisations at heart, rather than the patients and populations. Secondary care doctor There was uncertainty about the sustainability of these arrangements. In general, it was believed that the direction of travel was towards the provider role. Indeed, a popular interpretation was that the primary care improvement programme, through its challenges and demands, had stimulated a new provider landscape in general practice and that the logical outcome would be the creation of accountable care organisations (ACOs). The concerns about conflicts of interest and the related concerns about whether or not there was appropriate open tendering to allow potential alternative providers the chance to come forward reflect, in large measure, the wider institutional field prevailing at the time. The logic of open competition and challenge sat alongside an alternative logic based on the idea of improving services, although more effective collaboration among current providers. The institutional field altered during 2016–17 in that the erstwhile emphasis on the competition/challenge logic has been subsumed in favour of the planning and collaboration logic, as seen in the support for STP from the centre and the altered stance from NHS Improvement.
THE EVALUATION OF DRUG PRODUCTS Congress concluded buy 1 mg finasteride with visa, evidently order finasteride 1mg with amex, that the public health would INTENDED FOR USE IN THE MANAGEMENT be better served if the Act allowed the marketing of a drug OF PSYCHIATRIC CONDITIONS even if only a minority of qualified experts agreed that it had been shown to be effective order finasteride 5mg amex. Among all the designs conforming to the requirements For IND issues buy cheap finasteride 1 mg online, signatory authority on most matters is enumerated in 21 CFR 314. Signatory authority is both a placebo and a standard drug control is especially divided where NDAs are concerned. Not only does such a design allow an estimate cal entities (NCEs) are approved or disapproved at the Of- of what might have been had no treatment been adminis- fice level (Office of Drug Evaluation 1); supplemental tered (i. The Act makes no distinction between failure of a study to find a drug placebo difference is owing the value of symptomatic treatments and those that are ad- to the inability of the sample of patients randomized in the vanced as cures for a disease. Almost any claim can be made, study to respond to drug. The agency is mindful, of course, that a tion of the effectiveness of new drug products. In light of single dose is unlikely to be the best choice for all patients; the variability in course and outcome among samples of nonetheless, for dose evaluation purposes, a fixed-dose de- patients assigned the same psychiatric diagnosis, it is highly sign is more likely to be interpretable than a dose titration unlikely that either the historic control or the no control design. Clinicians often find this assertion counterintuitive, designs would ever be deemed acceptable for the evaluation but designs allowing up-titration for therapeutic nonre- of a drug for a psychiatric indication. To the contrary, the for data that might better inform the use of prescription choice of patient subject is almost always based on the spon- drug products in children. This sampling strategy is not of investigational drugs in children a premarket obligation. In some patients with the condition for which the treatment 1998, however, the agency issued new regulations (21 CFR will be marketed. For example, prior to the of the patient samples that had been employed in them promulgation of DSM-III in 1980, sedatives, as they were and whether or not long-term maintenance trials had been then known, were granted broad and nonspecific claims for conducted. The strategy employed was intended to reserve anxiety, anxiety neurosis, etc. In recent years, claims have been chotic conditions other than schizophrenia. In dealing with these drugs shown to be effective in studies enrolling schizo- issues, the agency has to consider whether or not already phrenic patients will get claims for use in schizophrenia, approved older claims subsume the new entities. Incidentally, the newly announced approach claim simply a re-expression of a previous one, a claim for to product labeling is perfectly reasonable and certainly con- a subset of the patients covered by the previously approved sistent with the requirements of law, although it is obviously claimed use, or an entirely new claim for a previously nonex- not the one that the author prefers. Drugs are administered to individ- of related claims may be. For example, sponsors often seek uals, not diagnoses. There is advantage in knowing, there- to define a claimed use in a way that will allow the unique fore, whether, and if so how and to what extent, various promotion of their drug product (i. Claims advanced by sponsors for the use of sponse rates among samples of patients assigned identical marketed antipsychotic drug products in the management psychiatric diagnoses documents that our current psychiat- of psychotic demented patients are a case in point. As a consequence, to dem- regularly deemed to be pseudospecific, in the absence of onstrate that their products are effective in use, sponsors evidence to prove the contrary. As discussed, from a far as the author can determine, came about because the strictly regulatory perspective such criticisms are irrelevant. Support for other and/or more demanding standards for establishing the existence of this entity derived primarily from the testi- drug effectiveness, but it did not. Although there is little doubt that the algo- rather than a true drug effect, accounts for the positive study rithm endorsed by the PDAC does capture demented indi- reports submitted in the application. Reviewers search for evidence that classes of drugs to be something else: nutriceuticals, botani- the randomization process failed, the treatment mask was cals, food supplements, etc. These substances escape the penetrated, subjects failed to comply with protocol require- premarket drug clearance requirements of the FDDCA be- ments, etc. The extent, pattern, and timing of premature cause they are deemed by DSHEA not to be drugs. Subsumed within the ill-described mix of botanicals, equal). The lack of data bearing on the safety and efficacy of THE FUTURE OF DRUG REGULATION these drug substances did not deter the Congressional Lead- ership, however; to the contrary, when Senator Orin Hatch, These are, at once, the best of times and the worst of times a sponsor of DSHEA, introduced the bill he asserted that for medical therapeutics.
9 of 10 - Review by X. Tyler
Votes: 110 votes
Total customer reviews: 110