By K. Ivan. Messiah College. 2019.
Traditional models describe problem solving in three stages: (1) interpretation (making sense of the problem); (2) coping (dealing with the problem in order to regain a state of equilibrium); and (3) appraisal (assessing how successful the coping stage has been) buy levitra oral jelly now. According to models of problem solving these three stages will continue until the coping strategies are deemed to be successful and a state of equilibrium has been attained order 20mg levitra oral jelly otc. In terms of health and illness order levitra oral jelly 20mg with amex, if healthiness is an individual‘s normal state, then any onset of illness will be interpreted as a problem and the individual will be motivated to re-establish their state of health (i. These stages have been applied to health using the self-regulatory model of illness behaviour (see Figure 3. Once the individual has received information about the possibility of illness through these channels, according to theories of problem solving, the individual is then moti- vated to return to a state of ‘problem-free’ normality. According to Leventhal, the problem can be given meaning by accessing the individual’s illness cognitions. Therefore, the symptoms and social messages will contribute towards the development of illness cognitions, which will be constructed according to the following dimensions: identity, cause, consequences, time line, cure/ control. These cognitive representations of the ‘problem’ will give the problem meaning and will enable the individual to develop and consider suitable coping strategies. However, a cognitive representation is not the only consequence of symptom percep- tion and social messages. The identiﬁcation of the problem of illness will also result in changes in emotional state. For example, perceiving the symptom of pain and receiving the social message that this pain may be related to coronary heart disease may result in anxiety. Therefore, any coping strategies have to relate to both the illness cognitions and the emotional state of the individual. Stage 2: Coping The next stage in the self-regulatory model is the development and identiﬁcation of suitable coping strategies. Coping can take many forms, which will be discussed in detail later in this chapter and in Chapter 11. However, two broad categories of coping have been deﬁned that incorporate the multitude of other coping strategies: approach coping (e. When faced with the problem of illness, the individual will therefore develop coping strategies in an attempt to return to a state of healthy normality. This involves individuals evalu- ating the eﬀectiveness of the coping strategy and determining whether to continue with this strategy or whether to opt for an alternative one. This process is regarded as self-regulatory because the three components of the model (interpretation, coping, appraisal) interrelate in order to maintain the status quo (i. Therefore, if the individual’s normal state (health) is disrupted (by illness), the model proposes that the individual is motivated to return the balance back to normality. For example: s Symptom perception may result in an emotional shift, that may exacerbate the perception of symptoms (e. The aim of the study was to test directly elements of Leventhal’s self-regulatory model and to examine whether the way an individual makes sense of their illness (their illness repre- sentation) and the way they cope with their illness (their coping strategies) relates to their level of functioning (the outcome measure). Methodology Subjects A total of 520 members of the Australian and New Zealand Myalgic Encephalomyelitis Society were sent an invitation to take part in the study, of whom 308 returned the consent forms and were sent a questionnaire. These subjects ranged in age from 18 to 81, 61 per cent were married, 55 per cent had received tertiary education and the mean length of illness was 10. Design The study involved a cross-sectional design with all subjects completing a questionnaire once. Measures Subjects were sent a questionnaire consisting of the following measures: 1 The Illness Perception Questionnaire. This questionnaire measured illness representa- tions and included items reﬂecting the following aspects of illness representations: s Identity: This consisted of a set of 12 core symptoms (e. Subjects were asked to rate each symptom according to how often they experienced them from ‘never’ to ‘all the time’. Results The relationship between components of illness representations The results showed that a strong illness identity was related to a belief in serious con- sequences and a more chronic time line (e. The relationship between illness representations and coping The results showed a positive relationship between identity (the illness representation) and coping strategies such as planning venting emotions, behavioural disengagement and mental disengagement (e. The results also showed a positive relationship between consequences (the illness representation) and coping strategies such as planning, suppression of competing activities, seeking emo- tional social support, venting emotions, mental disengagement (e. In addition, the results showed a positive relationship between internal control/cure (the illness representation) and coping strategies such as active coping, planning, positive reinterpretation and a negative relationship with behavioural disengagement (e. Finally, the results showed a belief that the illness would last a long time (the illness representation) was related to coping by suppressing competing activities, behavioural disengagement (e. The relationship between illness representations and level of functioning The results showed that the illness representation components of illness identity, emo- tional causes of the illness, controllability/curability and consequences had the strongest overall association with measures of functioning, suggesting that individuals who had the most symptoms, believed that their illness was out of their control, caused by stress and had serious consequences, showed low levels of psychological adjustment and well-being and higher levels of dysfunction. In addition, the results provide support for Leventhal’s self-regulatory model as illness representations were related to coping and a measure of outcome (level of functioning). However, because of the cross-sectional nature of the design it is not possible to say whether illness representations cause changes in either coping or outcome and as the authors conclude ‘only a prospective design can clarify some of these issues’. Problems with assessment This dynamic, self-regulatory process suggests a model of cognitions that is complex and intuitively sensible, but poses problems for attempts at assessment and intervention. For example: 1 If the diﬀerent components of the self-regulatory model interact, should they be measured separately? For example, is the belief that an illness has no serious consequences an illness cognition or a coping strategy? For example, is the appraisal that symptoms have been reduced a successful outcome or is it a form of denial (a coping strategy)? The individual processes involved in the self-regulatory model will now be examined in greater detail. However, symptom perception is not a straightforward process (see Chapter 12 for details of pain perception). For example, what might be a sore throat to one person could be another’s tonsillitis and whereas a retired person might consider a cough a serious problem a working person might be too busy to think about it. Pennebaker (1983) has argued that there are individual diﬀerences in the amount of attention people pay to their internal states. For example, Pennebaker (1983) reported that individuals who were more focused on their internal states tended to overestimate changes in their heart rate compared with subjects who were externally focused. Being internally focused has also been shown to relate to a perception of slower recovery from illness (Miller et al. Being internally focused may result in a diﬀerent perception of symptom change, not a more accurate one. Mood, cognitions, environment and symptom perception Skelton and Pennebaker (1982) suggested that symptom perception is inﬂuenced by factors such as mood, cognitions and the social environment. Mood: The role of mood in symptom perception is particularly apparent in pain perception with anxiety increasing self-reports of the pain experience (see Chapter 12 for a discussion of anxiety and pain). In addition, anxiety has been proposed as an explanation for placebo pain reduction as taking any form of medication (even a sugar pill) may reduce the individual’s anxiety, increase their sense of control and result in pain reduction (see Chapter 13 for a discussion of anxiety and placebos). In an experimental study, participants were exposed to low intensity somatic sensations induced by breathing air high in carbon dioxide. They were then told that the sensation would be either positive, negative or somewhere between and were asked to rate both the pleasantness and intensity of their symptoms.
Research needs to consider long-term as well as short- term effects and needs to catch up with consumer use levitra oral jelly 20mg without a prescription. The lack of drug interactions cheap levitra oral jelly 20 mg overnight delivery, low incidence of side effects and suggestive findings in small studies require additional research attention and counsel responsible consumer use as the data are being developed best order levitra oral jelly. Efficacy with bipolar disorder has not been studied at all, although the anecdotal evidence is positive. Aldini had experimented with galvanic head current as early as 1794 (upon himself) and reported the successful treatment of patients suffering from melancholia using direct low- intensity currents in 1804. At least six competing devices are on the market, of which five are pictured above. It should be noted, however, that the Smith monograph has not been peer-reviewed and that Dr. And while anxiety effects are well documented by the studies analyzed by Smith, most depression studies have been small and not double- 11 blind. A study by Nagata et al reported a significant reduction in sleep latency in insomniacs but not in those without sleep disorders. None of the studies identified in the literature review met all of these criteria. Some panel members expressed reservations about the panel’s overall response to this question based 14 on a lack of safety concerns. Response to treatment was defined as a reduction of ≥50% or more on the two Hamilton Depression Rating Scale measures. Devices were calibrated such that the power knob was to be turned up all the way for the required dose, and subjects were explicitly told to set the wheel to the maximum level. The ﬁrst 15 Hz modulating signal (to theoretically influence brain neurochemical activity) provides 50 ms of “on” time and 16. A second, 500 Hz modulating signal changes the “on” time series of 15,000 Hz carrier pulses (750 pulses in 50 ms) into 25 smaller bursts of 15 pulses each of the 15,000 Hz carrier signal, for 375 pulses in the same 50 ms. The consecutive positive burst and “off” time is followed by an equal and opposite negative burst and “off” time, balancing the direct current component to zero. Based on the current strength, subjects receiving active or sham treatment were not expected to feel any current and were told that they should feel nothing. In addition, quality-of-life scores also improved significantly in the active group but not in the sham group which may be associated with the decrease in depression symptoms and an improvement in functioning. Fibromyalgia, stress 22 and pain management have also been tested, with promising results. Bipolar disorder has not been studied at all, although the anecdotal evidence is positive. The only side effects noted by Brown were feeling "spacey” or “woozy" after the treatment and perceiving a flashing light after the session due to stimulation of the optic nerve by the device. It can be used to improve response to medications [adjunctive use], to reduce the dose of 31 medications, and sometimes to eliminate medications. As the literature reviews have shown, there is little consensus about any of 32 the characteristics. His scientific work was chiefly concerned with galvanism, anatomy and its medical applications. Other promising areas of research include treating the negative symptoms of schizophrenia. The absence of psychosis, younger age, and certain brain physiological markers might predict treatment success. Technical parameters possibly affecting treatment success include intensity and duration of treatment, but these suggestions 5 require systematic testing. Seizures are most likely in people with stroke or other disorders involving the central nervous system. Reports have stated that in at least some cases, predisposing factors (medication, brain lesions or genetic susceptibility) may have contributed to the seizure. Other promising areas of research include treating the negative symptoms of schizophrenia. These are fascinating findings in search of good clinical studies and needed developments in our understanding of the effects of various kinds of brain stimulation. This is comparable to commonly reported effect sizes of pharmacotherapeutic strategies for treatment of depression in the range of 0. Low folate levels have been associated with depression and dementia in some studies-- those studies need to be updated to take account of the widespread use of fortified grain products (required in the U. Folate issues Folate is easily inactivated by cooking and processing food, and folate levels may be affected by many other factors, including chronic disease, diabetes and other metabolic problems, cancer, smoking, alcohol use, poor diet, and medications such as mood stabilizers, L-dopa, statins, oral anti-diabetic drugs, and cancer chemotherapy. Thus, folate levels should be tested before more intrusive treatment is used for depression or mild cognitive impairment. Supplementation of folate deficiencies is recommended by five sources and only disavowed by one, the Natural Standard, and adjunctive treatment of depression with folate is a promising practice, especially for women, even if folate levels are not low. Although the Natural Standard concedes that folate has been used adjunctively, for enhancing treatment response to antidepressants, it does not credit the evidence in its rating. Two of the sources counsel supplementation even in the absence of folate deficiency, and while one leading researcher (Bottiglieri) does not explicitly concur with that recommendation, his description of the research would place him in the same camp. Another leading researcher (Mischoulon) does not view folate supplementation as effective in people with normal folate levels. Neuroprotection Researchers have observed some potential positive effects of folate and other B vitamins (B6 and B12 in addition to B9) on the aging brain, , but folate supplementation appears to be a promising practice only for mild cognitive impairment. Still, almost everyone should be sure to eat lots of leafy green vegetables (and fortified grains, if they are well tolerated)--especially as they get older and their appetites decrease and maladies multiply. However, the Natural Standard lists many medical conditions that may require folate supplementation and possible prescription drug interactions which should be considered by prescribing physicians. There appears to be no reason for children or pregnant or lactating women to avoid folate. Folic acid (also known as vitamin B9 or folacin) and folate (the naturally occurring form), as well as folinic acid (leucovorin), pteroyl-L-glutamic acid and pteroyl-L-glutamate, are forms of the water-soluble vitamin B9. Its biological importance is due to its production of L-methyltetrahydrofolate (known as methylfolate) and other derivatives after its conversion to dihydrofolic acid in the liver. Folate is essential to numerous bodily functions ranging from nucleotide biosynthesis to the remethylation of homocysteine. Children and adults both require folic acid in order to produce healthy red blood cells and prevent anemia. Folate and folic acid derive their names from the Latin word folium (which means "leaf"). Leafy vegetables are a principal source, although, in Western diets, fortified cereals and bread may be a larger dietary source.
Dual therapy is recommended to address the potential emergence of gonococcal cephalosporin resistance purchase generic levitra oral jelly canada. Challenges A major challenge to monitoring emerging antimicrobial resistance of N buy levitra oral jelly 20mg with mastercard. Culture testing is when the bacteria is first grown on a nutrient plate and is then exposed to known amounts of an antibiotic to determine the bacteria’s susceptibility to the antibiotic cheap levitra oral jelly uk. Currently, there is no well-studied reliable technology that allows for antibiotic susceptibility testing from nonculture specimens. Nearly half a million Americans suffered from Clostridium difficile infections in a single year. Isolation of soil streptomyces as source antibiotics active against antibiotic-resistant bacteria. Further investigations are needed in order to further determine the active metabolites of these isolates. Biofilm is a complex bacterial community that is highly resistant to antibiotics and human immunity. Antimicrobial resistance: The major contribution of poor governance and corruption to this growing problem. This usage leads to the development of resistant bacteria, which spread to people via the food chain and/or water. World Health Organization ranking of antimicrobials according to their importance in human medicine: a critical step for developing risk management strategies for the use of antimicrobials in food production animals. Dormant persister cells that are tolerant to killing by antibiotics are responsible for this apparent paradox. Persisters are phenotypic variants of normal cells and pathways leading to dormancy are redundant, making it challenging to develop anti-persister compounds. Biofilms shield persisters from the immune system, suggesting that an antibiotic for treating a chronic infection should be able to eradicate the infection on its own. We reasoned that a compound capable of corrupting a target in dormant cells will kill persisters. Our findings indicate a general principle for killing dormant cells—activation and corruption of a target, rather than conventional inhibition. Eradication of a biofilm in an animal model by activating a protease suggests a realistic path towards developing therapies to treat chronic infections. Some samples harbored other germs, including salmonella and staphylococcus aureus, two of the leading causes of foodborne illness in the U. Overall, 90 percent of the samples had one or more of the five bacteria for which we tested. Consumer Reports’ recent analysis of more than 300 raw chicken breasts purchased at stores across the U. In fact, we were conducting our research when news of the national salmonella outbreak linked to three Foster Farms chicken plants became public. In that case 389 people were infected, and 40 percent of them were hospitalized, double the usual percentage in most outbreaks linked to salmonella. Antimicrobial resistance: A global view from the 2013 World Healthcare-Associated Infections Forum. Its emergence rests on antimicrobial overuse in humans and food-producing animals; globalization and suboptimal infection control facilitate its spread. Immediate and coordinated measures must be taken worldwide to safeguard remaining antimicrobials and facilitate the development of novel antimicrobials. Bans on nontherapeutic antimicrobial consumption in livestock must be effectively championed despite strong resistance from industrial sectors. Conservation programs must be further optimized and implemented in other, non-acute healthcare settings such as long- term-care facilities. Educational programs targeting both antimicrobial prescribers and consumers must be further developed and supported. International collaboration among researchers and policy-makers must solidify to effect lasting reductions in the spread of antimicrobial resistance. Bacteria subsisting on antibiotics are phylogenetically diverse and include many organisms closely related to clinically relevant pathogens. It is thus possible that pathogens could obtain antibiotic-resistance genes from environmentally distributed super-resistant microbes subsisting on antibiotics. Regrettably, the use of these wonder drugs has been accompanied by the rapid appearance of resistant strains. The onus is on academia to furnish information on the multifunctional aspects of microbial network interactions that will provide the discovery tools of the future. It has not only hindered our treatment of infections but also dramatically reshaped drug discovery, yet its origins have not been systematically studied. Soil-dwelling bacteria produce and encounter a myriad of antibiotics, evolving corresponding sensing and evading strategies. They are a reservoir of resistance determinants that can be mobilized into the microbial community. Study of this reservoir could provide an early warning system for future clinically relevant antibiotic resistance mechanisms. Thanks to these broad-spectrum antimicrobial properties, silver has been extensively used for biomedical applications and other environmental disinfection processes for centuries. Effect of antibiotic therapy on the density of vancomycin-resistant enterococci in the stool of colonized patients. Limiting the use of such agents in these patients may help decrease the spread of vancomycin- resistant enterococci. This bacterium is an emerging opportunistic pathogen that is associated with rare but life-threatening cases of meningitis, necrotizing enterocolitis, and sepsis in premature and full-term infants. Triclosan exposure increases triclosan resistance and influences taxonomic composition of benthic bacterial communities. One notable change was a 6-fold increase in the relative abundance of cyanobacterial sequences and a dramatic die-off of algae within the artificial streams. Selection of cyanobacteria over algae could have significant implications for higher trophic levels within streams. Response plan to control and manage the threat of multidrug-resistant gonorrhoea in Europe. Clinical implications and treatment of multiresistant streptococcus pneumoniae pneumonia. The emergence of multidrug resistance among the latest generation of pathogens suggests that the discovery of new scaffolds should be a priority…Two factors exacerbate this supply problem by creating unique dis- incentives for antibiotic development. First, antibiotics are used in smaller quantities than other drugs…Antibiotics yield lower revenues than most drugs.
Once the study is underway purchase levitra oral jelly 20 mg line, the investigator’s The monitor reconciles investigational product staff must account for the use of the investigational shipped order 20 mg levitra oral jelly free shipping, dispensed and returned buy cheap levitra oral jelly 20 mg on line, arranges for ship- drug. Subjects should return unused medication ment of investigational product to core country or and empty containers to the investigator. The investigative sites, checks investigational product amount of drug dispensed and the amount used supplies at site against enrollment and withdra- by the patients are compared for discrepancies. Monitors must also check that inventory problems, implements tracking system drug supplies are being kept under the required for investigational product management on a study storage conditions. Failure to do so can result product supplies and ensures ﬁnal reconciliation in some of the data having to be discarded during of investigational product supplies. This issue can prove to be Good clinical practices require sponsors to be problematic when a single site is studying patients able to account for the drug supplies prepared and at different locations. Finally, the double-blind shipped to the investigator, the investigator’s use of code must not be broken except when essential those supplies and the return and destruction of for the management of adverse events. Planning drug supplies ing of treatment codes can make that patient’s data is a detailed and complex activity. Safety concerns are present throughout the drug Drug packaging should follow as consistent a development process. To be successful, monitors need to be com- Management of safety is a principal responsi- petent in bility of the sponsor monitor. The monitor has responsibility for informing the investigator basic medicine and therapeutics; about the safety requirements of the study. This will include a discussion of expected and unex- recognizing clinical signs and symptoms; pected adverse events, how to report adverse events should they occur and how to characterize interpretation of laboratory ﬁndings; the adverse events in terms of project-speciﬁc deﬁnitions. In source documents, safety issues The sponsor needs to provide ongoing review of may be uncovered in the progress notes of hospital safety data for investigational products. Monitors must be alert to exaggerated changes from baseline with expected pharmacolo- Closing down a study is important because it may gical effects, acute and chronic effects and multiple represent the sponsor’s last best chance to obtain drug treatment reactions. The study closedown Monitors are often the ﬁrst company representa- (closeout) visit usually occurs after the last subject tives to learn about an adverse event. The timeliness has completed the trial including any posttreatment of reporting the event to sponsor safety group is follow-up visits. Drug supplies should be recon- important in satisfying regulatory reporting require- ciled, and the integrity of the double-blind treat- ments. Failure to adhere to the reporting timelines clinical study report is available, it should be given required for regulatory authorities is evidence of to the investigator for signature. The sponsor trials, a single lead investigator may sign a pooled monitor is responsible for assuring adherence to study report. The cases must be While the goal of monitoring is to provide ‘clean’ followed to completion. Computerized checking programs including the intent-to-treat analysis population and edit checks make the process more value- and the safety data listings. Each module satisﬁes a speciﬁc drafting of assigned study report sections documentation need. The modules are generally according to the clinical study report prototype; organized as follows: interpretation of adverse events; Module I: Includes a basic summary of the study not unlike a publication. The clin- not just a summary but also a critical assessment of ical representative should be able to interpret clin- the clinical evaluation of the drug. The ability to report provides an independent assessment of the understand computer-generated clinical output and risk-to-beneﬁt ratio of the drug and its use. Quite apart from established in-house training Most vendors advertise widely in the trade programs, there is a wide selection of vendors journals, and many of their courses are tailored offering competency-based training. The format to meet the several certiﬁcations that are now of their programs may include: available in clinical research or regulatory affairs. A better almost every new chemical entity deviates from question, given the huge attrition rates in drug these general principles because special studies are development, might be: What governs whether a needed in pursuit of product-speciﬁc issues that are chemical becomes a medicine? Neither book covers all those disciplines and processes that can such custom-designed studies be generalized are needed for this putative transmogriﬁcation. This can also be called the ‘pre-marketing’ Regulatory affairs are so fundamental to precli- phase of the drug life cycle. It should be noted nical and clinical development that it deserves a that although all this is necessary, it is certainly section of this book to itself. Two major active relationship between regulation and the limitations then automatically arise. This is inten- smaller limitation is well illustrated by the disci- tional and again reinforces how an integrated pline of toxicology. In this case, the general prin- approach must be taken in drug development for ciples are fairly easily to enunciate, and have been there to be any chance at all of eventual success. In ancient directed at an identiﬁed pathological process, and/or times, and even today, tribal people knew the heal- speciﬁc receptors controlling these pathologies. The knowledge was accumu- safer, and are likely to have fewer adverse events lated through generations, recorded by chant and (side effects)ina largerpatient populationthanthose living memory and was derived largely from with multiple pharmacological properties. Although many of the drugs Research and development leading to a new, in use today were discovered by chance, most well-targeted pharmaceutical product is a long, drug discovery scientists engage in directed complex and expensive process. Historically, the research, based on a series of steps, each requiring cost of a new drug has been escalating by close to substantial scientiﬁc input. Average development some obvious, generally applicable milestones in time is 7–10 years, although some ‘blockbuster’ this process that facilitate the discovery of thera- drugs have taken 20 years. Targeted medicines and their Hence, the drug discovery and development implications process is a two-part exercise in mitigating the economic punishment to product sponsors while The understanding and use of medicines by physi- maximizing the probability that something that can ciansandhealershaveevolvedsigniﬁcantly,keeping be developed successfully is actually found. As few in step with technological and biological break- as 1% of promising lead molecules will be tested in throughs. From the use of herbal remedies to toxic human beings; fewer than one-third of those tested Principles and Practice of Pharmaceutical Medicine, 2nd Edition Edited by L. Some think that only about a half will produce ﬁnancial returns that modern biology as well as other ﬁelds have only are disproportionately higher than their costs of increased the numbers of ‘hits’ overall, whereas development. Larger companies will rarely fund inter- nal research for drug discovery of orphan drug All drug discovery projects depend on luck to be products (or products targeting diseases with few successful, but research and careful planning can patients). On the other hand, small market niche improve chances of success and lower the cost. These tools are drawn from the repertoires tiﬁed, and a particular therapeutic area chosen, the of modern biology, chemistry, robotics and com- biological research begins. In comparison with older pro- stage of drug discovery that anecdotal clinical cesses of in vivo screening of huge numbers of observations, empirical outcomes and ‘data’ from molecules, however, these innovations have not folk medicine are often employed, if only as beenassociatedwithshorteningof thedevelopment direction-ﬁnding tools. Human disease or pathology is usually multifac- Molecular targets are not always obvious, even torial, and the ﬁrst task of the researcher is to though cellular and histological disease patholo- narrow down the search by deﬁning the molecular gies have been well described in the literature. At mechanisms better; optimally this will be a small this point, the researcher returns to the labora- number of pathophysiologically observable pro- tory bench to design critical experiments (see cesses, for example the pinpointing of one or two Figure 4.
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