By S. Hamlar. Dickinson College.
The use of a low dose of a second drug toxic dose of one or both interacting drugs (Figure 13 cheap prandin 0.5 mg with visa diabetes medications metformin dosage. This that interrupts this negative feedback may therefore enhance is often not the case buy prandin 1 mg line blood glucose high in morning. Examples include the combination most clinical situations, is so non-toxic that the usual dose is of an angiotensin converting enzyme inhibitor (to block the more than adequate for therapeutic efficacy, yet far below that renin-angiotensin system) with a diuretic (the effect of which which would cause dose-related toxicity. Consequently, a second is limited by activation of the renin-angiotensin system) in drug that interacts with penicillin is unlikely to cause either treating hypertension (Chapter 28). Instances where clinically important consequences do One large group of potential drug interactions that are seldom occur on introducing a drug that displaces another from clinically important consists of drugs that displace one tissue binding sites are in fact often due to additional actions another from binding sites on plasma albumin or α-1 acid glyco- of the second drug on elimination of the first. However, the simple expectation that reduces the renal clearance of digoxin by a separate mech- the displacing drug will increase the effects of the displaced anism. This is because drug clearance 26) displaces warfarin from binding sites on albumin, and (renal or metabolic) also depends directly on the concentra- causes excessive anticoagulation, but only because it also tion of free drug. Consider a patient receiving a regular main- inhibits the metabolism of the active isomer of warfarin tenance dose of a drug. When a second displacing drug is (S-warfarin), causing this to accumulate at the expense of the commenced, the free concentration of the first drug rises only inactive isomer. Consequently, any increased effect of the displaced bleeding by causing peptic ulceration and interfering with drug is transient, and is seldom important in practice. These include: • Drug interactions may be clinically useful, trivial or • warfarin and other anticoagulants; adverse. They may also enable • digoxin and other anti-dysrhythmic drugs; toxic effects to be minimized, as in the use of pyridoxine to prevent neuropathy in malnourished • oral hypoglycaemic agents; patients treated with isoniazid for tuberculosis, and • xanthine alkaloids (e. The frequency and consequences of an adverse interaction • Many interactions that occur in vitro (e. Every individual has a peculiar set of characteristics increased elimination by metabolism or excretion and that determine their response to therapy. In a smaller hyperkalaemia and other causes of cardiac dysrhythmia, study in a chronic-care setting, the prevalence of adverse unwanted pregnancy, transplanted organ rejection, etc. Historically, it took several years for nephrologists to appreciate that epilep- Inactivation can occur when drugs (e. These adverse events proved to be due to an also interact in the lumen of the gut (e. Most have a simple mechanism consisting interactions should lead to their prediction and prevention by of summation or opposition of the effects of drugs with, study in early-phase drug evaluation. Drowsiness caused by an H1-blocking antihista- mine and by alcohol provides an example. It occurs to a Adverse drug interactions are diverse, including unwanted greater or lesser degree with all H1-blockers irrespective of the pregnancy (from failure of the contraceptive pill due to con- chemical structure of the particular drug used. Patients must comitant medication), hypertensive stroke (from hypertensive be warned of the dangers of consuming alcohol concurrently crisis in patients on monoamine oxidase inhibitors), gastro- when such antihistamines are prescribed, especially if they intestinal or cerebral haemorrhage (in patients receiving war- drive or operate machinery. In drugs, irrespective of the chemical group to which they one study, nine of 27 fatal drug reactions were caused by drug belong, because of inhibition of biosynthesis of vasodilator interactions. Thus, beta- reduction in lithium blockers and verapamil may precipitate heart failure if used clearance sequentially intravenously in patients with supraventricular tachycardia. Angiotensin Potassium chloride Hyperkalaemia Warfarin interferes with haemostasis by inhibiting the coagu- converting and/ or potassium- lation cascade, whereas aspirin influences haemostasis by enzyme inhibitor retaining diuretic- inhibiting platelet function. Aspirin also predisposes to gastric induced bleeding by direct irritation and by inhibition of prostaglandin E biosynthesis in the gastric mucosa. There is therefore the hyperkalaemia 2 potential for serious adverse interaction between them. These interactions are generally useful when used deliberately, for example, the use of naloxone to reverse opiate intoxication. This was mentioned above as a desirable means of above), drugs that influence gastric emptying (e. However, in some situations such control pramide, propantheline) can alter the rate or completeness of mechanisms are vital. The use of β-blocking drugs in patients absorption of a second drug, particularly if this has low with insulin-requiring diabetes is such a case, as these patients bioavailability. Drugs can interfere with the enterohepatic may depend on sensations initiated by activation of β-receptors recirculation of other drugs.
However discount prandin 1 mg free shipping diabetes mellitus definition pdf 2013, the actual investigation of death was under the control of an administrative ofcial known as a strategos buy prandin 2 mg insulin or medication diabetes. Tis individual had the authority to dispatch an assistant, known as a hyperete, and a physician to conduct an examination of a deceased person and render a report on their fndings. It seems that the relationship of the physician to the hyperete was of a subservient and second- ary nature, similar to that found in the modern coroner system. Somewhat ironically, greater progress in the medical investigation of death may have occurred afer the barbarian invasions of Rome in the ffh century A. Tese invading tribes intro- duced the concept of the weregeld, a type of compensation or “blood money” paid to the victim of a crime, or his family, by the assailant. Medical experts were utilized to assist the court in conducting these examinations, as documented in the legal codes of the era. Later, in Charlemagne’s Capitularies, the requirement for medical testimony in certain types of traumatic injury was required, but afer the death of Charlemagne it seems that progress in death investigation languished in the West for some time. In an efort to ameliorate the village’s problems and confrm the culpability of a particular corpse, the grave of the recently deceased was sometimes opened. On exhuming the body, typical changes of decomposition would be noted as expected, though they were misinterpreted as indicating something much more menacing than the normal dissolution of the body. Tis is the issue of a dark bloody fuid from the oral and nasal passages due to autolysis, putrefaction, and liquefaction of the internal viscera. Te resultant fuid is pushed out of the nose and mouth through the airways and esophagus by decompositional gas formation, which causes increased pressure within the thoracic and abdominal cavities. Tough now recognized as a common postmortem artifact, this purging pro- cess was taken to represent blood soiling of the mouth due to recent feeding on the blood of living victims. Further, with decomposition, the epidermis of the skin separates from the underlying dermis, resulting in so-called skin slip. Rather than being recognized as a decompositional change, this slip- page of the skin was attributed to the growth of new skin, and decomposi- tional bloating and red discoloration of the body were described as a healthy, ruddy complexion, compared with the sallow appearance of the deceased at the time of burial. As decomposition progresses, rigor mortis (or stifening of the extremities) disappears, but this suppleness of the limbs was considered a sure sign of vampirism. All of these factors were taken to indicate continued life beyond the grave, as well as nocturnal feasting on the blood of the living occupants of the village. Detailed methods of investigation were developed in order to confrm the identity of the “vampire,” and there were also pre- scribed procedures for warding of the revenant, and for putting it to rest permanently. Tese included such treatments as decapitation, “staking” the vampire through the heart, removal of the heart, cremation, tying the mouth shut, and reburial face down, presumably to confuse the undead when he or she attempted to rise from the grave. It seems difcult to believe that such misconceptions could occur, particu- larly as the phenomenon of postmortem decomposition should have been well known (refrigeration of decedents not being available in that era), but such is the case. And even though the beliefs in vampirism were manifestly erroneous by today’s standards, they do indicate a depth of concern about the process of death. Tey also show the development of a detailed investigative and empiric method, and the development of an internally coherent and systematic way of explaining observations and understanding death and its relationship to other death investigation systems 35 occurrences. Such internally consistent and systematic misinterpretations based on the best learning of the day should serve to give us pause when we become too certain of the validity of our own current positions. Another example of early death investigation, from an Eastern perspective, can be found in the book Hsi Yuan Chi Lu13 [Te Washing Away of Wrongs] (from China, circa 1247 A. Tis text gives detailed instructions on death investigation, and is probably the oldest extant full text on the topic. It includes discussions of decomposition, determination of time since death, homicidal violence, self-inficted injuries, various accidental deaths, and deaths due to natural causes. In spite of its antiquity, the similari- ties between the investigational methods taught in the book and those utilized today are ofen striking. Te frst instance of an ofcial ofce charged with the investi- gation of death, as we know it today, was probably the English coroner. Tese itenerant judges traversed the land to hear cases and dispense justice, but due to the long intervals between their visits (an average of seven years), it was necessary to have local ofcials perform careful investigations and keep records of ofenses so that the cases could efectively be brought before the justices when they fnally did arrive. Tis would not do, as many of them involved production of revenues for the monarch, at that time Richard the Lionhearted. Richard, a Norman king, was an absentee ruler with a penchant for expensive foreign wars that placed a heavy strain on the royal cofers.
Medical schools provide essentially no training in this area prandin 2 mg line diabetes insipidus nose spray, and even most pathologists receive only a superfcial introduction to the topic during their period of residency training cheap 0.5 mg prandin free shipping diabetes type 1 prognosis. Without training and experience, such physicians are in a very poor position to properly examine complex cases or to iden- tify subtle fndings that may indicate foul play in what initially appears to be a natural death. In other cases, a physician might be the director or an employee of a medical facility accused of being responsible for the death of a patient. Te death would then be investigated by the physician-coroner, with the attendant potential confict of interest. Independence from other agencies must be considered an absolute requirement for optimal death investigation. As early as 1928 the National Research Council stated bluntly that the ofce of coroner is anachronistic and “has conclusively demonstrated its incapacity to perform the functions customarily required of it. A recent report by the National Academy of Science also discusses inherent problems with the coroner system. Partially because of these shortcomings with the coroner system, the medical examiner system came into being. Te title of medical examiner is not a medical designation, but a governmental title, and it is defned difer- ently by various jurisdictions (usually at the state level). In 1877, the Massachusetts General Laws established physician medi- cal examiners in Sufolk County and the remainder of the commonwealth, appointed by the governor for seven-year terms. Tese physicians assumed the duties of the coroner, but only in the case of deaths known to have come about by violent means. Tese physicians also were not able to perform autopsies on their own authority, but required an order from another ofcial, such as the district attorney, to authorize this procedure. In the reformed system, the medical examiner took on all the investigative duties of the coroner, whose ofce was abolished. Deaths of prisoners or those not attended by physicians were also included in the medical examiner’s jurisdiction. When discussing the ofce of medical examiner, it is necessary to defne the term forensic pathology. Te term forensic derives from the Latin word forensis for “before the forum,” or relating to argument and discussion. Pathology is the study of disease, or a medical specialty devoted to the diagnosis of disease by laboratory means. Forensic pathology can be defned as the subspecialty of medicine devoted to the medical investigation of death. It is one of many components of the modern forensic sciences, and is a subspecialty of the medi- cal specialty of pathology. In the United States, training in forensic pathology death investigation systems 41 requires completion of a course of medical study, culminating in a doctor of medicine or doctor of osteopathy degree, completion of three or more years of residency training in anatomic pathology, completion of an accredited year of fellowship training in forensic pathology in an accredited training program (usually a large medical examiner’s ofce), and passage of national certifcation tests in both anatomic and forensic pathology, administered by the American Board of Pathology. Te physician can then use the title of forensic pathologist and is considered board certifed in that feld. Te formation of an academic specialty of forensic pathology owes much to early chairs of forensic medicine established in Europe and Scotland, but the frst endowed chair of legal medicine in the United States was established at the Harvard Medical School in 1937. Forensic pathology was frst recognized as a medical subspecialty in 1959, when examinations were administered and the frst cadre of physicians was certifed as forensic pathologists. Over the years, the medical examiner system has been refned somewhat to include some fairly standard elements. Forensic pathologists working under the direction of a coroner should not be referred to as medical examiners, since the coroner is the actual ofcial imbued with the authority to investigate and certify death, not a physician. In this way, the ofce of medical examiner becomes a professional position, not a political one, and the ofce holder is not concerned with currying favor with an electorate and periodically campaigning for reelection. Te sole authority for investigation and certifcation of deaths in his or her jurisdictional area, and is independent of law enforcement, pros- ecutorial, or judicial agencies. Only a trained and experi- enced physician has the knowledge to obtain and analyze such data and to synthesize a rational cause and manner of death conclusion from it. During the frst half of the twentieth century, medical examiner systems progressively replaced coroner jurisdictions throughout the United States.
The health problems that they did experi- ence were largely the result of the way in which they lived and the climate of Samoa buy prandin 1mg with mastercard diabetes type 2 disease process, which is hot and humid – a breeding ground for fungal and other infections as well as numerous biting insects purchase prandin 1 mg line diabetes insipidus yeast infection. Families lived in large units, in close proximity to each other, on a diet that, although quite varied, was defi- cient in many vitamins and other essential foodstuffs. Skin problems were thus very common as were various respiratory and gastrointestinal ailments. Those problems that had an obvious external cause were treated physically where possible or with herbal medicines. Those problems that were internal and/or had no obvious cause were thought to be the due to the displeasure of the gods (atua) or spirits of ancestors (aitu) and had to be treated by spiritual means, through the intercession of the spiritual healer (taulaitu). Western (or Palagi, foreign) diseases, the Samoans noted, could sometimes be treated with Palagi herbal medicines so it was after this time that Samoan plants were investigated more intensively by the local population for their ability to treat both Samoan and Palagi diseases. After a flurry of such investigations in the late nineteenth and early twentieth centuries, the situation settled into what it remains effectively today, with both Samoan and western medicine coexisting in relative harmony and Samoan people choosing to use local medicine for Samoan sicknesses and western ones for Palagi problems. Samoans believe that good health is dependent on a balance of three worlds: natural, social and spiritual. When these are out of balance, sickness ensues, the treatment depending on which of the three worlds is most out of line. If the condition is one that will respond to Samoan treatment, the patient or their family may use one of their own folk medicines or seek out a traditional healer (fofo). Leaves may be pounded or squeezed, and roots, barks and stems scraped into powders and applied as is or dissolved/ suspended in water. Traditional remedies The plant that is most frequently used in Samoan herbal medicine is the Indian mulberry (Morinda citrifolia), which is known in Samoa as nonu. This small tree, which is widely distributed throughout Polynesia, is used to 284 | Traditional medicine treat skin infections such as boils, styes and infected wounds. It has also been used to treat some respiratory and urinary tract infections (and the unpleasant odour of the fruit is thought to repel the spirits responsible for causing certain ailments). Many of these effects are supported by in vitro and in vivo studies and, more recently, by a number of clinical trials. Another plant that has been used traditionally – although only occasion- ally – as an infusion of crushed leaves or bark to treat urinary and gastro- intestinal infections is mamala, Homalanthus nutans (formerly known as Omalanthus nutans). The active ingredient in the plant was identified as a protein kinase C compound, prostratin. Other plants that are found mainly in Samoa and used medicinally are fue manogi (Piper graeffei), a sweet-smelling tree climber that is used to treat mouth ulcers, sore throats and infected wounds (especially if the latter have been caused by spirits), and matalafi (Psychotria insularum), which is used to treat many different conditions, whether these are believed to be caused by aitu or natural means. Infusions of matalafi bark are rubbed onto the skin to treat inflammation and infected wounds and, as indicated by its botanical name, to alleviate ‘possession’ by driving away the causative spirits. Many plants that are used in Samoa are also found in other Pacific island countries and are generally used for the same purpose in each. Thus Samoan people, similar to those in Fiji, are also familiar with the actions of Piper methysticum and Mikania micrantha, although these are known in Samoa as ava and fue saina respectively. Samoan medicine, including herbal medi- cines, still has an important place in Samoan society, coexisting harmoniously alongside western medicine even though some of the treatments used appear to owe as much to the placebo effect of the healer as to the medicines them- selves. The value to the community of these medicines has been recognised by government and other agencies because they work to slow down the loss of native forests and thus the plants of medicinal as well as other economic importance. New Zealand As was the case in the other countries described in this chapter, the health of the Maoris of New Zealand was not improved by the arrival of the British settlers. Indeed, there were fears in the late nineteenth century that the Maori population might disappear altogether, so severely had they suffered from the many epidemics produced by strains of unfamiliar microorganisms. Fortu- nately this did not eventuate and New Zealand’s Maori numbers continue to increase each year. However, the health of Maoris is not as good as that of those of European descent. The reasons for this disparity in health status are hotly debated but do appear to be the result of a combination of socio- economic and cultural factors. From the arrival of the settlers in the mid- nineteenth century until about the middle of the twentieth century, most Maoris lived on the ancestral lands, close to families.