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Weight-loss period. These results are shown in Figure 2. Treatment with 120 mg orlistat 3 times daily for 1 y resulted in significantly less weight regain than treatment with placebo. Subjects in the 120-mg orlistat group regained approximately half as much weight as did those in the placebo group. Categorical analysis of weight regain across 4 percentage weight regain quartiles Table 3 ; indicated significant treatment differences between 120 mg orlistat and placebo P 0.001 ; . A higher percentage of subjects in the 120-mg orlistat group than in any other group regained 25% of lost body weight after 1 y. In contrast, the frequency of a large amount of weight regain 75% weight regain ; was significantly lower in the 120-mg orlistat group than in the 30-mg orlistat and placebo groups. Further analysis of the subjects who regained 25% of lost body weight indicated that 23.5% of subjects who received 120 mg orlistat did not regain any weight or actually continued to lose weight after the randomization step, compared with only 16.3% of subjects in the placebo group. Moreover, at the end of the 1-y.
Fig. 3. In vitro simulation of meal lipolysis in the presence and absence of Orlistat. A: experimental device used for incubating the meal with juices and bile or with purified lipases. BD: diagrams illustrating the release of free fatty acids as a function of time during control experiments B ; and experiments performed with Xenical pellets C ; and micronized Orlistwt powder D.
Placebo + lifestyle changes 100 80 Patients % ; 60 40 20 IGT to normal glucose tolerance Orlisat + lif estyle changes p 0.04 10 8 Patients % ; 6 p 0.04 2 0 IGT to type 2 diabetes 3.0% 7.6!
Do not take orlistat without first talking to your doctor if you are breast-feeding a baby.
Technique for transplanting pancreas cells The Immune Tolerance Network ITN ; , an international consortium of researchers, will soon begin testing a technique for transplanting insulin-producing pancreas cells that could allow people with type-1 diabetes to stop their insulin shots. Later this year ITN will spend US$5 million to expand research on the technique, known as the Edmonton protocol, to other US and Canadian research centres. ITN is part of a programme spearheaded by the National Institute of Allergy and Infectious Diseases. Diet drug doubt The diet drug orlistat Xenical ; has been associated with 13 cases of hypertension, which have been reported to the manufacturer, Roche Pharmaceuticals, according to researchers from the Karolinska University Hospital, Stockholm, Sweden. Roche has said there is no evidence to to support a relation between treatment with orlistat and the development of hypertension and ovral.
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Zanamivir NICE recommends that Zanamivir is prescribed when influenza is circulating in the community for the treatment of `at risk' adults. Effective targeting of Zanamivir for the `at risk' adult population with a high incidence of true influenza is essential to maximise both the clinical and cost effectiveness of this therapy. Drugs Used for Dementia Donepezil, Rivastigmine and Galantamine ; NICE recommends that Donepezil, Rivastigmine and Galantamine should be made available after assessment to people with mild to moderate Alzheimers disease as one component of their management. Treatment is subject to regular review Riluzole NICE recommends that Riluzole be used to treat patients suffering from the Amyotrophic Lateral Sclerosis form of Motor Neurone Disease. Oristat NICE recommends that Orlisstat should be available as one part of the management of obesity. This drug should be prescribed only as part of an overall treatment plan for management of nutritional obesity in people aged 18 75 years. Sibutramine This drug is used in obesity of adults aged 18 - 65, and should be prescribed in the same circumstances as outlined above. COX II Inhibitors Cyclo-Oxygenase II Inhibitors ; Selective inhibitors of Osteoarthritis and Rheumatoid arthritis as anti-inflammatories with lower risk of upper gastrointestinal problems. Nicotine Replacement Therapy and Bupropion NICE recommends the use of Bupropion and NRT as part of a withdrawal programme for smokers over 18 with no relevant contraindications who are willing to set a quit date. Somatropin Used to treat deficiency of growth hormone and chronic renal insufficiency in children. Atypical Antipsychotic Drugs NICE recommends that atypical antipsychotic drugs are used in newly diagnosed schizophrenia and in patients who are either inadequately managed or suffer unacceptable side effects on traditional antipsychotics and periactin.
In many industrialized nations, obesity is now considered an epidemic, resulting in accelerated morbidity and mortality. Obesity is associated with an increased risk of coronary artery disease as well as the metabolic syndrome comprised of abdominal obesity, increased fasting blood glucose, dyslipidemia and hypertension, which are all recognized cardiovascular risk factors. Diet, exercise, and lifestyle changes constitute important recommendations for treatment. Unfortunately, although effective in some individuals, these recommendations have proven to be ineffective in adequately addressing the broad, enlarging scope of this public health problem. Drug treatment is often indicated but is somewhat limited by the minimal number of well tolerated drugs that have proven to have long-term efficacy in maintaining bodyweight loss. For example, phentermine may result in modest bodyweight loss through suppression of appetite, but potential cardiovascular adverse effects exist and the efficacy is mainly short-term. Sibutramine, an inhibitor of serotonin and norepinephrine noradrenaline ; reuptake, may increase satiety and result in modest bodyweight loss. However, cardiovascular adverse effects may occur in susceptible patients. Nonetheless, sibutramine is one of the few drugs that has been approved by the US Food and Drug Administration FDA ; for bodyweight loss. Orlistat, a lipase inhibitor, is also approved by the FDA for bodyweight loss but may have bothersome gastrointestinal adverse effects, especially among patients who do not adhere to the recommended low-fat diet. Ongoing studies continue to evaluate other obesity drug treatments that may result in bodyweight reduction through a number of different mechanisms. It is anticipated that the development of effective and well tolerated antiobesity drugs will elevate the pharmacologic treatment of obesity to the status of other cardiovascular risk factors and metabolic disorders. This may be especially important given that dyslipidemia, hypertension and type 2 diabetes mellitus are often secondary to, or exacerbated by, obesity.
Table 2. Chronological presentation of the measurements performed on days 1 and 2 and pioglitazone.
RESULTS A total of 1313 subjects were enrolled in the study and entered the 6-mo lead-in weight-loss period. The main reasons for withdrawal during the weight-loss period were failure to meet the 8% weight-loss goal 35% ; , lost to follow-up 27% ; , failure to keep appointments 14% ; , noncooperation 9% ; , and protocol violation 9% ; . An 8% reduction in initial body weight was achieved by 729 56% ; subjects who were subsequently stratified by weight loss and randomly assigned to receive 120 mg orlistat n 181 ; , 60 mg orlistat n 173 ; , 30 mg orlistat n 187 ; , or placebo n 188 ; 3 times daily for 1 y. A total of 537 74% ; subjects completed the 1-y treatment phase of the study 120 mg orlistat, n 126; 60 mg orlistat, n 133; 30 mg orlistat, n 140; placebo, n 138 ; . Seven subjects were excluded from the safety analysis because of no follow-up assessment and 2 subjects were excluded from the intent-to-treat population because of no follow-up efficacy assessments. The characteristics of the 4 treatment groups were not significantly different at the start of the 6-mo lead-in weight-loss period Table 1 ; , with the exception that body weight was higher in the 60-mg orlistat group although body mass index was not significantly different ; than in the other 3 groups. There were more men.
Changes you can maintain for the long haul when you're considering weight loss. Regular exercise and a reducedcalorie diet are key factors -- even for those who take prescription weight loss medications. The medications sibutramine Meridia ; and orlistat Xenical ; are two examples of prescription medications approved by the U.S. Food and Drug Administration FDA ; for long-term weight loss in people who are significantly obese and those who have less severe forms of obesity with other risky health conditions, such as diabetes and high blood pressure. Meridia is an appetite suppressant that works by inhibiting reuptake of serotonin, dopamine and norepinephrine, brain chemicals that affect mood and appetite. The medication tricks you into believing that you're not hungry or your stomach is full. Xenical is a fat absorption inhibitor that works by blocking about 30 percent of dietary fat from being absorbed. The unabsorbed fat is eliminated through normal bowel movements. Both medications are moderately effective, leading to an average weight loss of 5 to pounds over a one-year period. Keep in mind, however, the response to these medications may vary. Some people experience more weight loss than others. Also, the effective dose for these medications is determined on an individual basis, often starting at a low dose with subsequent adjustments as needed and piracetam.
How well it works one study reports that: 1 about 30% of people who took orlistat for 12 to 18 months lost 10% or more of their weight.
IV. The National Literacy and Health Program: An Overview. 8 and piroxicam.
Collected from all the patients attending selected clinics between August and October 2001 ; , for HIV testing, which was not linked to the routine clinical care of the patients. The sample was obtained from a total of 320 sites, out of which 170 were antenatal clinics ANCs ; , 135 were STD clinics, 13 sites among IDUs and 2 sites of MSM. Data obtained from the ANC sites showed the sero-prevalence varying between 0-1.8 percent. Information available from 10 IDU sites showed that HIV positivity among IDUs varied between 1.4 percent Meghalaya ; and 56.3 percent Manipur ; . According to UNAIDS about 80 percent of all new HIV infections occured through sexual transmission, about 8 percent through perinatal transmission, about 6 percent through injecting drug use IDU ; and another about 5 percent through blood transfusion UNAIDS 2000 ; . NACO proposed that districts and or states of India could be categorised as high low prevalence naco.nic.in ; . During the time of carrying out this survey, UNAIDS projection showed that sero positivity among adults in India was 0.7 percent unaids ; . Deaths due to drug overdose were also reported from areas where IDU is common. While no national statistics on drug-related deaths are available, some studies have reported poisoning and overdose as seen in the casualty or emergency rooms of large hospitals. In 1993, in a study of 235 subjects, 5 percent of admissions were due to benzodiazepine overdose and 2 percent due to cannabis Aggarwal et al 1994, because www orlistat.
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After 1 year of treatment, the patients in the orlistat group lost 2% of their initial body weight vs 3% in the placebo group p 001 and pletal.
However, orlistat enhanced the bioavailability plasma concentrations increased by approximately 30% ; and lipid lowering effect of pravastatin.
Experimental limitations Before considering our findings in greater detail, we should stress some of the limitations of our experimental approach. First, without histological verification of electrode site or support from post-operative imaging, placement in STN should be considered presumptive, even though the surgical coordinates were those of STN. For this reason we have used the conservative terms subthalamic area SA ; and subthalamic area macroelectrodes SA-MEs ; throughout to refer to the positioning of the macroelectrode contacts in the STN and adjacent areas, such as the field of Florel and the zona incerta. The conclusion that the macroelectrodes were in the SA is supported by the effectiveness of intra-operative and chronic post-operative stimulation and by the ability to significantly reduce antiparkinsonian medication post-operatively. Authors are divided as to whether these therapeutic effects involve stimulation of the sensorimotor STN or the area slightly dorsal to the STN, which includes the field of Florel and the zona incerta, but the presence of the effective stimulation target within the SA is not in dispute Saint-Cyr et al., 2002; Voges et al., 2002 ; . Equally, the argument as to whether stimulation effects in the SA involve nuclear effects or white matter bundles is not germane to the present findings, as LFPs are likely to be the product of synchronized EPSPs and IPSPs, and not due to spontaneous activity in white matter Magill et al., 2004a, b ; . The significant increase in coherence between EEG and LFPs from rostral to caudal contacts of the SA-MEs and the predominant use of caudal contacts for clinical stimulation also suggests that the surgery was consistent in achieving similar placement across patients, with contact 1 intended to be in STN. In addition, the SA-ME LFP activities reported here as coherent with EEG have been reported in other studies of neuronal synchronization within the STN of the parkinsonian human, where targeting has been supported by microelectrode recordings and or post-operative imaging, or within the STN of the parkinsonian rat or monkey, where placement has been confirmed histologically Bergman et al., 1994; Levy et al., 2000, 2001, 2002a, b; Marsden et al., 2001; Brown et al., 2001; Cassidy et al., 2002; Priori et al., 2002; Williams et al., 2002; Kuhn et al., 2004; Sharott et al., 2004 ; . In particular, a recent study using microelectrode recordings has shown that beta frequency band LFP activity is focal to the STN Kuhn et al., 2005 ; . Second, the question arises to what extent was the coherence between SA LFPs and EEG due to coupled oscillatory activity or the volume conduction of synchronous activity from sources such as the cerebral cortex. Unlike Wennberg and Lozano 2003 ; , we used bipolar recordings from the contacts of our macroelectrodes, thereby avoiding a common scalp reference that may have contaminated depth signals with cortical EEG. In addition, as mentioned above, recordings from adjacent macroelectrode contact pairs showed a clearly increasing rostral to caudal gradient inconsistent with volume conduction of cortical activity. Furthermore, there were significant temporal differences between the cortical and depth signals that and premphase.
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In fact, approximately 97% of the administrative dose of orlistat was found excreted in the feces, 83% of that was found to be chemically unchanged orlistat and propranolol and orlistat.
Drugs Excluded From Coverage The Medicaid program excludes the following drugs and or therapeutic categories from coverage: Anorexics Medicaid does not reimburse for anorexics with the exception of orlistat; Note: Refer to Section 37.5.6 for program restrictions. Compounded prescriptions mixtures of two or more ingredients; the individual drugs will continue to be reimbursed.
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Binding of [125I]-BOP was used to visualize TP receptors autoradiographically, with the method adopted for the endothelin receptors Maguire & Davenport, 1999 ; . Cryostat tissue sections were incubated with 0.1 nM [125I]-BOP in the absence or presence of SQ29548 1 mM ; under the conditions described above. Dried sections were apposed to radiation sensitive lm Hyperlm bmax, Amersham Pharmacia Biotech., Bucks, U.K. ; along with 125I miroscale standards.
Micheline Piquette-Miller is an Associate Professor of Pharmacy and Pharmaceutical Sciences at the University of Toronto. She studied Pharmacy as an undergraduate and received her Ph.D. in Pharmacokinetics 1994 ; at the University of Alberta supervisor: Dr. Jamali ; . Micheline completing a Post-Doctoral Fellowship in the area of molecular pharmacology supervisor: Dr. Giacomini ; at the University of California in San Francisco, then joined the University of Toronto in 1996. She presently teaches in the areas of pharmacokinetics; topics in pharmaceutical industry and drug development. Dr. Piquette-Miller's research examines the cellular and molecular basis for variability in drug response. Specifically, this has focused on understanding the mechanisms responsible for alterations in the expression of drug transport proteins and their resulting impact on drug disposition. This work is used to solve critical issues in chemo-responsiveness of tumors, variable drug response and prediction of drug-disease interactions. Micheline PiquetteMiller is a member of numerous national and international societies and serves as a reviewer for a number of pharmaceutical journals and granting agencies. She presently serves as Chair of the Pharmacogenetics and Molecular Pharmacology section of ASCPT, on the Board of Directors of the Canadian Society of Clinical Pharmacology and is on the Executive Council of the Canadian Society of Pharmaceutical Scientists. She has also been the recipient of several awards including the Rx &D Health Research Foundation-CIHR Research Career Award 2000 ; , the Alberta Women's Science Network "Mentor of the Millennium" 2000 ; , the Pfiasky Young Investigator Award 2003 ; , and the University of Alberta Horizon Award 2003 ; and Toronto Institute of Technology's Award of Excellence in Pharmaceutical Research 2003.
Have undergone regular screening can discontinue if results have been consistently normal over the years. 3. Interval between screens: Interval can be extended to as long as 3 years if 2 or consecutive tests have been normal. Annual examinations are recommended for high risk groups: first sexual intercourse younger than age 18; multiple partners or a consort with multiple partners; smoking; low socio-economic status; immunodeficiency 4. HPV testing: Newer methods of HPV detection have led to increasing interest in the role of testing for HPV. One of the most promising uses is to determine which women with low-grade cytologic abnormalities require colposcopic evaluation. HPV can help determine which women who have a single smear showing atypical squamous cells of undetermined significance ASCUS ; should undergo colposcopy. "At present, the role of HPV testing as an adjunct to, or substitute for, established and effective cytologic screening programs has not been evaluated adequately." 5. After hysterectomy: Women who have undergone total hysterectomy for reasons other than cervical neoplasia should no longer be screened. NEJM May 24, 2001; 344: "Clinical Practice", first author George F Sawaya, University of California, San Francisco. nejm Comment: 1 I would like to know if HPV is the only cause of cervical cancer. I doubt it. This begins a NEJM feature highlighting common clinical problems. Evidence supporting various strategies is presented, followed by formal guidelines when they exist, and the authors' clinical recommendations. RTJ REFERENCE ARTICLE 5-11 AUTOMATED SPHYGMOMANOMETRY: AMBULATORY BLOOD PRESSURE MEASUREMENT Recently, the accuracy of conventional Riva-Rocci Korotkoff technique of BP measurement has been questioned. Efforts have been made to improve the technique with automated devices. Newer applications include repeated measurements using traditional techniques, self-measurement of BP at home, and ambulatory BP measurements. This article discusses ambulatory BP measurement ABPM ; : which monitor to buy it must be validated independently what type of ABPM service to set up in the clinician's office, or in a hospital service; and training requirements the technique requires experience and training ; . Nurses can be trained to give excellent service. Clinical indications for measuring ABP, features of white coat hypertension, ABPM in the elderly, resistant hypertension, and ABPM to guide treatment are also discussed.
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They state that there have been 99 raw reports of pancreatitis for orljstat but say that placebo-controlled trials of orkistat in patients treated for 2 years showed no increase in incidence of pancreatitis and ovral.
Renal transplantation is the most cost-effective form of treatment for patients in end stage renal failure ESRF ; . Unfortunately, the supply of donor organs, which averages only 30 pmp per year in the United Kingdom, is greatly outstripped by demand which is 42 pmp per year or higher, depending upon the criteria used for selection of patients 4.1. Donor organs are an extremely valuable resource which must be used optimally. It is important that equity of access to transplantation be achieved both in geographical terms and for those with uncommon blood groups or HLA types. However, these two goals may conflict. Although firm guidelines for the investigation of potential transplant recipients have not yet been determined, it is essential that appropriate data be collected during pre-transplant investigation to allow definitive criteria to be drawn up in the future. This applies particularly to cardiovascular disease, where some investigators have argued the case for intensive investigation of the cardiovascular system in all potential transplant recipients. 4.2, 4.3. At present, the major absolute contraindications to transplantation are uncontrolled cancer, uncontrolled HIV infection, other active systemic infection including TB, and any condition with a life expectancy 5 years 4.3. Chronological age by itself, at least up to 70 years, is not a major factor in determining the short-term 5-year ; survival of grafts 4.4, 4.5. An increase in deaths in elderly patients with a functioning graft is counterbalanced by a lower rejection rate in the elderly. However, it is obvious that the outlook for older recipients must be poorer in the long term. To deal with these uncertainties, regular meetings between transplant and dialysis staff need to be held to review the suitability for transplantation of patients at especial risk of deterioration in general health. The median waiting time on a transplant waiting list is approximately 500 days for those who receive a transplant 4.1. There are differences relating to age, ABO blood group, and HLA specific antibody status. Of all the patients on the UK renal transplant waiting list, 14% have been waiting more than five years and 18% of these patients are not sensitised to HLA antigens.
Carprofen has been shown to be effective in controlling post-operative pain in dogs and cats when given before or after the surgery 4 mg kg, single intravenous or subcutaneous dose ; Nolan and Reid 1993, Lascelles et al., 1994, Lascelles et al., 1995, Welsh et al., 1997, Balmer et al., 1998, Lascelles et al., 1998, Slingsby and Waterman-Pearson 2001, Laredo et al., 2004 ; . However, it is unclear whether pre-operative administration of carprofen decreases the anaesthetic requirements of injectable and volatile anaesthetics i.e. whether it has an anaesthetic sparing effect or not. It has been suggested that pre-operative administration of carprofen reduces the amount of isoflurane, as reflected by MAC minimal alveolar concentration ; , needed for anaesthesia in dogs Ko et al., 2000 ; . These authors assumed that the data provide a strong indication that carprofen may in fact have an effect on the MAC of isoflurane in dogs, even though the differences between carprofen and control group were not significant in their study. They suspected that the inability to detect a significant decrease in MAC was the small sample size.
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That's the conclusion of a new study from the uk that tested the drug, orlistat xenical, hoffman laroche ; against metformin glucophage, glucophage xr, bristol-myers squibb ; , a diabetes medication that's being evaluated as a therapy for pcos medications compared head-to-head in the small open-label study, vijay jayagopal, md, in the department of medicine at the university of hull in the uk and his colleagues tested the outcome of using orlistat in comparison to metformin in a group of 21 obese women who had previously been diagnosed with pcos.
Abstract In vitro, e-polylysine EPL ; strongly inhibited the hydrolysis of trioleoylglycerol emulsified with phosphatidylcholine PC ; and taurocholate by either pancreatic lipase or carboxylester lipase. The EPL concentration required for 50% inhibition of pancreatic lipase, 0.12 mM, was eight times lower than the concentration of orlistat required for the same effect. The 50% inhibition concentration by EPL was affected by emulsifier species: it was increased z150 times, 70 times, and 230 times on gum arabic, phosphatidylserine, and phosphatidic acid emulsion, respectively, compared with PC emulsion. The 50% inhibition concentration by orlistat was little changed by emulsifier species. Gel-filtration experiments suggested that EPL did not bind strongly to pancreatic lipase, whereas orlistat did. To test the effect of EPL on obesity, mice were fed a high-fat diet containing 0.1, 0.2, or 0.4% EPL. EPL prevented the highfat diet-induced increase in body weight and weight of the liver and visceral adipose tissues epididymal and retroperitoneal ; . EPL also decreased plasma triacylglycerol and plasma cholesterol concentrations and liver triacylglycerol content after they had been increased by the high-fat diet. The fecal weights of mice were increased by the high-fat diet containing EPL compared with the high-fat diet alone. Fecal lipid was also increased by the diet containing EPL. These data clearly show that EPL has an antiobesity function in mice fed a high-fat diet that acts by inhibiting intestinal absorption of dietary fat.--Tsujita, T., H. Takaichi, T. Takaku, S. Aoyama, and J. Hiraki. Antiobesity action of e-polylysine, a potent inhibitor of pancreatic lipase. J. Lipid Res. 2006. 47: 18521858.
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With control over the development of a fatty liver, orlistat may soon become an effective therapeutic medication in treating other liver complications.
Common adverse effects occur more frequently with sibutramine especially an increase in blood pressure and heart rate ; , but no serious adverse events were reported.31 Orlitsat causes gastrointestinal fecal urgency, flatulence, and oily spotting in 22% to 27% of people taking the drug.31 The long-term safety 2 years ; of sibutramine and orlistat is unknown. Surgical procedures are followed by procedure-specific complications eg, wound infection, staple failure, and leakage ; , but are rarely fatal mortality was less than 1% of patients in pooled samples ; .3 The jejuno-ileal bypass is no longer recommended because of excessive malabsorption.25 Reoperation is necessary within 5 years in up to 25% of patients, and patients require long-term follow-up and multivitamin supplementation.3 RECOMMENDATIONS OF OTHERS The Canadian Task Force on Preventive Health Care finds insufficient evidence to recommend for or against BMI measurement in the periodic health examination of the general population and found insufficient evidence to recommend for or against community-based obesity prevention programs.24 The American Academy of Family Physicians40 and the American College of Obstetricians and Gynecologists recommend periodic measurements of height and weight. NIH has a 2-step guideline of assessment and treatment management of overweight and obese individuals.26 The American College of Preventive Medicine recommends periodic BMI measurement of all adults and diet and exercise counseling of all adults irrespective of BMI ; and endorses NIH management guidelines.41 The American Diabetes Association has published a position statement that recommends the use of intensive lifestyle modification programs along with standard weight loss strategies for long-term weight loss and maintenance.42 REFERENCES 1. 2. 3. U.S. Preventive Services Task Force. Guide to Clinical Preventive Services. 2nd ed. Washington, DC: Office of Disease Prevention and Health Promotion; 1996. McTigue K. Screening and interventions for obesity in adults: a summary of the evidence for the U.S. Preventive Services Task Force. Ann Intern Med. 2003; 139 11 ; : 933-949. McTigue K, Harris R, Hemphill MB, et al. Screening and Interventions for Overweight and Obesity in Adults. Systematic Evidence Review No. 21 Prepared by the Research Triangle Institute-University of North Carolina Evidence-based Practice Center under Contract No. 290-97-0011 ; . Rockville, MD: Agency for Healthcare Research and Quality. December 2003. Available on the AHRQ Web site at: ahrg.gov clinic serfiles ; . Centers for Disease Control and Prevention: Department of Health and Human Services. Health, United States, 2000. National Health and Nutrition Examination Survey NHANES ; . CDC, 1999. Roe DA, Eickwort KR. Relationships between obesity and associated health factors with unemployment among low income women. J Med Womens Assoc.1976; 31 5 ; : 193194, 198-199, 203-204. Wolf AM, Colditz GA. Current estimates of the economic cost of obesity in the United States. Obes Res. 1998; 6 2 ; : 97-106. Gray DS, Fujioka K. Use of relative weight and body mass index for the determination of adiposity. J Clin Epidemiol. 1991; 44 6 ; : 545-550.
Above 5 kg was associated with a graded decrease in the risk of diabetes mellitus 5. A second cohort study of 28, 388 overweight women aged 40 to 64 years found that intentional weight loss of more than 9.1 kg was associated with a 25 percent decrease in all-cause, cardiovascular and cancer mortality 6. In addition, any amount of intentional weight loss was associated with a ten percent reduction in cardiovascular disease, a 20 percent reduction in all-cause mortality, a 30 to 40 percent reduction in mortality from diabetes, and a 40 to percent reduction in mortality from cancers related to obesity among 15, 069 women with co-morbid conditions such as heart disease or diabetes mellitus. Weight loss lowers blood pressure in more than onehalf of treated subjects 7. On average, the blood pressure falls 0.3 to 1.0 mmHg for every 1.0 kg of weight that is lost. Those who maintain weight loss maintain lower blood pressure than those who regain weight.8 Weight loss also is associated with a decreased risk of osteoarthritis. In a study of 800 women, a decrease in BMI of 2 kg more during the previous ten years decreased the odds for developing osteoarthritis by over 50 percent.9 This benefit extended to women with a high risk for osteoarthritis due to a high baseline BMI 25 kg m2 ; Finally, the social stigma associated with obesity leads to decreased quality of life. Weight loss has been shown to improve both social functioning and quality of life 10, 11. Treating obesity Behavior modification, diet, and exercise are the primary treatments for obesity. More aggressive therapy with medications orlistat, sibutramine ; may be indicated for patients who have medical complications of obesity, but drug therapy is limited by side effects. Regaining lost weight is a common problem in treating obesity. Of those subjects who lose weight during any treatment program, most do not maintain the weight loss. Identification of those subjects who will succeed in losing weight is difficult. Characteristics of patients who maintain weight loss include a weight loss of more than two kilograms in four weeks, frequent and regular attendance at a weight loss program, and the subject's belief that his or her weight can be controlled. Systematic reviews of behavioral and drug therapy report average long-term weight loss of between four and seven kilograms 12-15. Gastrointestinal surgery for obesity Surgery is another option for patients at high-risk of complications from obesity. A recent systematic review and meta-analysis concluded that patients achieved effective weight loss with surgery and that most patients had complete resolution or improvement of their diabetes, hypertension, hyperlipidemia, and obstructive sleep apnea.16 Indeed, surgical interventions for obesity are increasingly popular in the United States. Between 1998 and 2004, the number of bariatric surgeries performed increased from about 13, 000 annually to 121, 000, a nine-fold increase.17 Over the same period, inpatient mortality associated with bariatric surgery decreased from 0.89% to 0.19% and the average length of stay decreased from five to 3.1 days.17 These secular trends highlight the need for a high quality evidence base for advising patients and.
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Following are summaries of articles from Annals of Internal Medicine. Medical Student Members can get full access to Annals Online by registering at annals . Recommendation 1: Clinicians should counsel all obese patients defined 2 as those with a BMI 30 kg m ; lifestyle and behavioral modifications such as appropriate diet and exercise, and the patient's goals for weight loss should be individually determined these goals may encompass not only weight loss but also other parameters, such as decreasing blood pressure or fasting blood glucose levels ; . The U.S. Preventive Services Task Force recommends that clinicians offer all obese patients intensive counseling and recommends behavioral interventions, such as diet and exercise, to promote sustained weight loss. Moreover, the Task Force states that although there is no direct evidence that behavioral interventions decrease mortality or morbidity from obesity, changes in intermediate outcomes due to modest weight loss, such as improved glucose metabolism, lipid levels, and blood pressure, provide indirect evidence of health benefits. Since these intermediate outcomes may be of as much importance to a patient as the actual amount of weight lost, the ACP felt that they should also be considered when setting desired goals for a weight loss regimen. Recommendation 2: Pharmacologic therapy can be offered to obese patients who have failed to achieve their weight loss goals through diet and exercise alone. However, there needs to be a doctorpatient discussion of the drugs' side effects, the lack of long-term safety data, and the temporary nature of the weight loss achieved with medications before initiating therapy. The amount of extra weight loss attributable to weight loss medications is modest 5 kg at year ; . However, in trials studying the effects of diet and exercise in obese patients with impaired glucose tolerance, similar amounts of weight loss significantly decreased progression to type 2 diabetes mellitus 16 ; . In other studies, similar amounts of weight loss positively influenced other obesity-associated cardiovascular risk factors, such as lipid levels and hypertension 17, 18 ; . Therefore, although trials of weight loss drugs have not looked at these outcomes, the benefits found with weight loss through diet and exercise may also be attributed to the weight loss attained with medications. All of these drugs have side effects, however, and long-term safety and efficacy data are lacking, so patients need to understand these cautions when considering their use. There is no evidence of mortality benefits from this level of modest weight loss. Recommendation 3: For obese patients who choose to use adjunctive drug therapy, options include sibutramine, orlistat, phentermine, diethylpropion, fluoxetine, and bupropion. The choice of agent will depend on the side effects profile of each drug and the patient's tolerance of those side effects. According to meta-analysis, the pooled amounts of weight lost with these drugs were 4.45 kg at 12 months for sibutramine, 2.89 kg at 12 months for orlistat, 3.6 kg at 6 months for phentermine, 3.0 kg at 6 months for diethylpropion, 3.15 kg at 12 months with fluoxetine, and 2.8 kg at 6 months with bupropion. There are no data to determine whether one drug is more efficacious than another, and there is no evidence for increased weight loss with combination therapy. There are no data about weight regain after medications are withdrawn, underscoring the need for sustained lifestyle and behavioral modifications. There are no long-term 12 months ; studies of efficacy or safety to inform the decision to continue treatment beyond 1 year; thus, the decision to continue should be a shared discussion between the physician and patient. Recommendation 4: Surgery should be considered as a treatment option for patients with a BMI of 40 kg greater who instituted but failed an adequate exercise and diet program with or without adjunctive drug therapy ; and Continued on page 4.
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