Analgesic Users Research Articles

Understanding management of poorly controlled pain in community-dwelling analgesic users: a qualitative study.

Background Chronic pain is a prevalent and debilitating condition for many people. Globally it is the greatest contributor to years lived with disability. Management often includes pharmacotherapy and pharmacists are therefore well placed to contribute to chronic pain management. Objective To explore chronic pain management in community-dwelling analgesic users with poorly controlled pain and investigate potential barriers to adequate pain management. Setting Regional Victoria, Australia. Method A descriptive qualitative approach was used. People who had been prescribed an analgesic for at least 6months and reported an average pain score over the last week of 4 or more out of 10 were interviewed about their pain management. Interviews followed a semi-structured interview guide. Thematic analysis of the data was undertaken followed by participant validation of the key themes. Main outcome measure Experience of chronic pain management. Results Three female and eight male people, aged between 34 and 77years were interviewed. The study demonstrated that there was a diverse range of issues relating to chronic pain management that fitted into seven major themes: impact of pain on life, invisibility of pain, issues associated with healthcare professionals, general medication issues, attitude towards taking analgesics, medication adherence, and attitude towards other treatment options. Chronic pain had dramatically altered the lives of all participants and their families as they came to accept and learn to live with the pain they experienced. The main barrier to adequate pain management was the invisibility of pain, which resulted in health professionals undertreating the pain reported by participants. Participants desire to take as few analgesics as possible, the reluctance of GPs to prescribe opioids and healthcare professionals focus on misuse also contributed to poor pain management. Conclusion Participants were able to accept high levels of pain while minimizing analgesic use. The two main barriers to adequate pain management were the invisibility of pain, which resulted in health professionals not treating the pain reported by the participant and the perception of participants that analgesics should not need to be taken regularly in adequate doses for the rest of their lives.

Patients use fewer analgesics following supervised exercise therapy and patient education: an observational study of 16 499 patients with knee or hip osteoarthritis

ObjectivesTo investigate changes in analgesic use before and after supervised exercise therapy and patient education in patients with knee or hip osteoarthritis (OA).MethodsWe recruited 16 499 of 25 933 eligible...

121. Effects of long-term opioid vs long-term NSAID use prior to lumbar spinal fusion

BACKGROUND CONTEXT Chronic low back pain continues to be the leading cause of pain and disability in the United States. There are diverse therapeutic interventions to ameliorate the pain, ranging from pharmaceuticals to surgery. Many patients have been using NSAIDs and opioid analgesics to initially manage their pain, but long-term use of both have been associated with many deleterious effects. PURPOSE The current study compares the associated costs and postoperative complications following lumbar spinal fusion between patients who are long-term current users of opioid analgesics and patients who are long-term current users of NSAIDs. STUDY DESIGN/SETTING Retrospective cohort analysis using the 2010-2016 National Readmission Database. PATIENT SAMPLE Using the 2010-2016 National Readmission Database, we conducted a retrospective cohort analysis of 31,670 patients who received a lumbar spinal fusion surgery and were either diagnosed as long-term current users of opioid analgesics (n=7,663) or long-term current users of NSAIDs (n=24,007). Comorbidities and demographics were controlled between the two groups. OUTCOME MEASURES Associated costs and postoperative complications. METHODS We then collected all of the individuals that had a nonelective readmission (Opioids, 13.5%, n=1,034; NSAIDs, 9.6%, n=2,302) and analyzed associated costs and postoperative complications including surgical site/wound infection, UTI, postoperative pain, osteomyelitis, thromboembolism, sepsis, pneumonia, pseudarthrosis, novel lumbar pathology, nervous system complications, need for revision surgery, and death. Statistical analysis was conducted in R. Tukey multiple comparisons of means and Welch two sample t-test were used to compare complications and costs by surgical approach. RESULTS Long-term current users of opioid analgesics had significantly higher total charges at their primary lumbar fusion surgery ($174,321.59±$149,861.10) compared to the long-term current NSAID users ($112,095.00±$83,212.89) (p CONCLUSIONS Long-term current users of opioid analgesics had significantly higher costs and longer lengths of stay at the primary lumbar fusion, and significantly more postoperative complications with higher costs at the nonelective readmissions compared to the long-term NSAID users. Long-term NSAID users had significantly higher rates of UTI and thromboembolic events, whereas long-term opioid analgesic users had significantly higher rates of infection and death following lumbar spinal fusion. FDA DEVICE/DRUG STATUS This abstract does not discuss or include any applicable devices or drugs.

Pain severity and analgesics use in the community-dwelling older population: a drug utilization study from Germany

PurposeChronic pain is common in the older population and a significant public health concern. However, comprehensive studies on analgesics use in this age group from Germany are scarce. This study aims to give a comprehensive overview on the use of the most common therapeutic groups of analgesics in community-dwelling older adults from Germany.MethodsA cross-sectional study was carried out using data from a German cohort of 2038 community-dwelling adults aged 63–89 years. Descriptive statistics and logistic regression models were applied to assess the utilization of analgesics by age, sex, pain severity, pain duration, and locations.ResultsOne out of four study participants was suffering from high-intensity or disabling pain. Approximately half of those taking analgesics still reported to suffer from high-intensity or disabling pain. Among analgesics users, occasional non-steroidal anti-inflammatory drugs (NSAIDs) use was the most frequent pain therapy (in 43.6% of users), followed by metamizole (dipyrone) use (16.1%), regular NSAIDs use (12.9%), strong opioids use (12.7%), and weak opioids use (12.0%). In multivariate logistic regression models, higher age, higher pain severity, longer pain duration, abdominal pain, and back pain were statistically significantly associated with opioids use. Metamizole use was also statistically significantly associated with higher pain severity but inversely associated with pain duration.ConclusionsA significant number of older German adults are affected by high-intensity and disabling chronic pain despite receiving analgesics. Long-term studies are needed to compare the effectiveness and safety of different treatments for chronic pain in older adults.

The Association Between Concurrence of Infection and the Onset of Severe Eruption or Liver Injury in Patients Using Antipyretic Analgesics: A Matched, Nested Case-Control Study.

Stevens-Johnson syndrome (SJS) and toxic epidermal necrosis (TEN) or drug-induced liver injury (DILI) are severe drug-induced reactions, known as idiosyncratic drug reactions. It is believed that immune response can lead to these severe adverse drug reactions. Our previous analysis of the Japanese Spontaneous Drug Reaction database suggested that the onset of SJS/TEN and DILI was strongly associated with infection. Hence, we conducted a matched, nested case-control study to elucidate the association between concurrent infection and the onset of SJS/TEN or liver injury in patients prescribed antipyretic analgesics. We extracted 4112055 patients who were prescribed antipyretic analgesics between January 2014 and December 2015. Amongst them, 553 (0.01%) were diagnosed with SJS/TEN and 12606 (0.3%) with liver injury. In a matched, nested case-control study, 131 and 2847 cases matched for SJS/TEN or liver injury, respectively. For each case, 3 controls were randomly matched with the case for age at index date and sex. In the conditional logistic regression analysis, there was a significant association between the combination of infection and antipyretic analgesics and the onset of SJS/TEN or liver injury (SJS/TEN: adjusted OR, 5.59; 95%CI, 2.01-15.51; liver injury: adjusted OR, 2.79; 95%CI, 2.24-3.46). Although it was not possible to distinguish whether the associations were caused by the infection or were a direct consequence of the antibiotic agents, our findings may help to increase awareness of the possibility of the increased onset of idiosyncratic drug reactions (SJS/TEN and liver injury) in antipyretic analgesic users because of infections.

Prevalence and Factors Associated with Analgesic Prescribing in Poly-Medicated Elderly Patients.

Pain is common in older patients and management guidelines rarely consider the effect of multiple comorbidities and concurrent medications on analgesic selection. The objectives of this study were to identify the prevalence and pattern of analgesic prescribing and associated factors in older patients with polypharmacy. Older patients (aged ≥ 75years) admitted to the Royal Adelaide Hospital between September 2015 and August 2016 and with polypharmacy were included and their comorbidities and medications prescribed at discharge were recorded. Drug Burden Index and Charlson Comorbidity Index were calculated. The number of medications that increased the risk of orthostatic hypotension were recorded. Logistic regression was used to compute the association between analgesic use and participant characteristics, and results were presented as odds ratios and 95% confidence intervals, adjusted for age, sex, Charlson Comorbidity Index, Drug Burden Index and orthostatic hypotension. Over 15,000 admissions were identified, of which 1192 patients were included, 824 (69%) of whom were prescribed an analgesic medication. Paracetamol (used by 89% of analgesic users), opioids (34%) and adjuvants (17%) were used more frequently than non-steroidal anti-inflammatory drugs (8%). Analgesic users had a higher Drug Burden Index, were prescribed more medications and were less likely to be male compared with non-users. Charlson Comorbidity Index across the cohort was high (7.3 ± 1.9) but there was no difference between analgesic users and non-users, but analgesic users were more likely to have a documented diagnosis of osteoarthritis, osteoporosis and falls. Opioid use was associated with the Drug Burden Index, while adjuvant use was associated with orthostatic hypotension. Opioid use was associated with having a diagnosis of osteoporosis and falls. In our cohort of poly-medicated elderly patients, prescription of analgesic medications was common, and these patients are likely to have an increased rate of adverse drug reactions and falls compared with those who were not prescribed analgesic medications.

Analgesic drug use in elderly persons: A population-based study in Southern Italy.

IntroductionAnalgesics such as non-steroidal anti-inflammatory drugs (NSAIDs), weak and strong opioids are commonly used among elderly persons. The aim of this study was to describe the demographic and clinical characteristics of elderly analgesic users and to measure the frequency of analgesic use, including the frequency of potentially inappropriate analgesic use.MethodsThe Arianna database was used to carry out this study. This database contains prescription data with associated indication of use for 1,076,486 inhabitants registered with their general practitioners (GPs) in the Caserta Local Health Unit (Caserta district, Campania region in Italy). A cohort of persons aged ≥65 years old with >1 year of database history having at least one analgesic drug (NSAIDs, strong or weak opioids) between 2010 and 2014 were identified. The date of the first analgesic prescription in the study period was considered the index date (ID).ResultsFrom a source population of 1,076,486 persons, 116,486 elderly persons were identified. Of these, 94,820 elderly persons received at least one analgesic drug: 36.6% were incident NSAID users (N = 36,629), while 13.2% were incident weak opioid users (N = 12,485) and 8.1% were incident strong opioid users (N = 7,658). In terms of inappropriate analgesic use, 9.2% (N = 10,763) of all elderly users were prescribed ketorolac/indomethacin inappropriately, since these drugs should not be prescribed to elderly persons. Furthermore, at least half all elderly persons with chronic kidney disease or congestive heart failure were prescribed NSAIDs, while these drugs should be avoided.ConclusionAnalgesics are commonly used inappropriately among elderly persons, suggesting that prescribing practice in the catchment area may yet be improved.

Problematic Medication With Benzodiazepines, "Z-drugs", and Opioid Analgesics.

An estimated 1.4 to 2.6 million people in German suffer from drug dependence. Most of them are long-term users of benzodiazepines (BZD), Z drugs (ZD), or opioid analgesics (OA). This analysis is based on prescription data from patients of the national statutory health insurance system in the German federal states of Schleswig-Holstein, Hamburg, Bremen, and Lower Saxony. Drug-taking trends, duration, dosage, and long-term use of BZD, ZD, and OA in the years 2006 to 2015 are analyzed; prevalences are estimated for the years 2006 to 2016. In 2006, 7.7% of patients received at least one prescription for a BZD, ZD, or OA; in 2016, 7.0% did. Over the period of analysis, a marked drop was seen in prescriptions of BZD and a slight fall in prescriptions of ZD (2006: BZD 3.5%, ZS 1.1%; 2016: BZD 2.0%, ZS 0.8%), but there was also an increase in prescriptions of OA, from 4.2% to 4.9%. The number of defined daily doses (DDD) prescribed per year fell for both BZD and ZD. For OA, the number of DDD prescribed per year rose from 2006 to 2009 and decreased by a small amount in subsequent years. The proportions of BZD and ZD patients who had long-term prescriptions fell over time, while the corresponding percentage of OA patients rose. Nearly one-fifth of all prescriptions for BZD were long-term prescriptions for an entire year, in violation of the relevant guidelines. The rising prevalence of OA use was in the expected range in view of the aging population, but the number of prescriptions rose among younger patients as well. This trend toward more common treatment with opioid analgesics should be critically examined.

Prescribing Associated with High-Risk Opioid Exposures Among Non-cancer Chronic Users of Opioid Analgesics: a Social Network Analysis.

The continued rise in fatalities from opioid analgesics despite a steady decline in the number of individual prescriptions directing ≥ 90 morphine milligram equivalents (MME)/day may be explained by patient exposures to redundant prescriptions from multiple prescribers. We evaluated prescribers' specialty and social network characteristics associated with high-risk opioid exposures resulting from single-prescriber high-daily dose prescriptions or multi-prescriber discoordination. Retrospective cohort study. A cohort of prescribers with opioid analgesic prescription claims for non-cancer chronic opioid users in an Illinois Medicaid managed care program in 2015-2016. Per prescriber rates of single-prescriber high-daily-dose prescriptions or multi-prescriber discoordination. For 2280 beneficiaries, 36,798 opioid prescription claims were submitted by 3532 prescribers. Compared to 3% of prescriptions (involving 6% of prescribers and 7% of beneficiaries) that directed ≥ 90 MME/day, discoordination accounted for a greater share of high-risk exposures-13% of prescriptions (involving 23% of prescribers and 24% of beneficiaries). The following specialties were at highest risk of discoordinated prescribing compared to internal medicine: dental (incident rate ratio (95% confidence interval) 5.9 (4.6, 7.5)), emergency medicine (4.7 (3.8, 5.8)), and surgical subspecialties (4.2 (3.0, 5.8)). Social network analysis identified 2 small interconnected prescriber communities of high-volume pain management specialists, and 3 sparsely connected groups of predominantly low-volume primary care or emergency medicine clinicians. Using multivariate models, we found that the sparsely connected sociometric positions were a risk factor for high-risk exposures. Low-volume prescribers in the social network's periphery were at greater risk of intended or discoordinated prescribing than interconnected high-volume prescribers. Interventions addressing discoordination among low-volume opioid prescribers in non-integrated practices should be a priority. Demands for enhanced functionality and integration of Prescription Drug Monitoring Programs or referrals to specialized multidisciplinary pain management centers are potential policy implications.

Use of Opioids and Other Analgesics Before and After Primary Surgery for Adult Spinal Deformity: A 10-Year Nationwide Study.

ObjectiveTo report the 1-year pre and postoperative analgesic use in patients undergoing primary surgery for adult spinal deformity (ASD) and assess risk factors for chronic postoperative opioid use. MethodsPatients > 18 years undergoing primary instrumented surgery for ASD in Denmark between 2006 and 2016 were identified in the Danish National Patient Registry. Information on analgesic use were obtained from the Danish National Health Service Prescription Database. Use of analgesics was calculated one year before and after surgery for each patient, per quarter (-Q4 to -Q1 before and Q1 to Q4 after). Users were defined as patient with one or more prescriptions in the given quarter. ResultsWe identified 892 patients. Preoperatively, 28% (n = 246) of patients were opioid users in -Q4 and 33% (n = 295) in -Q1. Postoperatively, 85% (n = 756) of patients were opioid users in Q1 and 31% (n = 280) in Q4. Proportions of users of other analgesics (paracetamol, antidepressants, and anticonvulsants) were stable before and after surgery. Use of nonsteroidal anti-inflammatory drug decreased postoperatively by 40% (-Q1 vs. Q4). 26% of patients had chronic preoperative opioid use (one or more prescriptions in each -Q2 and -Q1) and 24% had chronic postoperative use (prescription each of Q1–Q4). Multivariate logistic regression analysis showed age increment per 10 years and preoperative chronic opioid use as risk factors for chronic postoperative opioid use. ConclusionOne year after ASD surgery, opioid use was not reduced compared to preoperative usage.

Fluoroscopic Characterization of Colonic Dysmotility Associated to Opioid and Cannabinoid Agonists in Conscious Rats.

Background/AimsGastrointestinal adverse effects have a major impact on health and quality of life in analgesics users. Non-invasive methods to study gastrointestinal motility are of high interest. Fluoroscopy has been previously used to study gastrointestinal motility in small experimental animals, but they were generally anesthetized and anesthesia itself may alter motility. In this study, our aim is to determine, in conscious rats, the effect of increasing doses of 2 opioid (morphine and loperamide) and 1 cannabinoid (WIN 55,212-2) agonists on colonic motility using fluoroscopic recordings and spatio-temporal maps.MethodsMale Wistar rats received barium sulfate intragastrically, 20–22 hours before fluoroscopy, so that stained fecal pellets could be seen at the time of recording. Animals received an intraperitoneal administration of morphine, loperamide, or WIN 55,212-2 (at 0.1, 1, 5, or 10 mg/kg) or their corresponding vehicles (saline, Cremophor, and Tocrisolve, respectively), 30 minutes before fluoroscopy. Rats were conscious and placed within movement-restrainers for the length of fluoroscopic recordings (120 seconds). Spatio-temporal maps were built, and different parameters were analyzed from the fluoroscopic recordings in a blinded fashion to evaluate colonic propulsion of endogenous fecal pellets.ResultsThe analgesic drugs inhibited propulsion of endogenous fecal pellets in a dose-dependent manner.ConclusionsFluoroscopy allows studying colonic propulsion of endogenous fecal pellets in conscious rats. Our method may be applied to the noninvasive study of the effect of different drug treatments and pathologies.

An international study of analgesic dependence among people with pain in the general population

Background: Overuse of and dependence on analgesics (including opioids and other pain medications) are major international public health problems. Objective: To identify influences on analgesic dependence among analgesic users in the general populations of different countries. Methods: Online surveys of 1,283 people with pain in the UK, USA, Australia, Germany, Egypt and China/Macau/Hong Kong. Results: Levels of analgesic overuse and dependence were highest in Egypt and lowest in China/Macau/Hong Kong. In every country except Egypt, frequency of pain and frequency of analgesic use were correlated with analgesic dependence, and scores on the Need subscale of the Pain Medication Attitudes Questionnaire (PMAQ) independently predicted analgesic dependence. In the UK, USA, Australia, and Germany, frequency of analgesic use mediated the effects of pain frequency or intensity, and Need scores mediated the effects of frequency of analgesic use. In Egypt, more recent pain, analgesic overuse, and the Emotion and Solicitude subscales of the Survey of Pain Attitudes independently predicted analgesic dependence. Conclusions: Across multiple countries, the impact of pain on analgesic dependence was mediated by frequency of analgesic use rather than overuse or abuse, and self-reported need for analgesics was the strongest independent predictor of dependence. Asking people directly about their feelings of needing analgesics could therefore identify those who could be helped to use analgesics less frequently, which should reduce their risk of dependence.

P157: Pain management post-emergency department discharge: how are analgesics being consumed by patients with ongoing pain?

Introduction: Pain management is a cornerstone of emergency department (ED) practice, yet ongoing pain after ED discharge and return visits for inadequate analgesia are common. Over-the-counter (OTC) acetaminophen and nonsteroidal anti-inflammatory drugs are widely accepted first line agents for mild to moderate pain. Previous research has not investigated how patients actually consume such agents after discharge, and if they consume them synergistically and at sufficient doses for optimal analgesia. We sought to determine the proportion of patients in ongoing pain post-discharge that were utilizing analgesics as well as the type and dose of agent(s) used. Methods: Adults presenting to our ED with an acutely painful musculoskeletal complaint during research assistant hours were eligible for enrollment. After excluding non-English speakers as well as admitted, pregnant/breastfeeding, and chronic pain patients, consenting subjects completed in-person questionnaires during their ED stay and a follow-up telephone interview 2-3 days later. Results: 158 individuals were approached during the study period, of which 99 enrolled. 78 completed follow-up. At follow-up, 71 (91%) individuals experienced ongoing pain with a median score of 5 (interquartile range (IQR) 3-6) on an 11-point scale. 48 (67%) of patients still in pain consumed analgesics in the preceding 24 hours. The most commonly used agents were acetaminophen by 18 individuals (38% of analgesic users), ibuprofen by 16 (33%), and naproxen by 9 (19%). 29 respondents (60% of analgesic users) were using solely oral OTC analgesics. Only 15 (31% of analgesic users) used multiple agents concurrently, and 11 (23%) used prescription opioids. Acetaminophen was used at a median daily dose of 1500mg (IQR 1000-2000mg), much lower than that recommended for maximal analgesia (4000mg). Ibuprofen daily doses (1200mg, IQR 800-1300mg) were slightly lower than typical recommended doses (1600mg, 400mg every 6 hours). Conclusion: Only two-thirds of patients with ongoing pain at 2-3 days post-ED discharge were consuming analgesics, most commonly acetaminophen and ibuprofen. Of patients using analgesics, less than one-third used multiple agents. OTC medications are not used by most patients at doses for maximal analgesia. It may be possible to reduce pain burden and repeat-visits in discharged ED patients by optimizing the use of OTC analgesics.

Pain Treatments After Hip Fracture Among Older Nursing Home Residents

ObjectivesTo examine the association between use of opioids versus other analgesics with death and functioning after hip fracture in older nursing home (NH) residents. DesignRetrospective cohort using national Medicare fee-for-service claims linked to the Minimum Data Set. SettingUS NHs. ParticipantsNH residents aged ≥65 years who became a long-stay resident (>100 days in the NH) between January 2008 and December 2009, had a hospitalized hip fracture, and returned to the NH. ExposureNew use of opioid versus nonopioid analgesics (acetaminophen or nonsteroidal anti-inflammatory drugs) within 14 days post hip fracture. MeasurementsFollow-up began on the index date and continued until the first occurrence of death, significant functional decline (3-point increase on MDS Activities of Daily Living scale), or 120 days of follow-up. Odds ratios (ORs) with 95% confidence intervals (CIs) for outcomes were estimated using inverse probability of treatment–weighted multinomial logistic regression models. ResultsAmong the 2755 NH residents with a hip fracture included in our study, 1155 (41.9%) were opioid users, and 1600 (58.1%) were nonopioid analgesic users. The mean age was 86.3 years, 73.8% were female, and 86.0% were white. Opioid use was associated with a significantly lower likelihood of death (OR = 0.47, 95% CI 0.39-0.56) and a nonsignificant decrease in functional decline (OR = 0.77, 95% CI 0.58-1.03). ConclusionA rigorous study that addresses the limitations of this study is critical to validate our preliminary findings and provide evidence about the effect of using opioid versus nonopioid analgesics to optimize acute pain in NH residents with a hip fracture.

Use of non-prescription analgesics and male reproductive function

We studied the association between intake of non-prescription analgesics and semen quality and male reproductive hormone levels in a cross-sectional study among 1493 men. The men provided one semen (n=1493) and blood sample (n=1056) and filled in questionnaires on use of non-prescription analgesics (paracetamol, NSAIDs and combination drugs (yes/no)). Adjusting for age, study and other covariates, we observed no association between intake of non-prescription analgesics and markers of semen quality. Adjusting for age and time of day of blood sampling, users of non-prescription analgesics had a 10.4% (95% confidence interval (CI) 4.0–17.1%) higher testosterone level than non-users. When we stratified by medication type, the association between analgesics and higher testosterone was observed between users of non-steroidal anti-inflammatory drugs (NSAIDs) and combination drugs but not paracetamol. This study suggests that use of non-prescription analgesics is associated with slightly higher serum testosterone levels than non-use.

Pain sensitivity and analgesic use among 10,486 adults: the Troms\xf8 study

BackgroundIncreased pain sensitivity is a putative risk factor for chronic pain and consequently for analgesic use. Conversely, analgesic use may be a cause of increased pain sensitivity, e.g., through opioid-induced hyperalgesia. We aimed to study the association between pain sensitivity and analgesic use in a general population, and to test the hypothesis that increased baseline pain sensitivity is a risk factor for future persistent analgesic use.MethodsThe Tromsø Study (2007–08), a population-based health study, was linked with eight years of prescription data from the Norwegian Prescription Database. The cold pressor test was completed in 10,486 participants aged 30+ years, and we used cold pressor endurance time as a proxy measure of pain sensitivity. Cross-sectional associations with different measures of analgesic use were assessed. Furthermore, a cohort of 9,657 persons was followed for 4.5 years.ResultsIn the cross-sectional analysis, increased pain sensitivity was associated with analgesic use; regular users of opioids alone were more pain sensitive than regular users of non-opioid analgesics. Increased baseline pain sensitivity was a risk factor for persistent analgesic use, i.e., using non-steroidal anti-inflammatory drugs, paracetamol, or opioids for ≥ 90 days and proportion-of-days-covered ≥ 40% (HR = 1.22, 95% CI 1.06-1.40), although not statistical significant after confounder adjustment.ConclusionsIncreased pain sensitivity was associated with analgesic use in general, and reduced pain tolerance was found for both opioid and non-opioid analgesic users. The data suggest that hyperalgesia is an effect of analgesics, whereas pain tolerance has little impact on future analgesic use.

Differences in analgesic use in community-dwelling persons with and without Alzheimer's disease.

There are conflicting findings about analgesic use among persons with cognitive impairment compared to cognitively intact older persons. The objective of our study was to investigate the prevalence of analgesic use in community-dwelling persons with and without Alzheimer's disease (AD), within six months after AD diagnosis and to find out factors associated with the use of analgesics and specific analgesic groups. We utilized data from register based MEDALZ (Medication use and Alzheimer's disease) cohort consisting of all community-dwelling persons diagnosed with AD during 2005-2011 in Finland and their matched comparison persons without AD. Altogether, 67,215 persons with AD and one comparison person for each case were included. Drug use data were collected from the Prescription Register and comorbidities from Special Reimbursement and Hospital Discharge Registers. Statistically significant (p<0.001) yet mostly small differences were found for analgesics use: analgesics were used by 34.9% and 33.5% of persons with and without AD, respectively. Paracetamol was the most frequently used analgesic both among persons with (25.0%) and without AD (19.1%). Persons with AD used less frequently NSAIDs (Nonsteroidal Anti-inflammatory Drugs) (13.2% vs. 17.3%) and mild opioids (5.0% vs. 7.1%), while the use of strong opioids was more common in comparison to persons without AD (1.3% vs. 1.1%, respectively). Analgesic users were more likely women, aged ≥80years, had asthma/COPD, cardiovascular disease, diabetes, cancer, hip fracture, osteoporosis, rheumatoid arthritis, and lower socioeconomic position. Further studies are needed to evaluate the adequateness of pain relief in older persons with and without AD. Persons with Alzheimer's disease (AD) used more frequently paracetamol and less frequently NSAIDs and mild opioids. A decreasing trend of NSAID use was observed among persons with AD during the study period.

Key opioid prescription concerns in cancer patients: A nationwide study

BackgroundOpioids are crucial in cancer pain management. We examined the nationwide prescription patterns of opioids in Taiwan cancer patients to find the potential concerns. MethodsWe reviewed the claims database of the National Health Insurance of Taiwan for patients diagnosed with cancer from 2003 to 2011. The use and cost of analgesics were analyzed. Opioids were classified into recommended strong opioids (morphine and transdermal fentanyl), recommended weak opioids (tramadol, buprenorphine, and codeine), and unrecommended opioids (propoxyphene, nalbuphine, and meperidine). ResultsWe enrolled 1,424,048 patients with cancer, and ∼50% of them took analgesics. Among analgesic users, patients who used opioids increased from 48.2% in 2003 to 52.0% in 2010. Approximately 92% of the opioid use came from recommended opioids, either strong (51%) or weak opioids (41%). The ratio of the use of short-acting strong opioids to that of long-acting opioids increased from 0.41 in 2003 to 0.63 in 2011. Transdermal fentanyl accounted for > 50% of the use of strong opioids. Among weak opioids, the use of tramadol gradually increased to 71% in 2011. On average, opioids contributed to 0.79‰ of all medical expenditures and 2.94‰ of all medication costs. ConclusionThe use of short-acting strong opioids increased during the study period. Instead of oral opioids, transdermal fentanyl was the most commonly used opioid among Taiwan cancer patients. The use of weak opioids, particularly tramadol, was high. These concerns should be the focus of pain management education.

The Association Between Talc Use and Ovarian Cancer: A Retrospective Case-Control Study in Two US States.

Multiple studies of ovarian cancer and genital talc use have led only to consensus about possible carcinogenicity. Seeking greater clarity, we examined this association in 2,041 cases with epithelial ovarian cancer and 2,100 age- and-residence-matched controls. We defined genital talc use as regular application to the genital/rectal area directly, on sanitary napkins, tampons, or underwear. To estimate "talc-years," we multiplied applications per year by years used. Unconditional logistic regression, Wald statistics, likelihood-ratio tests, and polytomous logistic regression were used to calculate adjusted odds ratios (OR) and 95% confidence intervals (CI), trends, effect-modification, and heterogeneity by ovarian cancer histologic subtype. Overall, genital talc use was associated with an OR (95% CI) of 1.33 (1.16, 1.52), with a trend for increasing risk by talc-years. Women who used talc were more likely to be older, heavier, asthma sufferers, and regular analgesic users--none of which was a confounder. Dose-responses were more apparent for premenopausal women, especially nonsmokers and those heavier or postmenopausal users of menopausal hormones (hormone therapy [HT]). Subtypes of ovarian cancer more likely to be associated with talc included invasive serous and endometrioid tumors and borderline serous and mucinous tumors. Premenopausal women and postmenopausal HT users with these subtypes who had accumulated >24 talc-years had ORs (95% CI) of 2.33 (1.32, 4.12) and 2.57 (1.51, 4.36), respectively. Risks for epithelial ovarian cancer from genital talc use vary by histologic subtype, menopausal status at diagnosis, HT use, weight, and smoking. These observations suggest that estrogen and/or prolactin may play a role via macrophage activity and inflammatory response to talc.

Severe Headache or Migraine History is Inversely Correlated With Dietary Sodium Intake: NHANES 1999-2004.

ObjectiveWe investigated whether dietary sodium intake from respondents of a national cross‐sectional nutritional study differed by history of migraine or severe headaches.BackgroundSeveral lines of evidence support a disruption of sodium homeostasis in migraine.DesignOur analysis population was 8819 adults in the 1999–2004 National Health and Nutrition Examination Survey (NHANES) with reliable data on diet and headache history. We classified respondents who reported a history of migraine or severe headaches as having probable history of migraine. To reduce the diagnostic conflict from medication overuse headache, we excluded respondents who reported taking analgesic medications. Dietary sodium intake was measured using validated estimates of self‐reported total grams of daily sodium consumption and was analyzed as the residual value from the linear regression of total grams of sodium on total calories. Multivariable logistic regression that accounted for the stratified, multistage probability cluster sampling design of NHANES was used to analyze the relationship between migraine and dietary sodium.ResultsOdds of probable migraine history decreased with increasing dietary sodium intake (odds ratio = 0.93, 95% confidence interval = 0.87, 1.00, P = .0455). This relationship was maintained after adjusting for age, sex, and body mass index (BMI) with slightly reduced significance (P = .0505). In women, this inverse relationship was limited to those with lower BMI (P = .007), while in men the relationship did not differ by BMI. We likely excluded some migraineurs by omitting frequent analgesic users; however, a sensitivity analysis suggested little effect from this exclusion.ConclusionsThis study is the first evidence of an inverse relationship between migraine and dietary sodium intake. These results are consistent with altered sodium homeostasis in migraine and our hypothesis that dietary sodium may affect brain extracellular fluid sodium concentrations and neuronal excitability.