Misinformation messages shared via WhatsApp in Mexico during the COVID-19 pandemic: an exploratory study.

Little is known about the role of WhatsApp in spreading misinformation during the start of the COVID-19 pandemic in Mexico. The aim of this study is to analyze the message content, format, authorship, time trends and social media distribution channels of misinformation in WhatsApp messages in Mexico. From March 18 to June 30, 2020 the authors collected all WhatsApp messages received via their personal contacts and their social networks that contained information about COVID-19. Descriptive and inferential statistics were used to analyze the scientifically inaccurate messages and the relationship between variables, respectively. Google image and video searches were carried out to identify sharing on other social media. Out of a total of 106 messages, the most frequently mentioned COVID-19 related message topics were prevention (20.0%), conspiracy (18.5%), therapy (15.4%) and origin of the virus (10.3%), changing throughout the pandemic according to users' concerns. Half of all WhatsApp messages were either images or videos. WhatsApp images were also shared on Facebook (80%) and YouTube (~50%). Our findings indicate that the design of information and health promotion campaigns requires to be proactive in adapting to the changes in message content and format of misinformation shared through encrypted social media.

As an encrypted social media platform with hardly accessible content, little is known about the role of WhatsApp in spreading misinformation messages (either false or misleading information) during the COVID-19 pandemic in Mexico. In this study, researchers studied the content, format, time and channel of distribution of WhatsApp messages containing information about COVID-19 collected via their personal contacts and their social networks from March 18 to June 30, 2020. Half of all messages were visually-appealing and the content changed according to the population´s concerns. WhatsApp messages were also distributed in several other social media platforms. Understanding the format and content of misinformation may help to design dynamic health information and promotion campaigns against it. Regulations of public social media such as Youtube can have a positive impact on WhatsApp.

Data sources for drug utilization research in Latin American countries-A cross-national study: DASDUR-LATAM study.

PURPOSE: Drug utilization research (DUR) contributes to inform policymaking and to strengthen health systems. The availability of data sources is the first step for conducting DUR. However, documents that systematize these data sources in Latin American (LatAm) countries are not known. We compiled the potential data sources for DUR in the LatAm region. METHODS: A network of DUR experts from nine LatAm countries was assembled and experts conducted: (i) a website search of the government, academic, and private health institutions; (ii) screening of eligible data sources, and (iii) liaising with national experts in pharmacoepidemiology (via an online survey). The data sources were characterized by accessibility, geographic granularity, setting, sector of the data, sources and type of the data. Descriptive analyses were performed. RESULTS: We identified 125 data sources for DUR in nine LatAm countries. Thirty-eight (30%) of them were publicly and conveniently available; 89 (71%) were accessible with limitations, and 18 (14%) were not accessible or lacked clear rules for data access. From the 125 data sources, 76 (61%) were from the public sector only; 46 (37%) were from pharmacy records; 43 (34%) came from ambulatory settings and; 85 (68%) gave access to individual patient-level data. CONCLUSIONS: Although multiple sources for DUR are available in LatAm countries, the accessibility is a major challenge. The procedures for accessing DUR data should be transparent, feasible, affordable, and protocol-driven. This inventory could permit a comparison of drug utilization between countries identifying potential medication-related problems that need further exploration.

Availability, prices, and affordability of selected essential cancer medicines in a middle-income country - the case of Mexico.

BACKGROUND: More alternatives have become available for the diagnosis and treatment of cancer in low- and middle-income countries. Because of increasing demands, governments are now facing a problem of limited affordability and availability of essential cancer medicines. Yet, precise information about the access to these medicines is limited, and the methodology is not very well developed. We assessed the availability and affordability of essential cancer medicines in Mexico, and compared their prices against those in other countries of the region. METHODS: We surveyed 21 public hospitals and 19 private pharmacies in 8 states of Mexico. Data were collected on the availability and prices of 49 essential cancer medicines. Prices were compared against those in Chile, Peru, Brazil, Colombia and PAHO's Strategic Fund. RESULTS: Of the various medicines, mean availability in public and private sector outlets was 61.2 and 67.5%, respectively. In the public sector, medicines covered by the public health insurance "People's Health Insurance" were more available. Only seven (public sector) and five (private sector) out of the 49 medicines were considered affordable. Public sector procurement prices were 41% lower than in other countries of the region. CONCLUSIONS: The availability of essential cancer medicines, in the public and private sector, falls below World Health Organization's 80% target. The affordability remains suboptimal as well. A national health insurance scheme could serve as a mechanism to improve access to cancer medicines in the public sector. Comprehensive pricing policies are warranted to improve the affordability of cancer medicines in the private sector.

Strategies to improve the medical device life cycle in Mexico.

OBJECTIVE: To analyze the role of stakeholders to three alternative strategies to improve processes and practices regarding the regulation, assessment, and management of orthopaedic medical devices in Mexico. MATERIALS AND METHODS: The study was based on document analysis and 17 structured interviews with multiple key actors within the Mexican health system to inform a stakeholder analysis aiming at assessing the political feasibility of these strategies. RESULTS: Central level government agencies, those with a relation to quality of care, were identified as most relevant stakeholders to influence the adaption and application of the strategies. Major barriers identified are financial and human resources, and organisational culture towards reform. CONCLUSIONS: Discussed strategies are political feasible. However, solving identified barriers is crucial to achieve changes directed to improve outputs and outcomes of medical device life cycle and positively influence the quality of health care and the health system's performance.

[Clinics adjacent to private pharmacies in Mexico: infrastructure and characteristics of the physicians and their remuneration]. / Consultorios adyacentes a farmacias privadas en México: infraestructura y características del personal médico y su remuneración.

OBJECTIVE: To analyze and compare the physicians' characteristics, their remuneration, the compliance with regulation and the services offered between clinics adjacent to pharmacies (CAF) and independent medical clinics (CMI). MATERIALS AND METHODS: Questionnaire applied to 239 physicians in 18 states including the Federal District, in Mexico in 2012. RESULTS: Physicians in CAF had less professional experience (5 versus 12 years), less postgraduate studies (61.2 versus 81.8%) and lower average monthly salaries (USD 418 versus USD 672) than their peers in CMI. In CAF there was less compliance in relation to medical record keeping and prescribing. CONCLUSIONS: The employment situation of physicians in CAF is more precarious than in CMI. It is necessary to strengthen the enforcement of existing regulations and develop policies according to the monitoring of its performance, particularly, but not exclusively, in CAF.

[Challenges and opportunities for the development of a national pharmaceutical policy in México]. / Retos y oportunidades para el desarrollo de la política farmacéutica nacional en México.

Unlike many other Latin American countries Mexico has no coherent and explicit national pharmaceutical policy (NPP). Other national challenges are: high out-of-pocket expenditure on medicines despite the implementation of universal health care coverage through Seguro Popular, high prices of medicines in the private sector in comparison to other countries when adjusted for income level, and the lack of clear strategies to improve safety and efficiency in the use of medicines, in particular interventions aimed at private physicians, pharmacies and consumers. The aim of this paper is to describe the challenges and opportunities to (1) consolidate the processes of formulating, implementing and evaluating NPP, and (2) define the policy content with regard to access and use of medicines.

[Factor associated with medicines utilization and expenditure in Mexico]. / Factores asociados con la utilización y el gasto en medicamentos en México.

OBJECTIVE: To analyze medicine utilization and expenditure and associated factors in Mexico, as well as to discuss their implications for pharmaceutical policy. MATERIALS AND METHODS: Analysis of a sample of 193,228 individuals from the Mexican National Health and Nutrition Survey 2012. Probability and amount of expenditure were estimated using logit, probit and quantile regression models, evaluating three dimensions of access to medicines: (1) likelihood of utilization of medicines in the event of a health problem, (2) probability of incurring expenses and (3) amount spent on medicines. RESULTS: Individuals affiliated to IMSS were more likely to use medicines (OR=1.2, p<0.05). Being affiliated to the IMSS, ISSSTE or SP reduced the likelihood of spending compared to those without health insurance (about RM 0.7, p<0.01). Median expenditures varied between 195.3 and 274.2 pesos. CONCLUSIONS: Factors associated with the use and expenditure on medicines indicate that inequities in the access to medicines persist.

Regulation of antibiotic sales in Mexico: an analysis of printed media coverage and stakeholder participation.

BACKGROUND: Restricting antibiotics sales to those with medical prescriptions only is a central strategy for promoting appropriate use and containing antibiotic resistance; however, many low and middle income countries have not enforced policies that prevent widespread self-medication with antibiotics. In 2010, the Mexican government announced the enforcement of antibiotic sales regulations, a policy that gained media prominence. This study analyzes media coverage of issues, stakeholder representation, and positions taken during policy agenda setting, drafting, and implementation to shed light on policy making to promote appropriate antibiotic utilization. METHODS: We carried out a quantitative content analysis of 322 newspaper articles published between January 2009 and December 2010 in 18 national and regional newspapers. Additionally, we conducted a qualitative content analysis to understand the positions adopted and strategies developed by nine key stakeholders. Framing theory guided the analysis. RESULTS: The Ministry of Health dominated media coverage, justifying the enforcement policy by focusing on risks of self-medication, and to a lesser degree dangers of increasing antibiotic resistance. Pharmacy associations appeared to be the leading opponents, arguing that the policy created logistical difficulties and corruption, and had negative economic impact for pharmacies and their clients. The associations developed strategies against the regulation such as attempting to delay implementation and installing physicians' consultation offices within pharmacies. While medical associations and academic institutions called for a comprehensive strategy to combat antibiotic resistance, improve prescription quality, and create public awareness, these issues had little impact on media coverage. Consumer groups and legislators received very little media coverage. CONCLUSIONS: The narrowly-focused and polarized media coverage ─centred on problems of self- medication and economic impact ─ was a missed opportunity to publicly discuss and to develop a comprehensive national strategy on antibiotic use in Mexico. It highlights the need for discussing and developing interventions within the framework of a pharmaceutical policy.

Challenges of Guaranteeing Access to Medicines in Mexico: Lessons from Recent Changes in Pharmaceuticals Procurement.

During the last two decades, Mexico adopted policies intended to increase the efficiency and effectiveness of medicines procurement in its nationally fragmented health system. In this policy report, we review Mexico's efforts to guarantee access to medicines during three national administrations (from 2000 to 2018), and then examine major health system changes introduced by the current government (2018-2024), which have created significant setbacks in guaranteeing access to medicines in Mexico. These recent changes are having important consequences in the levels of satisfaction of health care users and citizens, household expenditure on health, and health conditions. We suggest key lessons for Mexico and other countries seeking to improve pharmaceutical procurement as part of guaranteeing access to medicines.

Trends in antibiotic utilization in eight Latin American countries, 1997-2007.

OBJECTIVE: To describe the trends in antibiotic utilization in eight Latin American countries between 1997-2007 METHODS: We analyzed retail sales data of oral and injectable antibiotics (World Health Organization (WHO) Anatomic Therapeutic Chemical (ATC) code J01) between 1997 and 2007 for Argentina, Brazil, Chile, Colombia, Mexico, Peru, Uruguay, and Venezuela. Antibiotics were aggregated and utilization was calculated for all antibiotics (J01); for macrolides, lincosamindes, and streptogramins (J01 F); and for quinolones (J01 M). The kilogram sales of each antibiotic were converted into defined daily dose per 1 000 inhabitants per day (DID) according to the WHO ATC classification system. We calculated the absolute change in DID and relative change expressed in percent of DID variation, using 1997 as a reference RESULTS: Total antibiotic utilization has increased in Peru, Venezuela, Uruguay, and Brazil, with the largest relative increases observed in Peru (5.58 DID, +70.6%) and Venezuela (4.81 DID, +43.0%). For Mexico (-2.43 DID; -15.5%) and Colombia (-4.10; -33.7%), utilization decreased. Argentina and Chile showed major reductions in antibiotic utilization during the middle of this period. In all countries, quinolone use increased, particularly sharply in Venezuela (1.86 DID, +282%). The increase in macrolide, lincosaminde, and streptogramin use was greatest in Peru (0.76 DID, +82.1%), followed by Brazil, Argentina, and Chile CONCLUSIONS: Analyzing antibiotic utilization in Latin America presents a series of challenges. Creating policy-relevant evidence based on antimicrobial consumption patterns is needed in order to foster policies aimed at improving appropriate use of antibiotics in the region.

Access to cancer medication in public hospitals in a middle-income country: The view of stakeholder.

BACKGROUND: Access to cancer medicines is a core component of comprehensive cancer care; as such, it is included in Mexico's public health insurance: Seguro Popular de Salud (SPS). Learning about stakeholders' experiences on processes and barriers influencing access to essential cancer medicines within healthcare facilities allows identifying needed policies to improve access to cancer care. OBJECTIVE: The aim of this study was to obtain the insights of health professionals in public hospitals in Mexico on how SPS influences access to cancer medicines regarding medicine selection, financing, and procurement and supply systems. The purpose is to identify policy areas that need strengthening to improve access to cancer medicines. METHODS: Semi-structured interviews were conducted with 67 health professionals from 21 public hospitals accredited by SPS across Mexico. A framework analysis was used with categories of analysis derived from the World Health Organization's Access framework. RESULTS: Most stakeholders reported that the availability of listed cancer medicines was sufficient. However, cancer specialists reported that medicines coverage by SPS was restrictive covering only basic cancer care. Public hospitals followed SPS treatment protocols in selecting and prescribing cancer medicines but used different procurement procedures. When essential cancer medicines were unavailable (not listed or stocked-out), hospitals reported several strategies such as prescribing alternative therapies, resorting to direct purchases, and assisting patients in obtaining medicines elsewhere. Other reported barriers to access to treatment were: distance to health facilities, poor insurance coverage, and financial restrictions. CONCLUSIONS: Health professionals have encountered benefits and challenges from the implementation of SPS influencing access to cancer medicines and care in Mexico, pointing to areas in which action is necessary. Finding the right balance between expanding the range and cost of cancer treatments covered by insurance and making basic cancer care available to all is a challenge faced by Mexico and other middle-income countries.

Pharmacy customers' knowledge of side effects of purchased medicines in Mexico.

OBJECTIVES: To analyse pharmacy customers' knowledge and information sources about side effects of medicines they purchased and factors associated with this knowledge. METHODS: Cross-sectional survey and semi-structured interviews with customers of 52 randomly selected community pharmacies in Morelos state, Mexico. Customers were included if they were older than 18 years, bought at least one drug either with or without medical prescription, and agreed to take part in the survey. Data were analysed using a multinomial logistic regression model. RESULTS: A total of 1445 customers buying 1946 drugs were surveyed (age 42.9 +/- 15.7 years, 56.9% female); 627 (59%) of 1055 customers who purchased prescription-only medicines (POM) did so without a prescription. Of all customers interviewed, 172 (11.9%) affirmed that the bought medicine(s) could cause harm. Only half of those (87 or 6%) were able to identify correctly at least one side effect of the purchased medicines. The majority received the information about side effects from a physician. Customers in semirural areas knew less about side effects (odds ratio: 0.26; 95% CI: 0.11-0.61; P = 0.00); whereas customers buying medicines for chronic pain, hypertension or diabetes knew more (odds ratio 2.63; 95% CI: 1.44-4.80; P = 0.00). CONCLUSION: The overall majority of customers did not know that medicines they bought could be harmful. This is particularly alarming because they frequently used POM without consulting a physician.

[Antibiotic use in Mexico: review of problems and policies]. / Uso de antibióticos en México: revisión de problemas y políticas.

The inappropriate use of antibiotics signifies a risk for individual health and a waste of health resources. It triggers the development of antibiotic resistance, which increases expenditures and mortality related to infectious disease, and is hence considered a serious public health problem. The World Health Organization has thus recommended a series of strategies to be included within national pharmaceutical policies. In Mexico, diverse factors related to the inappropriate use of antibiotics have been documented. While the response has been mainly in the form of educational and managerial interventions directed toward physicians in public health services, as well as epidemiological surveillance, there is a paucity of research and interventions focused on consumers, pharmacies, and the private sector. Fundamentally, a comprehensive national strategy for antibiotics is not incorporated into health and pharmaceutical policies.

Medicines in Mexico, 1990-2004: systematic review of research on access and use.

OBJECTIVE: To review original research studies published between 1990 and 2004 on the access and use of medicines in Mexico to assess the knowledge base for reforming Mexico's pharmaceutical policy. MATERIAL AND METHODS: A literature review using electronic databases was conducted of original studies published in the last 15 years about access and use of medicines in Mexico. In addition, a manual search of six relevant journals was performed. Excluded were publications on herbal, complementary and alternative medicines. RESULTS: Were identified 108 original articles as being relevant, out of 2289 titles reviewed, highlighting four policy-related problems: irrational prescribing, harmful self-medication, inequitable access, and frequent drug stock shortage in public health centers. CONCLUSIONS: This review identified two priorities for Mexico's pharmaceutical policy and strategies: tackling the irrational use of medicines and the inadequate access of medicines. These are critical priorities for a new national pharmaceutical policy.

[Working conditions in outpatient clinics adjacent to private pharmacies in Mexico City: perspective of physicians]. / Condiciones de trabajo en consultorios adyacentes a farmacias privadas en Ciudad de México: perspectiva del personal médico.

OBJECTIVE: To analyse the working conditions of physicians in outpatient clinics adjacent to pharmacies (CAFs) and their organizational elements from their own perspective. METHODS: We carried out an exploratory qualitative study. Semi-structured interviews were conducted with 32 CAF physicians in Mexico City. A directed content analysis technique was used based on previously built and emerging codes which were related to the experience of the subjects in their work. RESULTS: Respondents perceive that work in CAFs does not meet professional expectations due to low pay, informality in the recruitment process and the absence of minimum labour guarantees. This prevents them from enjoying the benefits associated with formal employment, and sustains their desire to work in CAF only temporarily. They believe that economic incentives related to number of consultations, procedures and sales attained by the pharmacy allow them to increase their income without influencing their prescriptive behaviour. They express that the monitoring systems and pressure exerted on CAFs seek to affect their autonomy, pushing them to enhance the sales of medicines in the pharmacy. CONCLUSIONS: Physicians working in CAFs face a difficult employment situation. The managerial elements used to induce prescription and enhance pharmacy sales create a work environment that generates challenges for regulation and underlines the need to monitor the services provided at these clinics and the possible risk for users.

A collaborative initiative for the containment of antimicrobial resistance in Mexico.

Antimicrobial resistance exacts worldwide an increasingly significant clinical and economic toll. Despite the international calls for urgent action, antimicrobial use and resistance have been low on the Mexican government's policy agenda. In early 2010, a multidisciplinary group of experts launched a national initiative for containment of antimicrobial resistance that was endorsed by major medical, veterinary and public health institutions. The initiative called for seven priority actions including the creation of an ad hoc intersectoral advisory group, a requirement that human and veterinary antibiotics be dispensed only with prescription, and the establishment of effective surveillance systems. A consensus document was disseminated among key decision-makers at the ministries of Health and Agriculture and the legislature. The Ministry of Health (MoH) enacted a decree effective as of August 2010, which enforced the regulations that required medical prescriptions for the sale of human antibiotics. While the information disseminated by the MoH did focus on the dangers of self-medication, it failed to highlight the inherent perils of antibiotic resistance or the consequences of antibiotic use in food-animals. Following the decree, there was a surge of medical offices controlled by retail pharmacies. In the veterinary sector, voluntary guidelines were developed for good husbandry practices, including antibiotic use in food animals; five antimicrobials for use in food-animals were banned. No intersectoral advisory group or surveillance systems were established. This study describes a bottom-top approach in Mexico for the development of a national strategy to improve antibiotic use and contain antimicrobial resistance. Its experiences suggest that, in countries such as Mexico that lack strong regulatory systems and surveillance capacities, a more systemic approach is warranted. Future efforts should begin with early involvement of key stakeholders and informing policy makers, professionals and the population at large about the critical importance of antibiotic resistance.

Effects of the expansion of doctors' offices adjacent to private pharmacies in Mexico: secondary data analysis of a national survey.

OBJECTIVES: To compare the sociodemographic characteristics, reasons for attending, perception of quality and associated out-of-pocket (OOP) expenditures of doctors' offices adjacent to private pharmacies (DAPPs) users with users of Social Security (SS), Ministry of Health (MoH), private doctor's offices independent from pharmacies and non-users. SETTING: Secondary data analysis of the 2012 National Survey of Health and Nutrition of Mexico. PARTICIPANTS: The study population comprised 25 852 individuals identified as having had a health problem 15 days before the survey, and a random sample of 12 799 ambulatory health service users. OUTCOME MEASURES: Sociodemographic characteristics, reasons for attending healthcare services, perception of quality and associated OOP expenditures. RESULTS: The distribution of users was as follows: DAPPs (9.2%), SS (16.1%), MoH (20.9%), private providers (15.4%) and non-users (38.5%); 65% of DAPP users were affiliated with a public institution (MoH 35%, SS 30%) and 35% reported not having health coverage. DAPP users considered the services inexpensive, convenient and with a short waiting time, yet they received ≥3 medications more often (67.2%, 95% CI 64.2% to 70.1%) than users of private doctors (55.7%, 95% CI 52.5% to 58.6%) and public institutions (SS 53.8%, 95% CI 51.6% to 55.9%; MoH 44.7%, 95% CI 42.5% to 47.0%). The probability of spending on consultations (88%, 95% CI 86% to 89%) and on medicines (97%, 95% CI 96% to 98%) was much higher for DAPP users when compared with SS (2%, 95% CI 2% to 3% and 12%, 95% CI 11% to 14%, respectively) and MoH users (11%, 95% CI 9% to 12% and 32%, 95% CI 30% to 34%, respectively). CONCLUSIONS: DAPPs counteract current financial protection policies since a significant percentage of their users were affiliated with a public institution, reported higher OOP spending and higher number of medicines prescribed than users of other providers. The overprescription should prompt studies to learn about DAPPs' quality of care, which may arise from the conflict of interest implicit in the linkage of prescribing and dispensing processes.

Strategies to improve the medical device life cycle in Mexico / Estrategias para mejorar el ciclo de vida de dispositivos médicos en México

Abstract Objective To analyze the role of stakeholders to three alternative strategies to improve processes and practices regarding the regulation, assessment, and management of orthopaedic medical devices in Mexico. Materials and methods The study was based on document analysis and 17 structured interviews with multiple key actors within the Mexican health system to inform a stakeholder analysis aiming at assessing the political feasibility of these strategies. Results Central level government agencies, those with a relation to quality of care, were identified as most relevant stakeholders to influence the adaption and application of the strategies. Major barriers identified are financial and human resources, and organisational culture towards reform. Conclusion Discussed strategies are political feasible. However, solving identified barriers is crucial to achieve changes directed to improve outputs and outcomes of medical device life cycle and positively influence the quality of health care and the health system's performance.

Resumen Objetivo Analizar el papel de actores clave ante tres estrategias para mejorar los procesos y prácticas relacionados con la regulación, evaluación y gestión de dispositivos médicos ortopédicos en México. Material y métodos Análisis de grupos de interés (stakeholder analysis) basado en un análisis documental y 17 entrevistas estructuradas con actores clave, dirigido a evaluar la viabilidad política de las estrategias. Resultados El papel de las agencias federales de gobierno, principalmente las relacionadas con calidad de atención, fue identificado como central y con mayor poder para influenciar la adaptación y aplicación de las estrategias. Como barreras se identificaron los recursos financieros y humanos, y reorientar la cultura organizacional hacia la reforma. Conclusión Las estrategias discutidas son políticamente viables. Resolver las barreras es importante para lograr cambios que optimicen el ciclo de vida de los dispositivos médicos e influyan positivamente en la calidad de atención y el desempeño del sistema de salud.

Impact of over-the-counter restrictions on antibiotic consumption in Brazil and Mexico.

BACKGROUND: In Latin American countries over-the-counter (OTC) dispensing of antibiotics is common. In 2010, both Mexico and Brazil implemented policies to enforce existing laws of restricting consumption of antibiotics only to patients presenting a prescription. The objective of the present study is therefore to evaluate the impact of OTC restrictions (2010) on antibiotics consumption in Brazil and Mexico. METHODS AND FINDINGS: Retail quarterly sales data in kilograms of oral and injectable antibiotics between January 2007 and June 2012 for Brazil and Mexico were obtained from IMS Health. The unit of analysis for antibiotics consumption was the defined daily dose per 1,000 inhabitants per day (DDD/TID) according to the WHO ATC classification system. Interrupted time series analysis was conducted using antihypertensives as reference group to account for changes occurring independently of the OTC restrictions directed at antibiotics. To reduce the effect of (a) seasonality and (b) autocorrelation, dummy variables and Prais-Winsten regression were used respectively. Between 2007 and 2012 total antibiotic usage increased in Brazil (from 5.7 to 8.5 DDD/TID, +49.3%) and decreased in Mexico (10.5 to 7.5 DDD/TID, -29.2%). Interrupted time series analysis showed a change in level of consumption of -1.35 DDD/TID (p<0.01) for Brazil and -1.17 DDD/TID (p<0.00) for Mexico. In Brazil the penicillins, sulfonamides and macrolides consumption had a decrease in level after the intervention of 0.64 DDD/TID (p = 0.02), 0.41 (p = 0.02) and 0.47 (p = 0.01) respectively. While in Mexico it was found that only penicillins and sulfonamides had significant changes in level of -0.86 DDD/TID (p<0.00) and -0.17 DDD/TID (p = 0.07). CONCLUSIONS: Despite different overall usage patterns of antibiotics in Brazil and Mexico, the effect of the OTC restrictions on antibiotics usage was similar. In Brazil the trend of increased usage of antibiotics was tempered after the OTC restrictions; in Mexico the trend of decreased usage was boosted.