Bioaccumulation and fate of pharmaceuticals in a Mediterranean coastal lagoon: Temporal variation and impact of a flash flood event.

Coastal ecosystems are particularly vulnerable to terrestrial inputs from human-impacted areas. The prevalence of wastewater treatment plants, unable to remove contaminants such as pharmaceuticals (PhACs), leads to their continuous input into the marine environment. In this paper, the seasonal occurrence of PhACs in a semi-confined coastal lagoon (the Mar Menor, south-eastern Spain) was studied during 2018 and 2019 by evaluating their presence in seawater and sediments, and their bioaccumulation in aquatic organisms. Temporal variation in the contamination levels was evaluated by comparison to a previous study carried out between 2010 and 2011 before the cessation of permanent discharges of treated wastewater into the lagoon. The impact of a flash flood event (September 2019) on PhACs pollution was also assessed. A total of seven compounds (out of 69 PhACs analysed) were found in seawater during 2018-2019, with a limited detection frequency (<33%) and concentrations (up to 11 ng/L of clarithromycin). Only carbamazepine was found in sediments (ND-1.2 ng/g dw), suggesting an improved environmental quality in comparison to 2010-2011 (when 24 and 13 compounds were detected in seawater and sediments, respectively). However, the biomonitoring of fish and molluscs showed a still remarkable accumulation of analgesic/anti-inflammatory drugs, lipid regulators, psychiatric drugs and ß-blocking agents, albeit not higher than in 2010. The flash flood event from 2019 increased the prevalence of PhACs in the lagoon, compared to the 2018-2019 sampling campaigns, especially in the upper water layer. After the flash flood the antibiotics clarithromycin and sulfapyridine yielded the highest concentrations ever reported in the lagoon (297 and 145 ng/L, respectively), alongside azithromycin in 2011 (155 ng/L). Flash flood events associated with sewer overflows and soil mobilisation, which are expected to increase under climate change scenarios, should be considered when assessing the risks posed by pharmaceuticals to vulnerable aquatic ecosystems in the coastal areas.

Contenido en Lisina y Arginina en soluciones de aminoácidos comercializadas en España / Comparison of Lysine and Arginine content in amino acid parenteral formulas approved in Spain

Introducción: La terapia basada en péptidos con radionúclidos representa una estrategia terapéutica eficaz frente a tumores neuroendocrinos pero no está exenta de efectos adversos como la nefrotoxicidad. Para prevenir esta nefrotoxicidad se emplean soluciones de aminoácidos de Lisina y Arginina. El objetivo de este artículo es conocer el contenido de L-Lisina, L-Arginina y la osmolaridad en las soluciones de aminoácidos autorizadas en España hasta marzo de 2021 y comparar la composición de éstas con las características de las soluciones nefroprotectoras indicadas en la ficha técnica de Lutecio. Métodos: Revisión de las fichas técnicas de todas aquellas soluciones de aminoácidos comercializadas en España. Las presentaciones comerciales con otros macronutrientes o electrolitos que no tengan una función de estabilidad o conservación de la solución fueron excluidas. Resultados: De las 23.658 presentaciones a marzo de 2021, fueron seleccionadas 90 soluciones. Tras esta primera selección, 18 presentaciones comerciales cumplían los criterios de inclusión. De las soluciones incluidas, al extrapolar el contenido a un volumen máximo de 2000 ml, cumplían con los objetivos de L-Lisina y L-Arginina. El contenido difería entre presentaciones pero contenían más L-Arginina y presentaban una alta osmolaridad. Discusión: Empleando un volumen máximo de 2000 ml, la mayoría de las soluciones incluidas en el estudio cumplían con los requisitos de L-Lisina y L-Arginina indicadas en la ficha técnica, si bien pueden existir problemas de administración por vía periférica por su osmolaridad. El hecho de que incluyan otros aminoácidos podría dar lugar a otro tipo de efectos adversos como toxicidad gastrointestinal. (AU)

Introduction: Peptide Receptor Radionuclide Therapy represents an effective therapeutic strategy against neuroendocrine tumors, but it is not without serious adverse effects such as nephrotoxicity. In order to prevent this nephrotoxicity, Lysine and Arginine amino acid solutions are used. The objectives of this article are to to know the content of L-Lysine, L-Arginine and the osmolarity in commercial amino acid solutions authorized in Spain until march 2021 and to compare their composition with the characteristics of the nephroprotective solutions indicated in the Lutetium technical data sheet. Methods: Review of all the technical sheets of all those amino acid solutions that were marketed in Spain. Commercial presentations with other macronutrients or electrolytes that do not have a stability or solution conservation function were excluded. Results: From the 23,658 commercial presentations as of march 2021, 90 parenteral nutrition solutions were selected. After this first selection, 18 commercial presentations met the inclusion criteria. Of the included solutions, when the content was extrapolated to a maximum volume of 2000 ml, they met the objectives of L-Lysine and L-Arginine. The content varied between solutions and was mostly the highest content in L-Arginine. The solutions studied had a high osmolarity. Discussion: Using a maximum volume of 2000 ml, most of the solutions included in the study fulfilled the requirements of the content of L-Lysine and L-Arginine indicated in the technical data sheet, although there may be problems of administration by peripheral route to the have a high osmolarity. The fact that they include other amino acids could lead to other types of adverse effects such as gastrointestinal toxicity. (AU)

El lactante hipotónico / The hypotonic infant

En la presente revisión pretendemos repasar conceptos básicos sobre la exploración y enfoque diagnóstico inicial del lactante hipotónico, centrándonos exclusivamente en aspectos recogidos mediante la anamnesis y la exploración, pilares fundamentales a la hora de abordar correctamente el diagnóstico de la hipotonía en el lactante. Mencionaremos las principales enfermedades que puedan manifestarse con hipotonía como síntoma guía, facilitando algunos datos clíni cos “clave” para la adecuada clasificación y enfoque diagnós tico. Subrayaremos la gran importancia en el momento actual de la identificación del lactante hipotónico arrefléxico, que exige de un despistaje urgente de la Atrofia Muscular Espinal (AME), que precisa de un tratamiento urgente (código AME En la presente revisión pretendemos repasar conceptos básicos sobre la exploración y enfoque diagnóstico inicial del lactante hipotónico, centrándonos exclusivamente en aspectos recogidos mediante la anamnesis y la exploración, pilares fundamentales a la hora de abordar correctamente el diagnóstico de la hipotonía en el lactante. Mencionaremos las principales enfermedades que puedan manifestarse con hipotonía como síntoma guía, facilitando algunos datos clíni cos “clave” para la adecuada clasificación y enfoque diagnós tico. Subrayaremos la gran importancia en el momento actual de la identificación del lactante hipotónico arrefléxico, que exige de un despistaje urgente de la Atrofia Muscular Espinal (AME), que precisa de un tratamiento urgente (código AME) (AU)

A holistic assessment of the sources, prevalence, and distribution of bisphenol A and analogues in water, sediments, biota and plastic litter of the Ebro Delta (Spain).

Bisphenol A (BPA) is one of the main ubiquitous compounds released from plastics in the environment. This compound, considered an endocrine disruptor, poses a risk to aquatic wildlife and human population, being included in multiple environmental monitoring programmes. Following the regulations restricting BPA use in the last years, BPA-like chemicals have been produced and used as BPA substitutes. However, they are not commonly included in monitoring programs yet and their presence is thus misrepresented, despite showing similar endocrine disrupting potential. In this work, an analytical method for analysing bisphenol A and five of its analogues (Bisphenol S, B, F, AF and Tetrabromobisphenol A) is described, validated for water (riverine, sea and wastewater), sediment, and biota (fish and biofilm) and applied to monitor their presence in the Ebro River Delta (NE Spain). In addition, plastic litter was also collected to evaluate their role as potential source of bisphenols. All compounds except BPF were detected in the analysed samples. Wastewater treatment plants (WWTPs) were discarded as major sources of BPs into the natural aquatic environment, as no BPs were detected in treated effluents. Indeed, the high levels of BPs in the natural environment could be related with direct discharge of raw wastewater from small rural population nucleus. The analysis of riverine plastic leachates yielded 4 out of the 6 BPs analysed, strengthening the hypothesis that plastic debris are also a source of BPs in the natural environment. Whereas Bisphenol S and BPA were detected in water and, to a limited extent, in biota, less polar analogues (mainly BPAF and TBBPA) were not found in any of the water samples. Instead, these hydrophobic BPs were found in fish tissues and biofilm, pointing out plastics and microplastics as their possible vectors. Finally, biofilm demonstrated its potential as sentinel of chemical contamination in freshwater environment.

Hydrocarbon exposure effect on energetic metabolism and immune response in Crassostrea virginica.

Crassostrea virginica was exposed to different light crude oil levels to assess the effect on transcriptomic response and metabolic rate. The exposure time was 21 days, and levels of 100 and 200 µg/L were used, including a control. The most significant difference among treatments was the overexpression of several genes associated with energy production, reactive oxygen species (ROS) regulation, immune system response, and inflammatory response. Also, a hydrocarbon concentration-related pattern was identified in ROS regulation, with a gene expression ratio near 1.8:1 between 200 and 100 µg/L treatments. Statistical analysis showed no interaction effect for metabolic rate; however, significant differences were found for oil concentration and time factors, with a higher oxygen consumption at 200 µg/L. Our findings provide novel information about the metabolic response of C. virginica during hydrocarbons exposure. In addition, our results point out which biological processes should be investigated as targets for searching bioindicators.

Zero valent iron nanoparticles and organic fertilizer assisted phytoremediation in a mining soil: Arsenic and mercury accumulation and effects on the antioxidative system of Medicago sativa L.

Zero valent iron nanoparticles (nZVI) attract interest given their effectiveness in soil remediation. However, little attention has been given to their impacts on plants. Likewise, although fertilizers are commonly used to enhance phytoremediation, their effects on As mobilization, resulting in potential toxic effects, require further study. In this context, we examined the impact of As and Hg accumulation on the antioxidative system of Medicago sativa grown in a soil amended with organic fertilizer and/or nZVI. The experiment consisted of 60 pots. Plants were pre-grown and transferred to pots, which were withdrawn along time for monitoring purposes. As and Hg were monitored in the soil-plant system, and parameters related to oxidative stress, photosynthetic pigments, and non-protein thiol compounds (NPTs) were measured. In general, the application of nZVI immobilized As in soil and increased Hg accumulation in the plant, although it surprisingly decreased oxidative stress. Plants in nZVI-treated soil also showed an increase in NPT content in roots. In contrast, the application of the fertilizer mobilized As, thereby improving bioaccumulation factors. However, when combining fertilizer with nZVI, the As accumulation is mitigated. This observation reveals that simultaneous amendments are a promising approach for soil stabilization and the phytomanagement of As/Hg-polluted soils.

Antegrade endoscopic dilatation as an alternative approach to primary obstructive megaureter. / Dilatación endoscópica anterograda como abordaje alternativo del megauréter obstructivo primario.

OBJECTIVES: Congenital primary obstructive megaureter (POM) is caused by ureterovesical junction stenosis, reduced peristalsis, and the resulting dilatation. Even though ureteral re-implantation remains the current gold standard technique, retrograde dilatation is considered as an effective therapeutic alternative with good results and growing proponents - to the extent it has become the technique of choice in some healthcare facilities. The objective was to present an alternative approach for treatment purposes. MATERIALS AND METHODS: This is the case of a 5-month-old infant with POM and pyonephrosis requiring nephrostomy and intravenous antibiotic therapy. Endoscopic dilatation was carried out by means of a percutaneous drainage in an antegrade fashion and did not require cystoscopy. RESULTS: The procedure was uneventful. During follow-up, ureterohydronephrosis decreased, while ureteral dilatation persisted to a lesser extent with an adequate peristalsis and absence of secondary VUR. The patient has had no symptoms after an 11-month follow-up. CONCLUSIONS: POM antegrade dilatation is an effective alternative in selected patients as it makes the pathology disappear.

OBJETIVOS: El megauréter obstructivo primario congénito (MOP) se produce por la estenosis de la unión ureterovesical, disminución en la peristalsis y su consecuente dilatación. Aunque actualmente el gold standard para el tratamiento de esta entidad sigue siendo el reimplante ureteral, la dilatación retrógrada se considera una alternativa terapéutica eficaz con buenos resultados y que está ganando cada vez más adeptos, siendo en algunos centros la técnica de elección. El objetivo es presentar una alternativa de abordaje para su tratamiento. MATERIAL Y METODOS: Se presenta el caso de un lactante de 5 meses con MOP afecto de pionefrosis que precisa nefrostomía y antibioterapia endovenosa. La dilatación endoscópica se realizó a través del drenaje percutáneo de manera anterógrada sin necesidad de cistoscopia. RESULTADOS: El procedimiento se llevó a cabo sin incidencias. En el seguimiento se apreció una disminución de la ureterohidronefrosis, persistiendo la dilatación del uréter en menor grado con adecuada peristalsis y la ausencia de RVU secundario. Tras 11 meses de seguimiento, permanece asintomático. CONCLUSIONES: La dilatación anterógrada del MOP es una alternativa efectiva en pacientes seleccionados que permite la resolución de la patología.

A mechanism for improved talc pleurodesis via foam delivery.

Talcum powder is recognized as the leading drug for pleurodesis, a treatment of choice for malignant pleural effusions. Recently, it was shown that hydrogel foam delivery systems significantly enhanced the number of adhesions between the chest wall and the lung in a New Zealand rabbit model due to the sol-gel transition. However, many questions still remain regarding the cause of improved efficacy, such as: (1) Would only hydrogel foams improve the efficacy of talc pleurodesis? (2) Is it possible to achieve the same efficacy of hydrogels using non-hydrogel foams? 3) What are the physicochemical properties that can be correlated to the efficacy of talc pleurodesis? In this study, we use non-hydrogel foam formulations to determine the efficacy of pleurodesis. Foam stability and rheology of the formulations were correlated to adhesion formation. The results clearly suggest a correlation of pleurodesis efficacy to the viscosity and modulus of the foam delivery system.

Dilatación endoscópica anterograda como abordaje alternativo del megauréter obstructivo primario / Antegrade endoscopic dilatation as an alternative approach to primary obstructive megaureter

Objetivos: El megauréter obstructivo primario congénito (MOP)se produce por la estenosis de la unión ureterovesical, disminución enla peristalsis y su consecuente dilatación. Aunque actualmente el goldstandard para el tratamiento de esta entidad sigue siendo el reimplanteureteral, la dilatación retrógrada se considera una alternativa terapéuticaeficaz con buenos resultados y que está ganando cada vez más adeptos,siendo en algunos centros la técnica de elección. El objetivo es presentaruna alternativa de abordaje para su tratamiento. Material y métodos: Se presenta el caso de un lactante de 5 mesescon MOP afecto de pionefrosis que precisa nefrostomía y antibioterapiaendovenosa. La dilatación endoscópica se realizó a través del drenajepercutáneo de manera anterógrada sin necesidad de cistoscopia. Resultados: El procedimiento se llevó a cabo sin incidencias. Enel seguimiento se apreció una disminución de la ureterohidronefrosis,persistiendo la dilatación del uréter en menor grado con adecuada peristalsis y la ausencia de RVU secundario. Tras 11 meses de seguimiento,permanece asintomático. Conclusiones: La dilatación anterógrada del MOP es una alternativa efectiva en pacientes seleccionados que permite la resoluciónde la patología.

Objectives: Congenital primary obstructive megaureter (POM) iscaused by ureterovesical junction stenosis, reduced peristalsis, and theresulting dilatation. Even though ureteral re-implantation remains thecurrent gold standard technique, retrograde dilatation is considered asan effective therapeutic alternative with good results and growing proponents – to the extent it has become the technique of choice in somehealthcare facilities. The objective was to present an alternative approachfor treatment purposes Materials and methods. This is the case of a 5-month-old infantwith POM and pyonephrosis requiring nephrostomy and intravenousantibiotic therapy. Endoscopic dilatation was carried out by means ofa percutaneous drainage in an antegrade fashion and did not requirecystoscopy. Results: The procedure was uneventful. During follow-up, uretero-hydronephrosis decreased, while ureteral dilatation persisted to a lesserextent with an adequate peristalsis and absence of secondary VUR. Thepatient has had no symptoms after an 11-month follow-up. Conclusions: POM antegrade dilatation is an effective alternativein selected patients as it makes the pathology disappear.(AU)

#SoMe4PedSurg: redes sociales, formación e innovación digital en cirugía pediátrica / #SoMe4PedSurg: social media, education, and digital innovation in pediatric surgery

No disponible

Time-Frequency Analysis of Cardiovascular Variability during an Orthostatic Stress by Complete EMD.

Diverse analysis techniques have been used to comprehend the regulation by the autonomic nervous system (ANS) of the cardiovascular system when a human being faces a stressor. Recently, however, the complete ensemble empirical mode decomposition (EMD) with adaptive noise (CEEMDAN) allows analyzing nonstationary signals in a nonlinear and time- variant way. Consequently, CEEMDAN may provide a means to obtain clues about ANS regulation in health and disease. In this study, we analyze the average Hilbert-Huang spectrum (HHS) of cardiovascular variability signals by CEEMDAN during a head-up tilt test (HUTT) in 12 healthy female subjects and 18 orthostatic intolerance female patients. Beat-to-beat intervals (BBI) as well as systolic (SYS) blood pressure variability time series were analyzed. In addition, instantaneous amplitudes and frequencies of specific intrinsic mode functions (IMF) were investigated separately to define the influence of the disease on ANS regulation. Female groups demonstrated statistical differences in the high-frequency band of BBI but higher differences for the high and low-frequency bands of SYS from the mechanical transition of HUTT.Clinical Relevance- A relevant outcome of the study is the average HHS of healthy female subjects along HUTT. This HHS may be used as reference to help diagnose OI when HHS of the cardiovascular variability signals of any subject deviates from the normal course.

Anaphylaxis at school. Are we prepared? Could we improve?

INTRODUCTION AND OBJECTIVES: Food allergy is a highly prevalent disorder. Anaphylaxis is the most serious consequence, and reactions often occur in schools. In the event of anaphylactic reaction prompt treatment is key and should be initiated by school personnel. The aim of this study was to assess the level of knowledge of the management of anaphylaxis, and to determine if it improves after a training session among school staff. MATERIALS AND METHODS: Descriptive study carried out by means of a pre-and post-training questionnaire completed by participants before and after a training session held at the school. Data from the same participants before and after the educational session were compared using McNemar's test. RESULTS: Three schools were enrolled (with a total of 38 children with food allergy) and 53 participants (85% teachers, 15% canteen staff) were trained. In the pre-training surveys, 83% said they had a Student's Allergic Reaction Management Plan, 56% had met with parents, 83% recognised some symptoms of allergic reaction but only 41% recognised anaphylaxis, 16% knew when to use adrenaline, 15% knew how to use it and 19% knew how to act after administering it. In the post-training questionnaires, 100% were satisfied and believed they had improved their knowledge, 93% recognised anaphylaxis and 95% the treatment of choice. CONCLUSIONS: Prior to the intervention their knowledge was insufficient, but it improved considerably after simple training. It also increased the confidence of the staff, which will be decisive when responding to an anaphylactic reaction. We believe that a compulsory training programme should be implemented universally in all schools

No disponible

A new scenario in metastatic renal cell carcinoma: a SOG-GU consensus.

BACKGROUND: This article describes and compares approved targeted therapies and the newer immunotherapy agents. MATERIALS AND METHODS: This article especially performs an in-depth review of currently available data for tivozanib, explaining its mechanism of action, its safety profile and its role as an efficacy drug in the management of renal cancer. RESULTS: Despite the fact that the treatment of advanced RCC has been dramatically modified in recent years, durable remissions are scarce and it remains a lethal disease. For first- and second-line therapy, there is now growing evidence to guide the selection of the appropriate treatment. CONCLUSIONS: Several TKIs are standard of care at different settings. Among those approved TKIs, tivozanib has similar efficacy than others with a better safety profile. The use of prognostic factors is critical to the selection of optimal therapy.

Anaphylaxis at school. Are we prepared? Could we improve?

INTRODUCTION AND OBJECTIVES: Food allergy is a highly prevalent disorder. Anaphylaxis is the most serious consequence, and reactions often occur in schools. In the event of anaphylactic reaction prompt treatment is key and should be initiated by school personnel. The aim of this study was to assess the level of knowledge of the management of anaphylaxis, and to determine if it improves after a training session among school staff. MATERIALS AND METHODS: Descriptive study carried out by means of a pre-and post-training questionnaire completed by participants before and after a training session held at the school. Data from the same participants before and after the educational session were compared using McNemar's test. RESULTS: Three schools were enrolled (with a total of 38 children with food allergy) and 53 participants (85% teachers, 15% canteen staff) were trained. In the pre-training surveys, 83% said they had a Student's Allergic Reaction Management Plan, 56% had met with parents, 83% recognised some symptoms of allergic reaction but only 41% recognised anaphylaxis, 16% knew when to use adrenaline, 15% knew how to use it and 19% knew how to act after administering it. In the post-training questionnaires, 100% were satisfied and believed they had improved their knowledge, 93% recognised anaphylaxis and 95% the treatment of choice. CONCLUSIONS: Prior to the intervention their knowledge was insufficient, but it improved considerably after simple training. It also increased the confidence of the staff, which will be decisive when responding to an anaphylactic reaction. We believe that a compulsory training programme should be implemented universally in all schools.

Hiperactividad paroxística simpática secundaria a una encefalitis herpética / Paroxysmal sympathetic hyperactivity after herpetic encephalitis

INTRODUCCIÓN: La hiperactividad simpática paroxística (HSP) es un síndrome caracterizado por episodios repetidos de aumento de actividad simpática (taquicardia, taquipnea, hipertensión arterial, fiebre, sudoración) y actividad motora (distonía, hiperextensión) en pacientes con un daño cerebral adquirido. CASO CLÍNICO: Presentamos el caso de un lactante con HSP secundaria a una encefalitis aguda por el virus del herpes simple tipo 1. CONCLUSIÓN: La HSP es una entidad infradiagnosticada, cuyo tratamiento, basado en la combinación de fármacos, debe ser precoz para evitar comorbilidades y mejorar su pronóstico

INTRODUCTION: Paroxysmal sympathetic hyperactivity (PSH), previously known as dysautonomia or sympathetic storming, is a syndrome characterized by repeated episodes of increases in sympathetic activity (tachycardia, tachypnoea, hypertension, fever and sweating) and motor activity (dystonia, hyperextension) in patients with an acquired brain injury. CASE REPORT: We present the case of a toddler with PSH after acute encephalitis by herpes simplex virus 1. CONCLUSIONS: The PSH is an underdiagnosed entity whose treatment, based on the combination of different drugs, must be premature to avoid comorbidities and to improve its prognosis

Fe3O4@Au nanoparticles-based magnetoplatform for the HMGA maize endogenous gene electrochemical genosensing.

This work addresses a technological advance applied to the construction of a magnetogenoassay with electrochemical transduction for the maize taxon-specific (HMGA gene) detection using gold-coated magnetic nanoparticles as nanosized platform. Superparamagnetic core-shell Fe3O4@Au nanoparticles (10.4 ±â€¯1.7 nm) were used to assemble the genoassay through the covalent immobilization of HMGA DNA probes onto carboxylated self-assembled monolayers at the nanoparticles surface. A hybridization reaction using sandwich format was selected to prevent inefficient hybridization connected with stable secondary DNA structures using also fluorescein isothiocyanate as DNA signaling tag. The labelling of the hybridization reaction with enzymes allowed the chronoamperometric measurement of the peroxidase activity linked to the nanoplatform located on gold surface. Using this electrochemical magnetogenoassay a linear concentration range from 0.5 to 5 nM and a LOD of 90 pM with a RSD <1.2% was calculated. Certified maize was evaluated without further purification after PCR amplification. This work highlights the efficacy of the electrochemical magnetogenoassay for the HMGA detection, showing its potential as alternative procedure for the verification of the compliance of the legislation.

Desarrollo de solución inyectable de ribavirina en el Centro Militar de Farmacia de la Defensa como tratamiento de urgencia frente a agentes víricos altamente infecciosos. Cobertura de una laguna terapéutica / Development of the injectable ribavirin solution at the Military Defense Pharmacy Center as an emergency treatment against highly infectious agents. Coverage of a therapeutic lagoon

Antecedentes: España por su situación geopolítica no está exenta de amenazas y desafíos asociados a enfermedades infecciosas víricas como las «fiebres hemorrágicas víricas». Implementar acciones para disminuir estos riesgos frente a agentes víricos con el desarrollo de un tratamiento de urgencia por vía intravenosa resulta de gran interés. Objetivos: Desarrollar dos formulaciones de Ribavirina 100 mg/ml con distintos excipientes y condiciones de fabricación para buscar la formulación más estable. Material y métodos: Se ha utilizado ribavirina, distintos tampones y agua para inyectables. Se ha evaluado alteraciones físicas, riqueza y pH siguiendo especificaciones de la monografía de la Farmacopea Europea. Resultados: Se exponen resultados de pH y riqueza de ambas formulaciones con y sin esterilización terminal. Conclusiones: Los resultados obtenidos cumplen especificaciones para ambas formulaciones, demostrando una estabilidad química tras su conservación en condiciones de estudios a largo plazo durante 12 meses y acelerados durante 6 meses. El desarrollo de la ribavirina 100 mg/ml (10% w/v) inyectable satisface una necesidad terapéutica relacionada con el tratamiento de primera elección en enfermedades víricas altamente contagiosas que carecen de tratamientos eficaces

Background: Spain, due to its geopolitical situation, is not exempt from the threats and challenges associated with viral infectious diseases such as the «viral hemorrhagic fevers». Implementing actions to reduce these risks with the development of an emergency treatment against these viral agents for intravenous is of great interest. Objective: Develop two formulations of Ribavirin 100 mg/ml with different excipients and manufacturing conditions to look for the most stable formulation. Material and methods: Ribavirin, various buffers and water for injections have been used. Physical alterations, richness and pH have been evaluated following specifications of European Pharmacopoeia monograp. Results: Results of pH and richness of both formulations are exposed with and without terminal sterilization. Conclusions: The results obtained meet specifications for both formulations, demonstrating chemical stability after preservation under long-term study conditions for 12 months and accelerated for 6 months. The development of injectable 100 mg/ml ribavirin (10% w/v) satisfies a therapeutic need related to the treatment of first choice in highly contagious viral diseases that lack treatments