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The pharmacotechnical expert group of the French Society of Oncological Pharmacy presents the results of its national survey carried out in 2021 in the form of an inventory of pharmaceutical compounding units dedicated to oncology. Premises, equipment, controls, production flows and trends are described in this article, providing an overview of the sector at a time when the new Good Manufacturing Practices (GMP) are applicable. This overview will allow us to better address the needs and expectations of production pharmacists regarding the application of GMP and the development of their units.
Subject(s)
Drug Compounding , France , Drug Compounding/standards , Humans , Medical Oncology , Antineoplastic Agents , Pharmacists , Neoplasms/drug therapy , PharmaciesABSTRACT
Validating the efficacy of sporicidal agents is a critical step in current good manufacturing practices for disinfection requirements. A limitation is that the poor quality of spores can lead to false positive sporicidal results. The aim of this study was to explore optimal sporulation and purification methods in Bacillus spores. Spores of 7 Bacillus strains were produced in 5 different sporulation media. After density centrifugation, spore yields were measured by phase-contrast microscopy and enumeration assays. Effects of purification methods including heat, sonication and lysozyme, and maturation on spore qualities were determined by sodium hypochlorite sporicidal assay. Difco sporulation media was identified as the preferred sporulation medium for 4 out of 7 tested Bacillus strains. Sporulation rates in B. cereus, B. sphaericus, and B. thuringiensis were higher at 30°C than the rates at 37°C at a difference of 5%, 65%, and 20%, respectively. Bacillus licheniformis favored Mn2+-amended 10% Columbia Broth at 37°C for sporulation with 40-72% higher sporulation rates than other media. The maximum sporulation rates of B. cereus and B. thuringiensis were observed on double-strength Schaeffer's-glucose broth. All studied purification methods improved the spore purity with strain variations. However, intense heat (80°C for 20 min) and lysozyme (100 µg/mL) treatment impaired the spore quality of specific Bacillus strains by sensitizing them against sodium hypochlorite. The length of the maturation period had an impact on the spore resistance, and the most optimal maturation periods ranged from 7 to 21 days in Bacillus strains. The results of this study will pave the way for further evaluation of the sporicidal activity of disinfectants.
Subject(s)
Bacillus , Disinfectants , Disinfectants/pharmacology , Muramidase , Sodium Hypochlorite/pharmacology , Spores, BacterialABSTRACT
The potential usefulness of lopinavir-ritonavir on Covid 19 infection during the first wave of contamination in France had boosted Kaletra® syrup prescription to the point of causing its national shortage. In the intensive care units of Parisian hospitals in charge of patients with life-threatening viral contamination, caregivers had to resort to lopinavir-ritonavir-based tablets, crushing them and then dispersing the powder in milk to facilitate administration by nasogastric tube. The difficulties and poor control of this degraded mode, which does not always ensure control of the amount of the drug in the prepared dose and may induce insufficient antiviral exposure, led us to develop in a very short time, while ensuring quality control proportional to the risk, a liquid form as an alternative to Kaletra® oral solution shortage. For this purpose, we describe this compounding formulation and its preparation process, while justifying the quality control strategy adapted to the risk as well as its chemical and physical stability. Based on the chemical and physical studies, the preparation was showed to be stable during at least 2 months between +2°C and +8°C and 1 week at room temperature. This has resulted in the design of kits that include multi-dose packaging and a measuring device and contain the appropriate quantities of drugs to ensure at least one week's treatment for each patient, during which time the kit in use can be stored at room temperature. The intensive care team used this treatment under conditions that they considered well adapted until the imported specialty became available.
Subject(s)
COVID-19 Drug Treatment , Ritonavir , Drug Combinations , Hospitals , Humans , Lopinavir/pharmacology , Lopinavir/therapeutic use , Ritonavir/therapeutic use , SARS-CoV-2 , SuspensionsABSTRACT
The pharmacy compounding of personalized preparations has evolved a great deal, and with it, the way of working and the legal requirements have also evolved. An adequate pharmaceutical quality system for personalized preparations presents fundamental differences with respect to the system designed for industrial medicines since the size, complexity, and characteristics of the activity of the manufacturing laboratory and the applications and uses of the manufactured medicines must be taken into account. Legislation must advance and adapt to the needs of personalized preparations, filling the deficiencies currently found in this field. The limitations of personalized preparation in its pharmaceutical quality system are analysed and a method based on a proficiency testing program specially designed to overcome these limitations is proposed: the Personalized Preparation Quality Assurance Program (PACMI). This method makes it possible to expand the samples and destructive tests, and dedicate more resources, facilities, and equipment. It allows for more in-depth knowledge of the product and the processes used, and for proposed improvements that increase the overall quality for improved patient health. PACMI introduces tools used in risk management in order to guarantee the quality of an essentially heterogeneous service: personalized preparation.
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Pharmaceutical compounding using the molding technique is the currently applied method for the on-demand manufacturing of suppositories and pessaries. Potential errors of this method are difficult to detect, and the possibilities of individualization of size and shape of the suppositories are limited. In this study, a syringe-based semi-solid 3D printing technique was developed for the manufacturing of suppositories in three different printing designs with the suppository bases polyethylene glycol (PEG) and hard fat (HF). The 3D printed suppositories were analyzed for their visual appearance, uniformity of mass and content, diametrical dimension, breaking force and release behavior and compared to suppositories of the same composition prepared by a commonly used molding technique. The results showed no adverse properties for the 3D printed suppositories compared to the molded ones. Moreover, the easy adaptation of shape using the 3D printing technique was demonstrated by the printing of different sizes and infill structures. Thus, 3D printing has great potential to complement the available manufacturing methods for compounded suppositories, as it represents an automated system for the individualized manufacturing of suppositories that meet patients' needs.
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BACKGROUND: Augmented reality (AR) is a technological approach which combines virtual objects such as text, pictures or videos with physical objects (real-world). The study aimed to design, implement and validate a mobile-based AR application, as a self-paced, interactive, student-centered learning tool be used in the pharmaceutical compounding laboratory course for first year pharmacy students. METHOD: A mobile-based AR application (Amplified Rx app; HeyPayLess Inc) compatible with iOS and android operating system was developed. A cross-over study design was conducted where alternatively, one group was subjected to ARx app implementation in 8 formulations and the other group served as control. The reception and benefits to students were assessed via a 10 questions survey. In this case, 69 (2019) and 55 (2020) students participated in the study. RESULT: Students' use of ARx app was increased in 2020 which indicates its usefulness. For acceptability, leaners enjoyed interactive materials and tutorial videos were the most used and appealing item. Learners described the installation, scanning and operation to be very easy in both years. 86.95% of learners were confident conducting the experiments with the assistance of ARx app in 2019 and increased to 92.73% in 2020. 33.33% considered ARx app to be the most helpful resource in 2019, and the percent was significantly increased to 76.36% in 2020. CONCLUSION: AR technology implementation in pharmaceutical education could create student-centered engaging and interactive learning experience in fundamental areas such as pharmaceutical compounding laboratories.
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PURPOSE: To investigate the safety of pharmaceutically compounded syringes for intravitreal administration of anti-vascular endothelial growth factor (anti-VEGF) drugs. METHODS: Single center, retrospective chart review. From 2015 to 2019, Oslo University Hospital, Norway gradually implemented pharmaceutical compounding and splitting of bevacizumab, ranibizumab, and aflibercept vials into multiple prefilled syringes for intravitreal use. Medical records of all post-injection endophthalmitis (PIE) cases in this 5-year period were reviewed. The incidences of PIE associated with compounded and clinician-withdrawn syringes were compared. RESULTS: In 5 years, the total number of anti-VEGF injections was 112,926; 68,150 procedures (60%) utilized compounded syringes, and 44,776 procedures (40%) utilized clinician-withdrawn syringes. A total of 11 PIE cases were identified (incidence 0.10 per 1000; 95% CI 0.05-0.17). Five PIE cases were associated with compounded syringes (incidence 0.07 per 1000; 95% CI 0.03-0.17); 3 of these were culture positive. Six PIE cases were associated with clinician-withdrawn syringes (incidence 0.13 per 1000; 95% CI 0.06-0.29); 2 of these were culture positive. The relative risk of PIE following procedures utilizing compounded versus clinician-withdrawn syringes was 0.55 (95% CI 0.17-1.79; p = 0.32). CONCLUSION: Use of compounded anti-VEGF drugs in a large clinical setting was not associated with an altered risk of PIE. The finding adds to the evidence that splitting of vials into prefilled syringes for intravitreal injections is safe, provided that an appropriate pharmaceutical compounding procedure is strictly followed.
Subject(s)
Endophthalmitis , Endothelial Growth Factors , Angiogenesis Inhibitors , Bevacizumab/adverse effects , Endophthalmitis/drug therapy , Endophthalmitis/epidemiology , Endophthalmitis/etiology , Humans , Incidence , Intravitreal Injections , Pharmaceutical Preparations , Ranibizumab/adverse effects , Retrospective Studies , Vascular Endothelial Growth Factor AABSTRACT
Pharmaceutical compounding is an important component of pharmacy practice despite its low prevalence. Several therapeutic needs can be met by a compounded medicine such as dosing adjusted for pediatric patients, special drug combinations, medicines for patients allergic to a given excipient, and medicines for orphan drugs not provided by the pharmaceutical industry. Examples of such applications are provided in this review. Adherence to medication is a critical public health issue as nonadherence to pharmacotherapy has been associated with adverse outcomes and higher costs of patient care. Adherence to therapy represents a key factor in the reduction in morbidity and mortality and optimization of the use of financial resources. The role of pharmaceutical compounding in promoting medication adherence is underexploited. The customization might represent a positive reinforcement of the initiation of the treatment, while implementation and persistence might also be favored in a pharmacy setting. However, studies addressing the influence of compounding in adherence promotion are lacking in the literature. The results of such studies could support health policies including proper regulatory framework, pharmacist training, and information to health care practitioners.
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Pharmaceutical compounding is a core activity in the preparation of patient-specific dosage forms. In the current study we aimed to investigate whether 3D printing could be employed for the preparation of pediatric-friendly personalized dosage forms that fulfil the acceptance criteria specified in the pharmacopoeias for conventional dosage forms. We then compared the 3D printed dosage forms with the same formulations prepared with mold-casting, a method frequently applied during pharmaceutical compounding. The molded dosage forms failed to pass most of the quality control tests, including the mass uniformity and content uniformity tests, as well as dose accuracy, contrary to the 3D printed, which not only passed all tests but also enabled precision overdose adjustment. Hence, 3D printing of chocolate-based dosage forms may effectively serve as an acceptable alternative method to mold casting in compounding patient-specific medication at the point-of-care.
Subject(s)
Chocolate , Drug Compounding/methods , Printing, Three-Dimensional , Technology, Pharmaceutical/methods , Child , Dosage Forms , Drug Compounding/standards , Humans , Pharmaceutical Preparations , Quality Control , Technology, Pharmaceutical/trendsABSTRACT
Drug repositioning is the scientific strategy of investigating existing drugs for additional clinical indications. The advantages of drug repositioning are that it benefits patients and that it adds new indications to existing drugs for lower costs compared to de novo drug development. Clinical research groups recognizing efficacy of these "old" drugs for a new indications often face an uphill struggle due to a lack of funding and support because of poor structural and regulatory support for clinical drug development. The current framework for drug repositioning allows "venture capital" companies to abuse loopholes in the legislation to gain long-term market authorization among with excessive high pricing. A new regulatory framework is needed to prevent abuse of the legislation and promote clinical investigator-driven drug repositioning. The COVID-19 pandemic has boosted funding and regulatory support for drug repositioning. The lessons learned from the COVID-19 pandemic should be implemented in a new clear blueprint for drug repositioning. This blueprint should guide clinicians through legislation for drug repositioning in the EU. This review summarizes the routes for registration and discusses the current state of drug repositioning in Europe.
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BACKGROUND: Pharmaceutical compounding of orphan active ingredients can offer cost-effective treatment to patients when no other drug product is available for a rare disease or during periods of drug product shortages. Additionally, it allows customized therapy for patients with rare diseases. However, standardized compounding formulas and procedures, and monographs are required to ensure the patients' safety. RESULTS: Standardized formulas and compounding procedures were developed for seven orphan active ingredients (L-arginine, sodium benzoate, sodium phenylbutyrate, L-carnitine, chenodesoxycholic acid, primaquine phosphate, pyridoxal phosphate) and one non-orphan molecule (sodium perchlorate) regularly compounded by hospital pharmacists for extemporaneous use. The stability of these formulations was evaluated over 3 months at refrigerated (5 °C) and standard storage conditions (25 °C/60%RH) using HPLC-based assays and a suitable shelf life was assigned to the formulations. Additionally, suitable analytical methods for quality control of formulations of pyridoxal phosphate and sodium perchlorate were developed as monographs for these components were not available in the European Pharmacopeia or United States Pharmacopeia. CONCLUSIONS: Availability of compounding formulas and protocols, as well as stability information, for orphan active ingredients can improve patients' access to treatment for rare diseases. Such data were collected for seven orphan active ingredients to treat patients with rare diseases when no other treatment is available. More efforts are needed to develop standardized formulas and compounding procedures for additional orphan active ingredients whose clinical efficacy is well-known but which are not available as products with a marketing authorization. Additionally, a legal framework at EU level is required to enable the full potential of pharmaceutical compounding for orphan active ingredients.
Subject(s)
Drug Compounding/methods , Rare Diseases , Arginine/analysis , Belgium , Carnitine/analysis , Excipients/analysis , Humans , Pharmacists , Phenylbutyrates/analysis , Primaquine/analysis , Pyridoxal Phosphate/analysis , Sodium Benzoate/analysisABSTRACT
BACKGROUND: Pharmaceutical compounding preparations, produced by (hospital) pharmacies, usually do not have marketing authorization. As a consequence, some of these pharmaceutical compounding preparations can be picked-up by a pharmaceutical company to obtain marketing authorization, often leading to price increases. An example is the 3,4-diaminopyridine slow release (3,4-DAP SR) tablets for Lambert-Eaton Myasthenic Syndrome (LEMS). In 2009 marketing authorization was given for the commercial immediate release phosphate salt of the drug, including a fifty-fold price increase compared to the pharmaceutical compounding preparation. Obtaining marketing authorization for 3,4-DAP SR by academia might have been a solution to prevent this price increase. To determine whether the available data of a pharmaceutical compounding preparation with long-term experience in regular care are adequate to obtain marketing authorization, 3,4-DAP SR is used as a case study. METHODS: A retrospective qualitative case-study was performed. Initially, document analysis was executed by collecting the required data for marketing authorization in general and whether data of Firdapse® and 3,4-DAP SR met these requirements. Secondly, the (non-) available data of the two formulations were compared with each other to determine the differences in availability. RESULTS: At the time of approval, almost all data were available for both Firdapse® and 3,4-DAP SR. Conversely, much of the data used for the approval of Firdapse® originated from the 3,4-DAP immediate release (3,4-DAP IR) formulation. Only two bioequivalence studies and one pharmacology safety study was performed with Firdapse® before marketing authorization application. CONCLUSIONS: In conclusion, at time Firdapse® obtained approval, the data available did not differ substantially from 3,4-DAP SR, indicating that approval with 3,4-DAP SR would have been possible. We make a plea for approval of orphan medicinal products developed and manufactured by academic institutions as to keep utilization of these products affordable.
Subject(s)
4-Aminopyridine/analogs & derivatives , Drug Compounding/methods , Lambert-Eaton Myasthenic Syndrome/drug therapy , Marketing/methods , Orphan Drug Production/methods , 4-Aminopyridine/economics , 4-Aminopyridine/therapeutic use , Amifampridine , Direct-to-Consumer Advertising/economics , Direct-to-Consumer Advertising/legislation & jurisprudence , Direct-to-Consumer Advertising/methods , Drug Compounding/economics , Humans , Lambert-Eaton Myasthenic Syndrome/economics , Marketing/economics , Marketing/legislation & jurisprudence , Orphan Drug Production/economics , Orphan Drug Production/legislation & jurisprudence , Potassium Channel Blockers/economics , Potassium Channel Blockers/therapeutic use , Qualitative Research , Retrospective StudiesABSTRACT
BACKGROUND: When there is no authorized on- or in absence even no off-label treatment for patients with rare diseases, pharmacists have to compound medicinal products to meet the patients special needs. However it is important that there is evidence in the medical and/or pharmaceutical literature for such compounded medications. POSITION STATEMENT: Pharmaceutical compounding must be performed in the best possible circumstances by certified practitioners (pharmacists) using validated standard operating procedures (standardized formulations) in order to obtain medicinal products of the highest quality to assure patient safety. More than 60 compounding procedures were identified in 17 on-line pharmaceutical compounding reference sources worldwide but more operating procedures still need to be validated. All ingredients used in the preparation of the compounded medication must be accompanied by a certificate of analysis and full records of the pharmaceutical production process need to be kept for full traceability and accountability.
Subject(s)
Rare Diseases , Drug Compounding , HumansABSTRACT
A lock solution composed of gentamicin sulfate (5 mg/mL) and ethylenediaminetetraacetic acid disodium salt (EDTA-Na2, 30 mg/mL) could fully eradicate in vivo bacterial biofilms in totally implantable venous access ports (TIVAP). In this study, fabrication, conditioning and sterilization processes of antimicrobial lock solution (ALS) were detailed and completed by a stability study. Stability of ALS was conducted for 12 months in vial (25 °C ± 2 °C, 60% ± 5% relative humidity (RH), and at 40 °C ± 2 °C, RH 75% ± 5%) and for 24 h and 72 h in TIVAP (40 °C ± 2 °C, RH 75% ± 5%). A stability indicating HPLC assay with UV detection for simultaneous quantification of gentamicin sulfate and EDTA-Na2 was developed. ALS was assayed by ion-pairing high performance liquid chromatography (HPLC) needing gentamicin derivatization, EDTA-Na2 metallocomplexation of samples and gradient mobile phase. HPLC methods to separate four gentamicin components and EDTA-Na2 were validated. Efficiency of sterility procedure and conditioning of ALS was confirmed by bacterial endotoxins and sterility tests. Physicochemical stability of ALS was determined by visual inspection, osmolality, pH, and sub-visible particle counting. Results confirmed that the stability of ALS in vials was maintained for 12 months and 24 h and 72 h in TIVAP.
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Introdução: Medicamento manipulado é a preparação farmacêutica obtido por procedimento farmacotécnico a partir de uma prescrição de profissional habilitado destinada a um paciente individualizado ou cuja fórmula esteja inscrita no Formulário Nacional ou Internacional. Objetivo: Descrever o perfil das notificações relacionadas aos medicamentos manipulados, reportadas ao Sistema Nacional de Notificação em Vigilância Sanitária (Notivisa). Método: Estudo exploratório descritivo, retrospectivo ao período de 2006-2016 das notificações de medicamentos manipulados reportadas ao Notivisa. Os dados foram registrados e analisados no programa Excel versão para Windows 3.5.4. Resultados: De um total de 108.400 notificações referentes a medicamentos no período estudado, 335 (0,32%) foram relacionadas a notificações de medicamentos manipulados. As queixas técnicas (QT) obtiveram 90,40% das notificações, enquanto os eventos adversos (EA) obtiveram 9,60%. A Região Sudeste foi a principal notificadora (66,00%) e o estado de São Paulo, responsável por 54,00% do total das notificações. Os hospitais foram as instituições com maior frequência de notificação (81,00%). Foi possível avaliar os motivos que geraram as notificações, das quais as alterações relacionadas ao aspecto da preparação farmacêutica foram as predominantes dentre as QT, enquanto para os EA destacaram-se as reações adversas a medicamentos. Conclusões: As ocorrências observadas na farmacovigilância de medicamentos manipulados são próprias de cada produto com suas particularidades, embora o que se busque seja um padrão. Desta forma, tal observação poderá prevenir a ocorrência de danos à população exposta a situações semelhantes, se for devidamente notificada e amplamente divulgada.
Introduction: Compounded drug is a pharmaceutical preparation obtained by a pharmacotechnical procedure from a prescription of a qualified professional intended for an individualized patient, or whose formula is registered in the National or International Form. Objective: To describe the profile of notifications related to compounded drugs, reported to the National Health Surveillance Notification System (Notivisa). Method: Descriptive exploratory study, retrospective to the period 2006-2016, of the notifications of compounded drugs reported to Notivisa. Data were recorded and analyzed using the Excel program, version for Windows 3.5.4. Results: Of a total of 108,400 notifications referring to medicines in the studied period, 335 (0.32%) were related to reports of compounded drugs. Technical complaints (QT) obtained 90.40% of the notifications, while adverse events (AE) obtained 9.60%. The Southeast region was the main notifier (66.00%), and the state of São Paulo was responsible for 54.00% of the total notifications. Hospitals were the institutions with the highest frequency of notification (81.00%). It was possible to evaluate the reasons that generated the notifications, of which the changes related to the aspect of the pharmaceutical preparation were the predominant among the QT, while for the AEs, the adverse drug reactions stood out. Conclusions: The occurrences observed in the pharmacovigilance of compounded drugs are specific to each product with its particularities, although, what is sought is a pattern. In this way, such observation can prevent the occurrence of damages to the population exposed to similar situations, if it is duly notified and widely disseminated.
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OBJECTIVES: Ketoprofen is an analgesic, anti-inflammatory agent commonly used in the management of chronic musculoskeletal pain. The aim of this study is to characterize the percutaneous absorption of 2 ketoprofen formulations (ketoprofen 10% in Pluronic Lecithin Organogel (PLO) and ketoprofen 10% in Lipoderm, referred to as phospholipid base), when applied to the human cadaver trunk skin, in vitro, using the Franz skin finite dose model. PLO and phospholipid base are vehicles used to facilitate the delivery of drugs into and through the skin following topical applications. METHODS: The percutaneous absorption of ketoprofen was evaluated using human cadaver trunk skin from 3 donors. The skin was cut into small sections and cultured within Franz diffusion cells. A variable finite dose of each formulation was then applied to 3 replicate skin sections per donor and receptor solutions were collected at predetermined time points (0, 4, 8, 12, 24, 32, and 48 hr). After the last receptor sample was collected, skin surfaces were washed and split into epidermis and dermis. Collected samples were analyzed using HPLC. RESULTS: Both PLO and phospholipid base were capable of facilitating the absorption of ketoprofen across human cadaver trunk skin. However, ketoprofen, when in phospholipid base, showed higher mean total absorption (p = 0.022) and faster rate of absorption (p < 0.05 at 2, 6, 10, and 18 hr) than when in PLO. CONCLUSION: Chronic musculoskeletal pain can be a major burden for most patients, affecting their lifestyle and reducing overall quality of life. When compared to PLO, phospholipid base has the ability to potentially deliver higher concentrations of ketoprofen to underlying soft tissues and at a more rapid rate. With more ketoprofen at the site of injury, the analgesic and anti-inflammatory effects will likely be enhanced, potentially reducing pain and improving quality of life.
Subject(s)
Anti-Inflammatory Agents, Non-Steroidal/metabolism , Ketoprofen/metabolism , Models, Biological , Administration, Topical , Anti-Inflammatory Agents, Non-Steroidal/administration & dosage , Cadaver , Humans , Ketoprofen/administration & dosage , Lecithins/pharmacology , Phospholipids/administration & dosage , Phospholipids/metabolism , Phospholipids/pharmacology , Skin/metabolism , Skin AbsorptionABSTRACT
The Spanish Network for the Study of Paediatric Tuberculosis has shown a lack of national consensus on the treatment of tuberculosis in children, partly due to the unavailability of paediatric presentations of antituberculosis drugs. The harmonisation of tuberculosis treatment in children is a priority in Spain. A joint action is proposed by a group of Spanish experts in childhood tuberculosis and in the area of Paediatric Pharmacology. To this end, a pTBred-led workgroup of members from five scientific bodies has been created. Drug pharmaceutical compounding in oral suspensions or oral solutions are recommended as follows: isoniazid 50mg/mL, pyrazinamide 100mg/mL, and ethambutol 50mg/mL. Raw materials, period of validity, and storage conditions are specified. Recommendations for the use of fixed-dose combination drugs are also established. If oral solutions/suspensions or fixed-dose combination drugs are not appropriate, the use of crushed tablets is recommended. Adherence to treatment and optimal dosing of antituberculosis drugs are critical in the control and eradication of TB. This multidisciplinary document provides an opportunity to promote the appropriate treatment of paediatric tuberculosis in Spain, and should become a useful tool for paediatricians and pharmacists.
Subject(s)
Antitubercular Agents/administration & dosage , Tuberculosis/drug therapy , Child , Drug Combinations , HumansABSTRACT
PURPOSE: The aim of the study was to evaluate the concentration - in-vitro release relationship for topical semisolid formulations of sodium cromoglycate. Materials / Methods. According to usual pharmaceutical compounding practice, commercially available cosmetic emulsions were used as vehicles for topical semisolid dosage forms containing 0.5, 2, 4 and 10% disodium cromoglycate (CS). The in-vitro release profiles and structural parameters of the resulting formulations was evaluated in a correlated manner, in order to reveal potential differences in the in-vivo performance. RESULTS: Depending on the hydro-lipophilic characteristics of the vehicle and on the quantity of drug dissolved or dispersed, the structure and the release kinetics are distinct. CONCLUSIONS: The results suggested that current lack of an unitary approach for the compounding of semisolid dosage forms of CS, resulting from the lack of widely available, standardized dosage form could be a reasonable explanation for the apparent discrepancy in the reports of clinical outcome after topical administration.