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1.
Rev. neuro-psiquiatr. (Impr.) ; 82(4): 298-303, oct.-dic 2019. tab
Article in Spanish | LILACS-Express | LILACS | ID: biblio-1144853

ABSTRACT

El síndrome neuroléptico maligno es una rara y potencialmente fatal reacción adversa medicamentosa, asociada usualmente al uso de antipsicóticos. Tiene por características la presencia de fiebre, rigidez muscular, estado mental alterado y disfunción autonómica. Los hallazgos de laboratorio son inespecíficos, sin embargo, la presencia de leucocitosis y elevación de la creatina fosfoquinasason hallazgos frecuentes. Presentamos el caso de un paciente varón de 51 años, natural de Lima con antecedentes médicos de tuberculosis pulmonar y esquizofrenia que acude a nuestro hospital con un cuadro de psicosis quien, luego de ser tratado con ziprasidona administrada por vía intramuscular, presentó los síntomas característicos de un síndrome neuroléptico maligno. Conocer la clínica y la fisiopatología de este síndrome nos permitirá un mejor abordaje, ya que por su poca frecuencia podría no llegar a plantearse dentro de los diagnósticos diferenciales, lo que resultaría perjudicial para el paciente.


Neuroleptic malignant syndrome is a rare and potentially fatal drug adverse reaction, usually associated with antipsychotics. Signs and symptoms include: fever, muscle rigidity, altered mental status and autonomic dysfunction. Laboratory findings are nonspecific, however the presence of leukocytosis and elevated creatinine phosphokinase are frequent findings. We present the case of a 51-year-old male patient from Lima with a medical history of pulmonary tuberculosis and schizophrenia that comes to our hospital with psychotic symptoms. After being treated with ziprasidone, administered by intramuscular injection presents with typical symptoms of neuroleptic malignant syndrome. Knowing the clinical features and the pathophysiology of this syndrome will allow us to better approach the condition. Due to its infrequent presentation, it may not be considered within the differential diagnosis, which could be harmful to the patient.

2.
Rev. ciênc. farm. básica apl ; 36(4): 497-502, 01/10/2015.
Article in Portuguese | LILACS | ID: biblio-2584

ABSTRACT

O cloridrato de ziprasidona foi físico-quimicamente caracterizado pelas técnicas de Calorimetria Exploratória Diferencial (DSC), Termogravimetria (TG), Espectroscopia no Infravermelho com Transformada de Fourier (FT-IR), Difração de Raios X de Pó (DRX) e Microscopia Eletrônica de Varredura (MEV). O estudo de compatibilidade foi realizado com 5 excipientes farmacêuticos diferentes (amido pré-gelatinizado, estearato de magnésio, celulose microcristalina, manitol e polivinilpirrolidona ­ PVP) . Amostras de misturas binárias fármaco: excipiente 1:1 m/m foram estocadas por 3 meses em câmara de estabilidade (75% ± 5% de umidade relativa e 40 ºC ± 1 ºC), e então analisadas por Cromatografia Líquida de Alta Eficiência (CLAE) para avaliar o efeito de cada excipiente na estabilidade química e, consequentemente, no teor do fármaco, em cada amostra . Os resultados de DRX e FT-IR identificaram a forma polimórfica F, correspondente ao cloridrato de ziprasidona monohidrato. A análise térmica demonstrou que o fármaco apresentou uma perda de massa de 4%, até 100ºC, correspondente à saída de uma molécula de água. A próxima perda de massa ocorreu a partir da temperatura de fusão (297ºC), e o fármaco foi totalmente degradado até 600ºC. Os resultados de CLAE demonstraram que o estearato de magnésio foi o único, entre os 5 excipientes testados, que provocou uma redução significativa de teor do fármaco na amostra (teor encontrado = 77% ± 3%). Dessa forma, o fármaco foi compatível com amido pré-gelatinizado, celulose microcristalina, manitol e PVP; e incompatível com estearato de magnésio nas condições estudadas.


Ziprasidone hydrochloride was fully characterized by Differential Scanning Calorimetry (DSC), Thermogravimetry (TG), Fourier Transform Infrared Spectroscopy (FT-IR), Powder X-ray Diffraction (PXRD) and Scanning Electron Microscopy (SEM). The stability study was carried out with 5 different pharmaceutical excipients (pregelatinized starch, magnesium stearate, microcrystalline cellulose, mannitol, polyvinylpyrrolidone ­ PVP). Binary mixtures of the drug-excipient were prepared in a 1:1(w/w) ratio and stored for 3 months in stability chamber (75% ± 5% of relative humidity and temperature of 40 ºC ± 1 ºC), then these samples were analyzed by High Performance Liquid Chromatography (HPLC) to evaluate the effect of each excipient on chemical stability and, consequently, on amount of drug in each sample. Data obtained by FT-IR and PXRD shown the polymorphic form F, corresponding to monohydrate ziprasidone hydrochloride. The thermal analysis demonstrated a mass loss of 4% until 100ºC, corresponding to a water molecule. The following mass loss occurred from melting temperature (297ºC) to 600ºC, with total sample degradation. The HPLC results shown that, between 5 tested excipients, only magnesium stearate caused significant amount reduction of drug in the sample (amount found = 77% ± 3%). Then, the drug was compatible with pregelatinized starch, microcrystalline cellulose, mannitol and PVP; and incompatible with magnesium stearate, in these work conditions.


Subject(s)
Antipsychotic Agents/analysis , Pharmaceutic Aids/chemistry , Drug Stability
3.
Rev. neuro-psiquiatr. (Impr.) ; 78(3): 176-181, jul.-sept.2015. tab
Article in Spanish | LILACS, LIPECS | ID: lil-781629

ABSTRACT

La distonía aguda por antipsicóticos es un efecto extrapiramidal frecuente con el uso de estos medicamentos y, aunque su prevalencia es menor con el uso de antipsicóticos atípicos, no dejan de suscitarse casos de dichas reacciones adversas. Entre ellas, la distonía laríngea es un problema que requiere tratamiento de urgencia y que incluso acarrea riesgo mortal. Reportamos el caso de una paciente joven de sexo femenino y con diagnóstico de esquizofrenia paranoide, quien se presentó a nuestro servicio de emergencia en agitación psicomotriz y presentó distonía laríngea inducida por uso de haloperidol, en primer lugar, y luego por ziprasidona, ambos administrados por vía intramuscular. Finalmente revisamos la bibliografía respectiva y recomendamos que, en caso de distonía laríngea, se evite el posterior uso de antipsicóticos parenterales por el importante riesgo de recurrencia. Con anterioridad al presente reporte había solamente cuatro casos publicados en la literatura científica sobre distonía laríngea aguda inducida por ziprasidona...


Antipsychotic-induced acute dystonia is a frequent extrapyramidal effect secondary to the use of these drugs and, although its prevalence is lower with the use of atypical antipsychotics, several cases of such adverse reactions still arise. One of these extrapyramidal effects, laryngeal dystonia, is a problem that requires urgent treatment and may even be life-threatening. We here report the case of a young female patient with the diagnosis of paranoid schizophrenia who presented to our emergency room with psychomotor agitation and was treated with parenteral antipsychotics. She presented laryngeal dystonia induced by use of haloperidol, in first time, and then induced by ziprasidone, both drugs intramuscularly administered. We review the relevant literature about this case and we recommend to avoid the subsequent use of parenteral antipsychotics if there is the antecedent of laryngeal dystonia, because of the significant risk of recurrence. Prior to this case report, there was only four cases of acute laryngeal dystonia induced by ziprasidone reported in the scientific literature...


Subject(s)
Humans , Female , Antipsychotic Agents , Drug-Related Side Effects and Adverse Reactions , Haloperidol/adverse effects , Airway Obstruction
4.
Braz. j. pharm. sci ; 47(3): 545-553, July-Sept. 2011. graf, tab
Article in English | LILACS | ID: lil-602671

ABSTRACT

The purpose of this research study was to establish ziprasidone HCl NR 40 mg and trihexyphenidyl HCl SR 4mg in the form of bi-layer sustained release floating tablets. The tablets were prepared using sodium HPMC K4M / HPMC K15M as bio-adhesive polymers and sodium bicarbonate acting as a floating layer. Tablets were evaluated based on different parameters such as thickness, hardness, friability, weight variation, in vitro dissolution studies, content of active ingredient and IR studies. The physico-chemical properties of the finished product complied with the specifications. In vitro release from the formulation was studied as per the USP XXIII dissolution procedure. The formulations gave a normal release effect followed by sustained release for 12 h which indicates bimodal release of ziprasidone HCl from the matrix tablets. The data obtained was fitted to Peppas models. Analysis of n values of the Korsmeyer equation indicated that the drug release involved non-diffusional mechanisms. By the present study, it can be concluded that bi-layer tablets of ziprasidone HCl and trihexyphenidyl HCl will be a useful strategy for extending the metabolism and improving the bioavailability of Ziprasidone HCl and Trihexyphenidyl HCl.


O propósito deste trabalho foi preparar ziprasidona. HCl NR 40 mg e triexifenidila.HCl SR 4 mg na forma de comprimidos efervescentes bicamada de liberação controlada. Os comprimidos foram preparados utilizando HPMC K4M / HPMC K15M sódico como polímero bioadesivo e bicarbonato como camada efervescente. Os comprimidos foram avaliados quanto a diferentes parâmetros, como espessura, dureza, friabilidade, variação de peso, dissolução in vitro, conteúdo do ingrediente ativo e estudos de IV. As propriedades físico-químicas dos produtos finais cumprem as especificações. A liberação in vitro da formulação foi estudada de acordo com o procedimento de dissolução da USP XXIII. As formulações resultaram em liberação normal, seguida por liberação controlada por 12 h, o que indica a liberação bimodal de cloridrato de ziprasidona dos comprimidos matriz. Os dados obtidos se adequaram aos modelos de Peppas. A análise de valores de n da equação de Korsmeyer indicou que a liberação do fármaco envolveu mecanismos não difusionais. Por este estudo, pode-se concluir que os comprimidos bicamada de ziprasidona.HCl e de triexifenidila.HCl serão um bom caminho para estender o metabolismo e para melhorar a biodisponibilidade de ziprasidona.HCl e de triexifenidila.HCl.


Subject(s)
Antipsychotic Agents/analysis , Tablets, Enteric-Coated/therapeutic use , Schizophrenia/drug therapy , Drug Delivery Systems/methods
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