Enrofloxacin is a fluorquinolone exclusively developed for use in veterinary medicine (1980). The kinetics of enrofloxacin are characterized, in general terms, by high bioavailability in most species and rapid absorption after IM, SC or oral administration. However, several studies reported that enrofloxacin showed low bioavailability after oral administration in ruminants. This drug has a broad distribution in the organism, excellent tissue penetration and long serum half-life. Also, enrofloxacin is characterized by a low host toxicity, a broad antibacterial spectrum and high bactericidal activity against major pathogenic bacteria (both Gram-positive and Gram-negative), and intracellular organisms found in diseased animals. The kinetics vary according to the route of administration, formulation, animal species, age, body condition, and physiological status, all of which contribute to differences in drug efficacy. The pharmacokinetic properties of drugs are closely related to their pharmacological efficiency, so it is important to know their behavior in each species that is used. This article reviews the pharmacokinetics of enrofloxacin in several domestic animal species.
In this experimental study we have investigated whether the inclusion of the dietary fiber Plantago ovata husk could be recommended as coadjuvant in treatments with oral hypoglycemic drugs. We evaluated the use of Plantago ovata husk-metformin association in diabetic rabbits by determining its effects on glucose and insulin concentrations. Six groups of 6 rabbits were used. Groups 1 to 3 were fed with standard chow and groups 4 to 6 with chow supplemented with Plantago ovata husk (3.5 mg/kg/day). Two groups (numbers 1 and 4) were used as controls (receiving standard or supplemented chow), two groups (numbers 2 and 5) received metformin orally, and the other two (numbers 3 and 6) were treated orally with metformin and psyllium. Plasma glucose concentrations were lower in groups fed with fiber-supplemented chow whereas insulin levels showed important interindividual variations. Glucose pharmacokinetics parameters showed significant differences in C max and t max in relation to fiber intake. Insulin pharmacokinetics parameters after treatment with oral metformin showed an important increase in C max, AUC, and t max in animals fed with fiber. We conclude that Plantago ovata husk intake can contribute to the oral antihyperglycemic treatment of type 2 diabetes.
RESUMENLa ivermectina es un fármaco antiparasitario muy utilizado en Medicina Veterinaria, dado su espectro de actividad que abarca tanto endo como ectoparásitos, elevada eficacia y amplio margen de seguridad. No obstante, su administración puede dar lugar a efectos tóxicos. La mayoría de ellos derivan de la sobredosificación del compuesto, aunque también se han descrito, a dosis terapéuticas, casos de susceptibilidad extrema a los efectos neurotóxicos del fármaco en determinadas razas o subpoblaciones de animales, así como reacciones anafilácticas por la destrucción masiva de parásitos.Palabras clave: ivermectina, toxicidad, efectos adversos. ABSTRACTThe antiparasitic drug Ivermectin is frequently used in veterinary medicine, due to its broad spectrum of activity (both against endo-and ectoparasites, high efficacy and wide margin of safety. However, its administration can give rise to toxic effects. Most of them come from the overdosage of the compound, although, at therapeutic doses, it also has been described an increased susceptibility to Ivermectin toxicosis in some breeds and subpopulations of animals, as well as severe anaphylactic reactions due to the sudden massive release of parasite toxins.
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