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Samuel Ghasi*, Chioli P. Chijioke and Raphael Anakwue
Abstract: Piperazine citrate produced a dose- dependent decrease in the blood pressure of the anaesthetized cat. Both 15 mg and 30 mg/kg piperazine showed average significant reduction in blood pressure of 29.8 ± 1.65 and 78.3 ± 3.18 mm Hg respectively. The effect produced in each case was transient and returned to baseline value within 2 min. The reduction in blood pressure caused by piperazine 30 mg/kg was statistically significant compared to the average due to piperazine 15 mg/kg (P < 0.0001). The maximum falls over the baseline blood pressure were also determined to be 34 and 82 mm Hg respectively. Adrenaline 5 mg increased the blood pressure of the cat by 68 mmHg and this effect was antagonized by equipotent doses of piperazine, nifedipine and propranolol to varying degrees. The antagonism produced by equipotent doses of piperazine (15 mg/kg) or nifedipine (200 mg/kg) to blood pressure elevation by adrenaline was quite small (8.8%), compared to propranolol (10mg) which antagonized the vasopressive action by as much as 26.5% (68 - 50 mmHg). Piperazine although severely reducing the blood pressure when given intravenously to the anaesthetized cat as shown in this study, may not be an effective antihypertensive agent as its hypotensive effect is always very transient. This would rather be seen as an untoward effect and in any event that may demand that piperazine be given intravenously, the patients should be warned of hypotension and dizziness as possible adverse effects.[...] Read More.
Keywords: Piperazine citrate, anaesthetized cat, blood pressure.
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A. M. Musa*, A. B. Aliyu, A. H. Yaro, M. G. Magaji, H. S. Hassan and M. I. Abdullahi
Abstract: The methanol extract of the aerial parts of Anisopus mannii was evaluated for its analgesic and anti-inflammatory activities. The analgesic effect was studied using acetic acid-induced abdominal constriction test in mice, while the anti-inflammatory effect was investigated using carrageenan induced paw oedema in rats. The results of the study showed that the extract (40 mg/Kg) exhibited significant (P < 0.01) analgesic effect. It also exhibited significant (P < 0.01) anti-inflammatory effect at a dose of 20 mg/kg. Phytochemical screening of the extract revealed the presence of alkaloids, flavonoids, saponins, steroids and tannins. The extract was found to have an intraperitoneal LD50 of 282.8 mg/kg in mice. The results showed that the extract contains some pharmacologically active principles and lend pharmacological credence to the ethnomedical use of the plant in the management of pain and inflammatory conditions.[...] Read More.
Keywords: Anisopus mannii, phytochemical screening, analgesic activity, anti-inflammatory activity, toxicity.
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E. A. Adewusi and A. J. Afolayan*
Abstract: Pelargonium reniforme Curtis is an herb used for the treatment of various human and animal diseases especially in the Eastern Cape of South Africa. The effects of the oral administration of aqueous extract of the plant roots at 100, 200 and 400 mg/kg body weight for 21 days on some haematological and biochemical parameters in male Wistar rats were investigated. Oral treatments with this extract did not cause any significant change in the white blood cell count, mean corpuscular volume, mean corpuscular haemoglobin, mean corpuscular haemoglobin concentration, neutrophils, monocytes, large unsustained cells, basophils, total and conjugated bilirubin. Also, the extract did not affect the level of albumin, gamma glutamyl transferase, alanine aminotransaminase, aspartate aminotransaminase, cholesterol, high density lipoprotein cholesterol and the organ body-weight ratio of the animals. The levels of potassium, urea, calcium and magnesium were also not affected by the extract. However, the red blood cell count, haemoglobin, platelets, lymphocytes, total proteins, globulin and sodium levels were increased significantly while the levels of alkaline phosphatase, chloride and uric acid were reduced significantly by the extract. In addition, the levels of packed cell volume, red cell distribution width, eosinophils, triglycerides, creatinine and inorganic phosphorus were altered at specific doses. The available results of this study suggest that the aqueous root extract of P. reniforme is not toxic at the doses used in this study and may be safe for medicinal uses.[...] Read More.
Keywords: Pelargonium reniforme, haematological parameters, biochemical parameters.
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U. Kulkarni*, K. Dalvi, V. V. Moghe and Y. A. Deshmukh
Abstract: Increasing health care cost is a major concern in the developing world and has increased the individual economical burden for a common man. Patients are affected by the high pricing of drugs and though the symptoms improve, the poor patient’s compliance sets in if the regimen is heavy on his/her pocket. Therefore, the concepts of pharmacoeconomics are essential for physicians to prescribe individualized drug therapy based on essential drug concept, STEP and R.U.D. criteria, with minimal costs to improve the cost- effectiveness of the drug therapy. Medical education is not purely technical in knowing about diseases and their treatment but also involves understanding socio-economic issues. Consumption decisions in health care are taken by the provider that is, the physician and not by the consumer – patient and these are driven by many factors including pharmaceuticals. Hence apart from professional, moral and ethical obligations as care providers, it is imperative to deliver quality care cost effectively. Pharmacoeconomics, a branch of health care economics offers important guidance for the management of limited health care resources and medical practice. The purpose of this article is to provide an introduction of pharmacoeconomics, its various methods of evaluations such as cost minimization analysis (CMA), cost benefit analysis (CBA), cost utility analysis (CUA), cost effectiveness analysis (CEA) and guidelines to delivering quality care cost effectively and also throw light on the limitations of pharmacoeconomics.[...] Read More.
Keywords: Pharmacoeconomics, cost minimization analysis (CMA), cost benefit analysis (CBA), cost utility analysis (CUA), cost effectiveness analysis (CEA).
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G. O. Alade, M. A. Akanmu*, E. M. Obuotor, S. A. Osasan and O. R. Omobuwajo
Abstract: In this study, the acute and subacute toxicity of Bauhinia monandra methanolic leaf extract were investigated in rats. Acute administration of the extract up to a dose of 8 g/kg body weight to the animals elicited no deaths or treatment related signs of toxicity. Oral subacute administration of the extract (2.0 and 4.0 g/kg body weight) did not show any macroscopic changes in the key organs investigated in the rats. Histopathological examination revealed no significant adverse effects on the liver, spleen, testes and kidneys except for focal expansion of the interstitial stroma and lymphoid follicles in the lungs. Biochemical investigations revealed no significant (p>0.05) alterations in the total cholesterol, total protein and lactate dehydrogenase (LDH) activity in the serum. However, there was a significant (p[...] Read More.
Keywords: Toxicity, Bauhinia monandra, rat, acute, subacute.
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Faizah M. Faizul, Norhaniza Aminudin, Habsah A. Kadir and Saad Tayyab*
Abstract: Bilirubin (BR) lowering potential of Orthosiphon stamineus (OS) aqueous extract was evaluated in temporarily jaundiced adult rats. Treatment of these rats with OS aqueous extract for three days reduced the BR level significantly to the normal value. Whereas smaller dose (50 mg/kg body weight) resulted in the reduction in BR level from 2.53 ± 0.16 to 1.12 ± 0.17 mg/dL, higher doses of 500 and 1250 mg/kg body weight were found to be more effective in reducing the BR level from 2.44 ± 0.12 to 0.52 ± 0.12 mg/dL and from 2.67 ± 0.29 to 0.32 ± 0.21 mg/dL, respectively. Therefore, OS aqueous extract can be used to reduce BR concentration to a normal level in jaundiced subjects.[...] Read More.
Keywords: Orthosiphon stamineus, Misai Kuching, hyperbilirubinemia, jaundice, bilirubin.
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A.  Y. Tijani, S. E. Okhale , T. A. Salawu*, H. O.Onigbanjo, L. A Obianodo, J. A Akingbasote, O. A. Salawu, J. I. Okogun, F. O. Kunle and M. Emeje
Abstract: Stem bark of Parkia biglobosa (Jacq.) R. Br. Ex G. Don (Fabaceae) is used in African traditional medicine for management of diarrhoea- related disorders. The anti-diarrhoeal and anti-microbial activities of the aqueous stem bark extract of P. biglobosa and its fractions designated PF1-PF4 were investigated in mice and against selected diarrhoea-causing micro-organisms. The oral median lethal dose (LD50) of the extract in mice was estimated to be greater than 5000 mg/kg B.W. The extract and its column chromatographic fraction F3 significantly (p < 0.05) and dose-dependently reduced frequency of stooling in castor- oil-induced diarrhoea, castor-oil-induced intestinal fluid accumulation and intestinal transit. The crude extract as well as fractions F3 and F4 strongly inhibited growth of selected micro-organisms. The study showed that the aqueous extract possess both anti-diarrhoeal and anti-microbial activities. The anti-diarrhoeal action may be linked partly to direct inhibitory effect of the extract on the propulsive movement of the gastrointestinal tract smooth muscle, and the anti-microbial effect on the diarrhoea-causing pathogenic organisms.[...] Read More.
Keywords: Antidiarrhoeal, antimicrobial, Parkia biglobosa, fractions, castor oil.
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Mahasen A. Radwan*, Iman Y. Zaghloul and Nayira A. Abd Elbaky
Abstract: An accurate, sensitive and simple high-performance liquid chromatography (HPLC) assay with UV detection has been developed and validated for the simultaneous determination of etoricoxib and its internal standard (IS) flurbiprofen in plasma has been developed. After plasma samples clean up by protein precipitation, followed by solvent evaporation and reconstitution with the mobile phase, an aliquot of the resulted solution were injected into the chromatograph. Peaks were eluted from a Novapak-C8 column using a mobile phase consisting of acetic acid: triethylamine: acetonitrile: water (0.02: 0.01: 41: 59.97, v/v), pH 4.0 at flow rate of 1 ml/min. The detection wavelength was 245 nm with a limit of detection of 50 ng/ml, with a coefficient of variation of 9.8%. Small volumes of plasma were required (200 µL) for etoricoxib determination. The run time was 10 min with etoricoxib and IS eluted in 3.8 and 7.2 min, respectively. The standard curve for the drug was linear in the range of 100 - 5,000 ng/ml for etoricoxib with correlation coefficient > 0.997. This method has been fully validated and shown to be specific, accurate and precise. The assay was selective, where the drug peak was well resolved with no interference from different drugs which could be given concomitantly. The extraction procedure was simple and rapid producing good recovery and a clean baseline, and providing excellent resolution and peak shape for all analytes. The assay was applied to determine the pharmacokinetics of etoricoxib in rats after 15 mg/kg oral dose. Etoricoxib plasma concentrations time profile follows two-compartmental open model with fast distribution and slow elimination phases. This assay is being utilized in determining etoricoxib pharmacokinetics in animals to monitor its interactions with other drugs or food supplements in our laboratory.[...] Read More.
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A. A. Aliero* and S. H. Wara
Abstract: Leptadenia hastata (Pers.) Decne is a wild plant used as vegetable by many African populations and medicine due to its nutritive and therapeutic properties for the treatment of wounds and stomach upset in children. Acetone, methanol and aqueous extracts from its leaves were investigated against five selected bacterial species and two fungal species. Aqueous extract markedly inhibited the growth of Salmonella paratyphi and Escherichia coli at 30 mg/ml and Pseudomonas aeruginosa at 60 mg/ml. The activity exhibited by the methanol extract was generally low and acetone extract did not show any activity against the tested organisms. The result of antimycotic assay showed that methanol extract suppressed the growth of Fusarium oxysporum and Aspergillus niger at 80 mg/ml with inhibition percentages ranging from 58.89 to 73.30%. The activity of acetone extract was low with 40 and 50% inhibition on the growth of A. niger and F. oxysporum respectively. The result obtained in this study has provided a scientific support for the claimed ethnomedical uses of aqueous extracts of L. hastata in the treatment of bacterial diseases and suggest the potential of methanol extract as a source of antifungal agent. Keywords: Leptadenia hastata, antibacterial, antifungal, wild vegetable, ethnomedicine.[...] Read More.
Keywords: Leptadenia hastata, antibacterial, antifungal, wild vegetable, ethnomedicine.
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Rajinder Singh Gujral*, Sk Manirul Haque and Sanjeev Kumar
Abstract: A simple isocratic reversed phase HPLC method was developed and validated for the analysis of pregabalin in bulk, pharmaceutical formulations and human urine samples, the separation was accomplished on a C18 5 µm ODS hypersil column (250 mm × 4.6 mm) using a methanol acetonitrile - 0.02 M di - potassium hydrogen orthophosphate (K 2HPO 4) (pH - 7.00) (3: 1: 16, v/v/v) mobile phase. The compound eluted isocratically at a flow rate of 1.0 ml /min. The UV detector was set at 210 nm for the detection of pregabalin. The method was linear over the range of 0.75 - 6.00 µg/ml. The method was validated with respect to accuracy, precision, linearity, ruggedness, limit of detection and limit of quantitation. Robustness testing was also conducted to evaluate the effect of minor changes to the chromatographic system and to establish appropriate system suitability parameters. This method was used successfully for the quality assessment of 5 pregabalin drug products and human urine samples with good precision and accuracy.[...] Read More.
Keywords: Pregabalin, isocratic system, validation, high performance liquid chromatography, pharmaceutical formulations, human urine samples.
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