Filariae are tissue-invasive nematodes that cause diseases such as elephantiasis and river blindness. The goal of this study was to characterize the role of histamine during Litomosoides sigmodontis infection of BALB/c mice, a murine model of filariasis. Time course studies demonstrated that while expression of histidine decarboxylase mRNA increases throughout 12 weeks of infection, serum level...

The overall purpose of this study was to investigate Neurostan Saint John’s Wort (SJW) on the disposition of fexofinadine in the isolated perfused rat liver. SpragueDawley (SD) rats (n = 16) randomized into 3 groups, including: control, low dose (Hypericum, one type of neutostan) and high dose group. Each animal among these groups was pre-treated with either vehicle (ethanol in Milli Q water at...

BACKGROUND A recurring epidemic of asthma exacerbations in children occurs annually in September in North America when school resumes after summer vacation. OBJECTIVE Our goal was to determine whether montelukast, added to usual asthma therapy, would reduce days with worse asthma symptoms and unscheduled physician visits of children during the September epidemic. PATIENTS AND METHODS A tota...

BACKGROUND The aim of our study was to investigate effects of 6-week pretreatment of seasonal allergic rhinitis (AR) with cetirizine, and montelukast, alone and in combination. Antihistamine/antileukotriene treatment is effective in AR. Antihistamines may prevent AR symptoms while prophylactic activity of antileukotrienes remains unclear. METHODS Sixty AR patients, aged 18-35 years, were rand...

INTRODUCTION One of the most common complaints in patients with end-stage renal disease (ESRD) is uremic pruritus. In the recent years, many drugs have been proposed for its treatment which have had paradoxical outcomes. We studied the antipruritus effect of montelukast sodium, a leukotriene receptor antagonist, in patients on hemodialysis. MATERIALS AND METHODS The study was conducted as ran...

AIMS Compare the effects of montelukast or dexamethasone in distal lung parenchyma and airway walls of guinea pigs (GP) with chronic allergic inflammation. METHODS GP have inhaled ovalbumin (OVA group-2x/week/4weeks). After the 4th inhalation, GP were treated with montelukast or dexamethasone. After 72 hours of the 7th inhalation, GP were anesthetised, and lungs were removed and submitted to ...

PURPOSE As H1 and H3 receptors' roles has been defined in peripheral pains in some papers and because histamine is known for its role in inflammatory responses; this study investigated the possible analgesic and anti-inflammatory effects of ketotifen and fexofenadine as relatively safe long acting anti histamines in both chronic chemical pain and acute inflammation in rats. METHODS In this st...

AIM A randomized, two-way, crossover, bioequivalence study was conducted in 25 fasting, healthy, male volunteers to compare two brands of fexofenadine 180 mg tablets, FEXOFENADINE 180 mg Film Tablet (Drogsan A.S., Ankara, Turkey) as test and Telfast 180 mg Tablet (Aventis Pharma, Frankfurt am Main, Germany) as a reference product. METHOD One tablet of either formulation was administered after...

A novel stability-indicating gradient RP-UPLC method was developed for the quantitative determination of process related impurities and forced degradation products of fexofenadine HCl in pharmaceutical formulations. The method was developed by using Waters Aquity BEH C18 (100 mm x 2.1 mm) 1.7 μm column with mobile phase containing a gradient mixture of solvent A (0.05% triethyl amine, pH adjust...

Fexofenadine, a nonsedating antihistamine, does not undergo significant metabolic biotransformation. Accordingly, it was hypothesized that uptake and efflux transporters could be importantly involved in the drug's disposition. Utilizing a recombinant vaccinia expression system, members of the organic anion transporting polypeptide family, such as the human organic anion transporting polypeptide...