Pharmacokinetics of Total and Unbound Paclitaxel After Administration of Paclitaxel Micellar or Nab-Paclitaxel: An Open, Randomized, Cross-Over, Explorative Study in Breast Cancer Patients.

Introduction: Paclitaxel micellar is a novel formulation of paclitaxel in which retinoic acid derivates solubilize paclitaxel. The aim of the present study was to compare the unbound and total plasma pharmacokinetics of the new formulation with those of nanoparticle albumin-bound (nab)-paclitaxel and to further assess its safety.

Methods: In this open, randomized, cross-over study, 28 female patients with breast cancer were given paclitaxel micellar and nab-paclitaxel as a 1-h intravenous infusion at a dose of 260 mg/m.

Maximum Tolerated Dose and Pharmacokinetics of Paclitaxel Micellar in Patients with Recurrent Malignant Solid Tumours: A Dose-Escalation Study.

Introduction: A water-soluble Cremophor EL-free formulation of paclitaxel, in which retinoic acid derivates solubilize paclitaxel by forming micelles (paclitaxel micellar), was studied for the first time in man to establish the maximum tolerated dose (MTD) and to characterize the pharmacokinetics (PK).

Methods: This was an open-label, one-arm, dose-escalating study in patients with advanced solid malignant tumours, for which no standard therapy was available or had failed. Paclitaxel micellar was given as 1-h intravenous infusion every 21 days for 3 cycles, mainly without premedication.

Differentiating mucosal and hepatic metabolism of budesonide by local pretreatment with increasing doses of ketoconazole in the proximal jejunum.

Many drugs undergo first-pass metabolism both in the gut mucosa and the liver, but little is known about the relative efficiency of these two pathways. The objective of this study was to differentiate between mucosal and hepatic metabolism using budesonide as a probe. After a light breakfast, budesonide, 3mg, was infused locally in the proximal jejunum of eight healthy men on seven occasions, on six occasions after administering the CYP3A4 inhibitor ketoconazole 5 min before in the same jejunal position.

Presystemic elimination of budesonide in man when administered locally at different levels in the gut, with and without local inhibition by ketoconazole.

The CYP3A4 substrate budesonide was used to investigate gut wall first-pass metabolism in jejunum, ileum and colon of eight healthy men. Three milligram budesonide in solution was installed at each location by intubation, with or without immediate prior local administration of 16mg ketoconazole. Simultaneously, deuterium-labelled budesonide (0.

Pharmacokinetics of NXY-059, a nitrone-based free radical trapping agent, in healthy young and elderly subjects.

The tolerability, safety, and pharmacokinetics of NXY-059, a nitrone-based free radical trapping agent under development for the treatment of acute ischemic stroke, were investigated in 2 double-blind, placebo-controlled dose-escalation studies in healthy subjects. In the first study in 6 panels of young male subjects (n = 48, 22-45 years), constant rate infusions lasted 8 hours and ranged from 0.16 to 5.

Effect of NXY-059, a novel neuroprotectant, on the pharmacokinetics of a single dose of digoxin in healthy subjects.

Objective: NXY-059 is a novel free-radical trapping neuroprotectant. Digoxin treatment is common in acute ischaemic stroke, the intended patient population for NXY-059. Since both digoxin and NXY-059 are eliminated primarily renally, with a substantial contribution by active renal secretion, and because digoxin has a narrow therapeutic window, this open, randomised, crossover, two-period study investigated whether NXY-059 affects the pharmacokinetics (PK) of digoxin.

Clinical efficacy and pharmacokinetic profiles of intranasal and oral cetirizine in a repeated allergen challenge model of allergic rhinitis.

Background: Intranasal and oral antihistamines are effective in treating allergic rhinitis. Studies comparing these routes of administration of an antihistamine regarding efficacy and pharmacokinetic profile are lacking.

Objective: To compare topical and oral routes of administration of cetirizine regarding efficacy, plasma exudation, and systemic drug levels in a repeated allergen challenge model of allergic rhinitis.

A convenient method for local drug administration at predefined sites in the entire gastrointestinal tract: experiences from 13 phase I studies.

For local administration of drugs or enzyme inhibitors in the human gut, a small-bore, smooth tube was introduced through the nose, retrieved from the pharynx, equipped with a firm radio-opaque capsule, and swallowed. Peristalsis moves the capsule to the desired location in the gut where it is anchored before administration via the tube. Drug uptake is followed by plasma sampling.

NXY-059 does not significantly interact with furosemide in healthy volunteers.

NXY-059 is a free radical-trapping neuroprotectant that reduces infarct size and preserves brain function in animal models of acute ischemic stroke. Acute ischemic stroke patients receiving NXY-059 may also be exposed to diuretics for treatment of heart failure or hypertension. NXY-059 and furosemide are partly eliminated by active tubular secretion via an organic anion transporter.

Pharmacokinetics and sedative effects in healthy subjects and subjects with impaired liver function after continuous infusion of clomethiazole.

Objective: Clomethiazole is virtually completely eliminated by hepatic metabolism. This study was designed to assess the impact of liver impairment on its elimination and sedative effects.

Methods: Eight patients with mild liver impairment (Child-Pugh grade A), eight patients with moderate/severe liver impairment (Child-Pugh grade B/C) and eight healthy subjects of similar age were given 68 mg/kg clomethiazole edisilate according to a 24-h infusion scheme aimed at producing minimum sedation as it was intended for clinical use in patients with stroke.

Pharmacokinetics in renally impaired subjects of NXY-059, a nitrone-based, free-radical trapping agent developed for the treatment of acute stroke.

Objective: NXY-059 is a nitrone-based, free-radical trapping agent being developed for the treatment of acute ischaemic stroke. Elimination of NXY-059 is primarily renal. The objective of the study was to investigate the pharmacokinetics of NXY-059 in subjects with renal impairment.