The aim of this study was to investigate the prevalence of Mg deficiency and effect of aminophylline infusion on urine magnesium concentration after magnesium loading test (MLT). To determine serum Mg, venous blood specimens were obtained just before the first MLT. Two MLTs were performed. The first one was done before starting aminophylline infusion and the 2nd one was done du...

The aim of this study was to evaluate the effects of H(1) (antazoline and astemizole) or H(2) (cimetidine and famotidine) histamine receptor antagonists on the clonic phase, tonic seizures and morality of mice challenged with aminophylline to induce convulsions in mice. Moreover, the total plasma and brain concentrations of theophylline were evaluated. Astemizole (1 mg/kg) did not affect the th...

A study was designed to investigate the possibility that changes in ventral medullary extracellular fluid carbon dioxide tension (PCO2) and hydrogen ion (H+) concentration mediate the ventilatory stimulation induced by systemic administration of aminophylline. Six cats with peripheral chemodenervation (bilateral carotid sinus nerve and vagal neurotomy) were studied while anaesthetised with chlo...

The concept that hypoxia elicits a drop in body temperature (T(b)) in a wide variety of animals is not new, but the mechanisms remain unclear. We tested the hypothesis that adenosine mediates hypoxia-induced hypothermia in toads. Measurements of selected T(b) were performed using a thermal gradient. Animals were injected (into the lymph sac or intracerebroventricularly) with aminophylline (an a...

Theophylline-associated convulsions have been observed most frequently in children with fever, but the mechanism is not fully understood. In this study, we investigated the basic mechanism of aminophylline [theophylline-2-ethylenediamine]-induced convulsions and the effects of Brewer's yeast-induced pyrexia in mice. Diazepam (5-10mg/kg, i.p.), a benzodiazepine receptor agonist, significantly pr...

AMINOPHYLLINE (theophylline ethylenediamine) has been used traditionally in the treatment of bronchospasm associated with asthma, obstructive bronchitis, and emphysema, and its effect on reducing airway obstruction has been clearly shown.' The hemodynamic effects of this agent, however, have not been fully explored. Aminophylline has been shown to reduce the pulmonary artery pressure in patient...

Heart rate, blood pressure, pulsus paradoxus, and cardiac output measured by means of transthoracic electrical impedance cardiography have been recorded in 29 children mean age 10 years +/- 2 SD during status asthmaticus. Changes were recorded over the first two hours of treatment during which all patients received oxygen, intravenous fluid, and hydrocortisone, and were randomly assigned to rec...

Twenty two preterm infants were prospectively evaluated to assess the need for dose adjustment when converting enteral and parenteral routes of methylxanthine administration. Serum theophylline concentrations remained unchanged in 18 infants after conversion from intravenous aminophylline to theophylline by mouth with dose reduction, as is currently recommended. Intravenous aminophylline and th...