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We have measured the effects of ephedrine, adrenaline, noradrenaline and isoprenaline on halothane-induced contractures in muscle biopsies from patients potentially susceptible to malignant hyperthermia (MH). At concentrations of 4-24 mmol litre-1, ephedrine induced in vitro contractures in
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l-Ephedrine is an active ingredient in several herbal formulations with a mechanism of action similar to amphetamine and methamphetamine. However, its potential to damage dopaminergic terminals in the caudate/putamen (CPu) has yet to be fully evaluated. The studies here used in vivo brain
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Multiple doses of the dietary supplement L-ephedrine can cause severe hyperthermia and modest dopamine depletions in the rat brain. Since D-amphetamine treatment can result in neurodegeneration, the potential of L-ephedrine to produce similar types of degeneration was investigated. Adult male rats,
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The anaesthetic management for Caesarean delivery of a parturient with a strong family history of malignant hyperthermia (MH) is presented. Before surgery an anaesthetic machine that was in regular use was prepared by replacing all rubber or disposable components and flushing with O2 at 10 L.min-1
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Oxazolidines synthesized from (-) ephedrine have been proposed as potential pro-drugs, but no pharmacological data on these compounds has been yet reported. In this study, four such compounds are tested in rats for ephedrine-like activity using the hyperthermia and anorexia models. The compounds
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1. Five oxazolidines were synthesized by reaction of (-) ephedrine with aliphatic aldehydes. The aldehydes used were formaldehyde, propionaldehyde, butyraldehyde, isobutyraldehyde and trimethylacetaldehye. 2. These five oxazolidines were tested in rats for ephedrine-like pharmacological activity
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Human consumption of ephedrine and caffeine in dietary supplements has been associated with a number of adverse effects including changes in the ECG, myocardial infarction, hyperthermia, and, in rare instances, death. The purpose of this study was to investigate the potential mechanisms associated
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The experiments were conducted in order to examine the mechanism of hyperthermia induced by l-ephedrine in rats. beta-Adrenoceptor agonists have been known to enhance normal body temperature. Therefore, the effect of various beta-adrenoceptor agonists on body temperature in rats was examined to
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Effects of ephedrine, amygdalin, glycyrrhizin, gypsum and their combinations on body temperature and body fluid were studied in rats using the method developed in our previous reports. Ephedrine significantly increased respiratory evaporative water loss and heat loss in response to a marked
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Acute heat loading is encountered in several everyday situations, during physical exercise or work in a hot climate are just 2 examples. Special forms of heat exposure include different types of steam baths and saunas. External heating induces changes in haemodynamics, body fluid volume and blood
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The herbal preparation Ma-Xing-Gan-Shi-Tang (MXGST) is a popular traditional Chinese formulation that has been used for the treatment of coughs and fevers. The potential active components of MXGST are ephedrine, amygdalin, and glycyrrhizic acid. The aim of this study was to develop a validated
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OBJECTIVE
To describe the clinical signs following ingestion of an herbal supplement containing guarana and ma huang in dogs, estimate minimum dose at which clinical signs of toxicosis and death were reported, and evaluate treatment options.
METHODS
Retrospective study.
METHODS
47 dogs with evidence
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In this article, we have examined some pharmacologic principles as they apply to drug use by healthy individuals. With the present emphasis on community activities, we have dealt with the impairment of thermoregulation by athletes and fun runners who may take normal over-the-counter medications for
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We gave propofol anesthesia to a patient with limb-girdle type of progressive muscular dystrophy. A 42 year-old male was to have skin graft for third degree burn. His respiratory function test showed %VC of 73.6% and %FEV1.0 of 107.6%. Arterial blood gas data were within normal ranges. He was
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The case of a 21-year-old male taking over-the-counter pseudoephedrine for weight loss who died suddenly during exercise shortly after inoculation with Japanese encephalitis and phenol-inactivated typhoid vaccines is presented. The patient collapsed in mild weather while exercising 75 minutes after
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