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  • 1
    ISSN: 1432-1041
    Keywords: hypertension ; nifedipine ; beta-adrenoceptor blockade ; long-term treatment ; adverse effects ; propranolol ; timolol ; metoprolol
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The antihypertensive effect of nifedipine during long-term therapy was investigated in 5 patients receiving nifedipine as the sole drug and in 10 patients who had nifedipine in combination with a beta-adrenoceptor blocking drug. Nifedipine monotherapy was problematic because of side-effects and development of resistance to therapy after a few months. In patients who received the combined therapy significant and stable blood pressure reductions were maintained during the whole observation period (12–33 months). However, the occurrence of peripheral oedema in 4 of the patients necessitated the addition of a thiazide diuretic. It is concluded that nifedipine is not a first choice drug for the long-term treatment of arterial hypertension. When given in addition to a beta-blocker it is well tolerated and powerful but fluid retention may occur and if not counteracted by a diuretic it will limit the antihypertensive potential of the drug.
    Type of Medium: Electronic Resource
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  • 2
    Electronic Resource
    Electronic Resource
    Springer
    European journal of clinical pharmacology 24 (1983), S. 679-682 
    ISSN: 1432-1041
    Keywords: acetylsalicylic acid ; salicylic acid ; platelets ; pharmacokinetics ; sex difference ; platelet aggregation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary The systemic availability of acetylsalicylic acid (ASA) after oral ingestion of 1 g in an effervescent formulation was 16.3±2.0% and 16.9±3.2% of the ingested dose in normal women and men, respectively. The average plasma half-life of ASA in each sex was also identical at 18.5±1.4 and 18.1±1.2 min, respectively. The inhibitory effect of ASA on collagen-induced platelet aggregation in vitro on blood from both sexes was studied. The IC50 was 23.9±2.9 µg/ml in females and 22.5±2.7 µg/ml in males, which did not differ significantly. The inhibition by salicylic acid (SA) of the antiaggregatory effect of ASA was similar in both sexes with increases in IC50 to 33.5±5.1 µg/ml in females (p〈0.02) and to 29.5±3.8 µg/ml in males (p〈0.05). It is concluded that the observed sex-difference in the antithrombotic effect of ASA cannot be explained neither by differences between females and males in the pharmacokinetic properties of ASA after oral ingestion, nor by differences in the in vitro effect of ASA on the platelet aggregation induced by collagen.
    Type of Medium: Electronic Resource
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  • 3
    ISSN: 1432-1041
    Keywords: bepridil ; diabetes mellitus ; Type I ; Type II ; insulin secretion ; C-peptide ; adverse effects ; diabetic control
    Source: Springer Online Journal Archives 1860-2000
    Topics: Chemistry and Pharmacology , Medicine
    Notes: Summary In a double-blind cross-over study bepridil 900 mg followed by 300 mg daily for 11 days was given to 37 insulin (Type I) or non-insulin (Type II)-dependent diabetic patients. It did not modify the metabolic control of the patients as levels of glucose in blood and urine, doses of insulin and oral hypoglycaemic drugs, energy intake, and the number of hypoglycaemic attacks during therapy were unchanged. The serum concentration of C-peptide was not modified in either type of diabetic patient, and serum insulin in the Type I but not in the Type II patients was slightly higher during active drug treatment. No adverse organotoxic or arrhythmogenic effects or changes in possible atherogenic lipid fractions in serum could be demonstrated during bepridil therapy.
    Type of Medium: Electronic Resource
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  • 4
    ISSN: 1434-0879
    Keywords: Unilateral complete ureteric obstruction ; Renal blood flow ; Preglomerular vasoconstriction ; Thromboxane inhibition
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Summary In 8 female pigs complete unilateral ureteral obstruction was investigated over a 4 weeks period. The pigs were monitored with intrapelvic pressure measurements and by 131-I-hippuran scintigraphy twice a week; one group without and one with TxA2 blocking, UK-38,485 [3-(1H-imidazol-1-yl-methyl)-2methyl-1H-indol-1-propanoic acid], which is a well-known selective thromboxane synthetase inhibitor. During the course of obstruction there was an ipsilateral linear reduction of split function to background level and a net reduction in total hippuran clearance in both groups. On the obstructed side there was a linear reduction of hippuran clearance from 116±26 ml/min to 11±3 ml/min during the first 2 weeks of obstruction. The TxA2 synthetase inhibitor, 5 mg/kg reduced se-TxB2 to almost zero for at least one hour after i.v. administration. One week after obstruction the pelvic pressure was 45±5 cm H2O administration of the TxA2 synthetase inhibitor. The pelvic pressure remained elevated throughout the period of observation. The study confirmed earlier work which showed that total ureteral obstruction caused complete cessation of kidney function within a few weeks, but contradicts previous studies because there was no increase in renal blood flow after thromboxane blockade. These differences may be explained by several mechanisms. The continuing increase in pelvic pressure suggested that it was not only a preglomerular vasoconstriction which was responsible for the renal flow reduction, but that there was also a postglomerular vasoconstriction.
    Type of Medium: Electronic Resource
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  • 5
    Electronic Resource
    Electronic Resource
    Springer
    International urogynecology journal 4 (1993), S. 106-110 
    ISSN: 1433-3023
    Keywords: Alpha-1-adrenoceptor blocking agent ; Clinical evaluation ; Prazosin ; Urodynamic investigations
    Source: Springer Online Journal Archives 1860-2000
    Topics: Medicine
    Notes: Abstract Prazosin has a selective alpha-1-adrenoceptor blocking effect and, as a result, reduces maximal urethral pressure. It decreases detrusor contractility and excitability in patients with detrusor hyperreflexia. The clinical effect of prazosin even in a high-dose regimen is only slight, but clinical investigations are at the moment few. Prazosin is well tolerated, with dizziness as the most commonly reported side effect. With this background, further studies should be performed to document a possible clinical effect in subgroups.
    Type of Medium: Electronic Resource
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