Calcium entry blockers such as felodipine induce natriuresis without a parallel rise of potassium excretion. Previous studies with exogenous aldosterone and felodipine have suggested that the absence of kaliuresis might be explained by a felodipine-induced inhibition of aldosterone release. The natriuresis with calcium entry blockers could not be attributed to a similar mechanism but might be d...

This multicenter, placebo-controlled, double-blind trial of factorial design evaluated the safety and efficacy of combination treatment with the angiotensin-converting enzyme inhibitor, enalapril, and the vascular selective calcium antagonist felodipine extended release (ER) in patients with essential hypertension. After a 4-week, single-blind placebo baseline period, 707 patients with sitting ...

This experiment researched and constructed a complex with good fluorescence properties, which can be used to detect the content of felodipine. It provides new reliable method for determination The actual sample felodipine was successfully tested, test result compared labeled content. proved that determined in this basically consistent standard sample, reproducibility good. Therefore, determine ...

In a crossover design, control of blood pressure by extended release felodipine was compared with control by prolonged action nifedipine in 21 children with renal hypertension. Compliance with once daily felodipine was higher than with nifedipine, at 95.6 (SEM 2.7)% v 78.9 (6.0)% (p = 0.02). Mean diastolic blood pressure was lower during the day with felodipine than with nifedipine, at 77.6 (2....

The effects of a calcium antagonist of the dihydropyridine type, felodipine, on the cerebral circulation were studied in comparison with those of nicardipine in pancuronium-bromide immobilized unanesthetized dogs. Felodipine (0.3-10 micrograms/kg, i.v.) and nicardipine (0.3-10 micrograms/kg, i.v.) produced a dose-related decrease in mean blood pressure with almost equal potencies. However, at a...

Grapefruit can augment oral medication bioavailability through irreversible (mechanism-based) inhibition of intestinal CYP3A4. Supplementary data from our recent coffee-drug interaction clinical study showed some subjects had higher area under the plasma drug concentration - time curve (AUC) and plasma peak drug concentration (Cmax) of the CYP3A4 probe felodipine compared to aqueous control. It...

BACKGROUND After EDTA-induced hypocalcaemia, healthy volunteers treated with diltiazem display more severe hyperparathyroidism than subjects on felodipine studied under identical conditions. Therefore patients with end-stage renal disease (ESRD) and severe secondary hyperparathyroidism might be particularly sensitive to this side-effect. METHODS To test this hypothesis, seven patients with ES...

A 10 min ligation of the left anterior descending coronary artery in anaesthetized pigs resulted in ventricular fibrillation (VF) in 70% of control and propranolol-treated animals. Felodipine (10 nmol kg-1) not only reduced ventricular ectopic activity by 90%, but also completely abolished VF. When a second occlusion was applied after 20 min of reperfusion, felodipine was less effective against...

OBJECTIVES Our objectives were to evaluate the contribution of bergamottin to the grapefruit juice-felodipine interaction and to characterize bergamottin disposition. METHODS In this study 250 mL grapefruit juice; 2-, 6-, or 12-mg capsules of bergamottin plus water; or water was administered with 5 mg extended-release felodipine to 11 volunteers in a partially randomized, 5-way crossover stud...

To determine the renoprotective effects of a calcium antagonist (felodipine) and an angiotensin-converting enzyme (ACE) inhibitor (enalapril), alone or in combination, 10 groups of 19-week-old spontaneously hypertensive rats (SHR) (with or without N(G)-nitro-L-arginine methyl ester [L-NAME]) were studied using renal micropuncture techniques. Group 1 (control), group 2 (felodipine, 30 mg x kg(-1...