Trial reportEuropean journal of clinical pharmacology1994
Influence of input rates on (+/-)-isradipine haemodynamics and concentration-effect relationship in healthy volunteers.
Trial report in European journal of clinical pharmacology, 1994. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
9 citing papers in PubMed, 14 citations in OpenAlex.
- Novel protocol for multiple-dose oral administration of the L-type CaChannels (Austin, Tex.) · 2024Article
- The human channel gating-modifying A749G CACNA1D (Cav1.3) variant induces a neurodevelopmental syndrome-like phenotype in mice.JCI insight · 2023Article
- L-type calcium channel antagonist isradipine age-dependently decreases plaque associated dystrophic neurites in 5XFAD mouse model.Neuropharmacology · 2023Article
- Theoretical Examination Seeking Tangible Physical Meanings of Slopes and Intercepts of Plasma Concentration-Time Relationships in Minimal Physiologically Based Pharmacokinetic Models.The AAPS journal · 2023Article
- Determinants of Biological Half-Lives and Terminal Slopes in Physiologically Based Pharmacokinetic Systems: Assessment of Limiting Conditions.The AAPS journal · 2022Article
- Post-Translational Modification of Cav1.2 and its Role in Neurodegenerative Diseases.Frontiers in pharmacology · 2021Review
- Understanding the hysteresis loop conundrum in pharmacokinetic/pharmacodynamic relationships.Journal of pharmacy & pharmaceutical sciences : a publication of the Canadian Society for Pharmaceutical Sciences, Societe canadienne des sciences pharmaceutiques · 2014Article
- Review
- Are we doing too many animal biodisposition investigations before phase I studies in man? A re-evaluation of the timing and extent of ADME studies.European journal of drug metabolism and pharmacokineticsArticle
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
3 authors at 1 institution in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
Since the magnitude of the response to a drug may depend upon the drug input rate, the concentration-effect relationship of the new dihydropyridine (+/-)-isradipine was investigated using different administration modalities. Ten normotensive healthy volunteers were given, double-blind and in a crossover fashion, isradipine as a 1 mg iv infusion, 5 mg oral solution, 5 mg standard tablet, 10 mg slow release formulation, and a placebo. Blood pressure, heart rate, and plasma isradipine concentrations were recorded for 24 h. The maximal fall in diastolic blood pressure was similar after the infusion (-11.40 mmHg), the oral solution (-15.20 mmHg), and the standard tablet (-12.50 mmHg). In healthy volunteers the slow release form had no significant effect on blood pressure. The concentration-effect plots showed an increasing slope in the order infusion, solution, and table, and anticlockwise hysteresis. This was partly due to marked heart rate counter-regulation, the corresponding mean maximal heart rate increases being 24, 19, and 17 beats.min-1. The pronounced counter-regulation of the heart rate implies that a slow isradipine input rate would be more effective in decreasing blood pressure.
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Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.