1 Prednisolone plasma levels were measured in seven patients by a competitive protein binding method after administration of prednisolone (20 mg) by mouth as plain or enteric-coated tablets. 2 The mean peak plasma prednisolone concentration after the enteric-coated preparation, 199 ng ml-1, was significantly lower than after the plain tablet, 268 ng ml-1, and occurred later, at 4.69 h compared with 1.72 h. The bioavailability of the two preparations was similar. 3 It is concluded that, although the plasma concentration versus time profiles are different, the absorption of prednisolone from plain and enteric-coated preparations is equal.

Humans↗

PubMed1976

Plasma prednisolone levels after administration of prednisolone-21-phosphate as a retention enema in colitis.

A competitive protein-binding assay was used to measure plasma prednisolone levels after administration of prednisolone-21-phosphate retention enemas to seven patients with colitis. Prednisolone appeared in the plasma of all patients after the enema, and concentrations rose to a peak within three hours. In five of the patients plasma prednisolone levels were also measured after the same dose of prednisolone by mouth. Although in individual patients the plasma levels achieved by enema were often quite different from those achieved by mouth, overall the levels achieved by each mode of administration were of a similar order. These findings suggest that 20 mg prednisolone given by retention enema may well exert a systemic effect.

Adult↗

PubMed1975

Measurement of plasma prednisolone in man.

1. A modification of the competitive protein binding assay for prednisolone described by English, Chakraborty & Marks (1974) is presented. 2. Addition of pg quantities of [3H]-prednisolone following oral dosage with prednisone or prednisolone. 3. Mean plasma half-life and peak plasma concentrations in patients with respiratory disease seen following prednisolone administration agree well with previous studies in healthy volunteers performed by other workers using competitive protein binding and radioimmunoassay techniques. 4. A considerable inter-patient variation in bioavailability after a standard dose of prednisolone (20 mg) was noted.

Administration, Oral↗

PubMed1971

Influence of acclimatization on sweat sodium concentration.

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Acclimatization↗

PubMedDate not supplied

Toxicity and association of polycyanoacrylate nanoparticles with hepatocytes.

The degradation of polybutylcyanoacrylate (PBC) and polyhexylcyanoacrylate (PHC) nanoparticles, together with their association with and toxicity towards isolated hepatocytes, were determined. Nanoparticles were not taken up by rat hepatocytes at a significant level. The LD50S of PBC and PHC nanoparticles towards hepatocytes were 0.4 mg/2 x 10(6) cells and greater than 1 mg/2 x 10(6) cells respectively. This hepatocyte toxicity cannot be attributed solely to the formaldehyde formed during degradation.

Animals↗