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Year : 1996  |  Volume : 28  |  Issue : 3  |  Page : 185-187

Bioavailability of diclofenac sodium: comparison of rectal suppositories with oral suspension in rabbits

Correspondence Address:
Ramkrishna Sistla

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Source of Support: None, Conflict of Interest: None

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Compressed rectal suppositories which are suitable and stable in tropical climates were formulated using diclofenac sodium, a potent NSAID, in polyethylene glycol 4000 base. These suppositories were evaluated for pharmacokinetic performance in rabbits at the dose of 10 mg/kg and the results were compared with those obtained after oral administration. A computer programme using model independent formulae was used to calculate different pharmacokinetic parameters. There was no difference in pharmacokinetic parameters such as Cmax, AUC0-(, t1/2 and the mean residence time (MRT) between oral and rectal formulations. But tmax was faster in case of oral administration (0.58˝ 0.08 h vs 1.08˝ 0.15 h, P < 0.05) indicating quicker drug absorption from oral suspension. Relative rectal bioavailability was 98.35˝ 3.58% which indicates comparable pharmacokinetic performance of rectal suppositories of diclofenac sodium in rabbits.


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