Abstract
The release of potassium chloride incorporated into hydrogenated vegetable oil and hydroxypropyl methylcellulose matrix tablets was studied in vitro. The formulations containing 20% hydrogenated vegetable oil and hydroxypropyl methylcellulose showed a sustained-release profile comparable to that of a standard commercially available sustained-release preparation, containing 8 mEq potassium chloride embedded in a wax material. The formulated and standard sustained-release potassium chloride tablets were compared to a conventional enteric-coated potassium chloride tablet in 10 healthy subjects. Mean recoveries in 24-hr urine potassium levels from four dosage forms (after subtracting normal urine potassium excretion levels) were 76 ± 32% from hydroxypropyl methylcellulose, 95 ± 22% from hydrogenated vegetable oil-incorporated matrix tablets, 91 ± 29% from commercially available sustained-release tablets, and 97 ± 13% from enteric-coated tablets. There was no significant difference (P > 0.05) in the time to reach maximum excretion rates among the three sustained-release tablets. No significant adverse effect was experienced with any of the preparations.
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Şenel, S., Çapan, Y., Dalkara, T. et al. Formulation, Bioavailability, and Pharmacokinetics of Sustained-Release Potassium Chloride Tablets. Pharm Res 8, 1313–1317 (1991). https://doi.org/10.1023/A:1015868232590
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DOI: https://doi.org/10.1023/A:1015868232590