Compression-Coated Tablet for Colon Targeting: Impact of Coating and Core Materials on Drug Release

Journal Title: AAPS PharmSciTech - Year 2016, Vol 17, Issue 2

Abstract

This work was envisaged to develop compression-coated tablets using a blend of Ca+2 ion cross-linked carboxymethyl xanthan gum (CMXG) and sodium alginate (SAL) for delayed release of immediate pulse release tablets of prednisolone (PDL) in the colon without the need of colonic bacterial intervention for degradation of the polysaccharide coat. The core tablets containing PDL and other compatible excipients were prepared by direct compression method and subsequently compression coated with different ratios of CMXG and SAL. Long T lag, the time required to restrict the drug release below 10%, and short T rap, the time required for immediate release following the T lag, were considered as suitable release parameters for evaluation of colon targeting of PDL tablets. Among the various compression coats, a blend of CMXG and SAL in a ratio of 1.5:3.5 provided T lag of 5.12 ± 0.09 h and T rap of 6.50 ± 0.05 h. The increase in microcrystalline cellulose (MCC) and crospovidone (CP) in the core tablets did not change T lag significantly although decreased the T rap marginally. Inclusion of an osmogen in the core tablets decreased the T lag to 4.05 ± 0.08 h and T rap to 3.56 ± 0.06 h. The increase in coat weight to 225 mg provided a reasonably long T lag (6.06 ± 0.09 h) and short T rap (4.36 ± 0.20 h). Drug release from most of the formulations followed the Hixson-Crowell equation and sigmoidal pattern as confirmed by the Weibull equation. In conclusion, tablets, compression coated with CMXG and SAL in a ratio of 1.5:3.5 and having 225-mg coat weight, were apparently found suitable for colon targeting.

Authors and Affiliations

Siddhartha Maity, Biswanath Sa

Keywords

Related Articles

Novel Simvastatin Inhalation Formulation and Characterisation

Simvastatin (SV), a drug of the statin class currently used orally as an anti-cholesterolemic via the inhibition of the 3-hydroxy-3-methyl-glutaryl-Coenzyme A (HMG-CoA) reductase, has been found not only to reduce choles...

Formulation, Characterisation and Stabilisation of Buccal Films for Paediatric Drug Delivery of Omeprazole

This study aimed to develop films for potential delivery of omeprazole (OME) via the buccal mucosa of paediatric patients. Films were prepared using hydroxypropylmethylcellulose (HPMC), methylcellulose (MC), sodium algin...

QbD-Enabled Development of Novel Stimuli-Responsive Gastroretentive Systems of Acyclovir for Improved Patient Compliance and Biopharmaceutical Performance

The online version of this article (doi:10.1208/s12249-015-0367-0) contains supplementary material, which is available to authorized users.

Enhancement of Oral Bioavailability of Curcumin by a Novel Solid Dispersion System

The objective of this study was to improve the solubility and bioavailability of curcumin by a new curcumin dripping pills (Cur-DPs) formulation using melt mixing methods. The optimal formulation consisted of Polyethoxyl...

Development and Validation of a Discriminative Dissolution Method for Atorvastatin Calcium Tablets using in vivo Data by LC and UV Methods

A dissolution method to analyze atorvastatin tablets using in vivo data for RP and test pilot (PB) was developed and validated. The appropriate conditions were determined after solubility tests using different media, and...

Download PDF file
  • EP ID EP682173
  • DOI  10.1208/s12249-015-0359-0
  • Views 106
  • Downloads 0

How To Cite

Siddhartha Maity, Biswanath Sa (2016). Compression-Coated Tablet for Colon Targeting: Impact of Coating and Core Materials on Drug Release. AAPS PharmSciTech, 17(2), -. https://europub.co.uk/articles/-A-682173