Formulation and In-Vitro Characterization of pH-Responsive Semi-Interpenetrating Polymer Network Hydrogels for Controlled Release of Ketorolac Tromethamine
Open Access
- 13 October 2021
- Vol. 7 (4), 167
- https://doi.org/10.3390/gels7040167
Abstract
Ketorolac tromethamine is a non-steroidal anti-inflammatory drug used in the management of severe pain. The half-life of Ketorolac tromethamine is within the range of 2.5–4 h. Hence, repeated doses of Ketorolac tromethamine are needed in a day to maintain the therapeutic level. However, taking several doses of Ketorolac tromethamine in a day generates certain complications, such as acute renal failure and gastrointestinal ulceration. Therefore, a polymeric-controlled drug delivery system is needed that could prolong the release of Ketorolac tromethamine. Therefore, in the current study, pH-responsive carbopol 934/sodium polystyrene sulfonate-co-poly(acrylic acid) (CP/SpScPAA) hydrogels were developed by the free radical polymerization technique for the controlled release of Ketorolac tromethamine. Monomer acrylic acid was crosslinked with the polymers carbopol 934 and sodium polystyrene sulfonate by the cross-linker N’,N’-methylene bisacrylamide. Various studies were conducted to evaluate and assess the various parameters of the fabricated hydrogels. The compatibility of the constituents used in the preparation of hydrogels was confirmed by FTIR analysis, whereas the thermal stability of the unreacted polymers and developed hydrogels was analyzed by TGA and DSC, respectively. A smooth and porous surface was indicated by SEM. The crystallinity of carbopol 934, sodium polystyrene sulfonate, and the prepared hydrogels was evaluated by PXRD, which revealed a reduction in the crystallinity of reactants for the developed hydrogels. The pH sensitivity of the polymeric hydrogel networks was confirmed by dynamic swelling and in vitro release studies with two different pH media i.e., pH 1.2 and 7.4, respectively. Maximum swelling was exhibited at pH 7.4 compared to pH 1.2 and, likewise, a greater percent drug release was perceived at pH 7.4. Conclusively, we can demonstrate that the developed pH-sensitive hydrogel network could be employed as a suitable carrier for the controlled delivery of Ketorolac tromethamine.Keywords
Funding Information
- National Science Council of Taiwan (MOST 110-2320-B-037-014-MY2)
- Kaohsiung Medical University Research Foundation (KMU-TC109A03-1)
This publication has 70 references indexed in Scilit:
- Electrospun diclofenac sodium loaded Eudragit® L 100-55 nanofibers for colon-targeted drug deliveryInternational Journal of Pharmaceutics, 2011
- Analysis of soluble and insoluble fractions of alkali and subcritical water treated sugarcane bagasseCarbohydrate Polymers, 2011
- Qualitative analysis of controlled release ciprofloxacin/carbopol 934 mucoadhesive suspensionJournal of Advanced Pharmaceutical Technology & Research, 2011
- Synthesis and characteristics of pH-sensitive semi-interpenetrating polymer network hydrogels based on konjac glucomannan and poly(aspartic acid) for in vitro drug deliveryCarbohydrate Polymers, 2010
- Formulation and evaluation ofin situgels containing clotrimazole for oral candidiasisIndian Journal of Pharmaceutical Sciences, 2009
- Semi-IPNs of starch and poly(acrylamide-co-sodium methacrylate): Preparation, swelling and diffusion characteristics evaluationReactive and Functional Polymers, 2006
- Evaluation of alternative strategies to optimize ketorolac transdermal deliveryAAPS PharmSciTech, 2006
- 'Smart' polymers and what they could do in biotechnology and medicineTrends in Biotechnology, 1999
- Controlled Drug Delivery: A Critical ReviewJournal of Biomaterials Applications, 1986
- Tailoring closely packed gel–particle systems for use as thickening agentsJournal of Applied Polymer Science, 1977