Pharmaceutical Hot Melt Extrusion: A Cost-Effective Process to Surge Solubility
Hot Melt Extrusion (HME) has captivated the pharmaceutical industry for the manufacture of medicinal solid dispersions over the last decade. It's a flexible processing method for increasing the solubility and dissolution of water-insoluble active therapeutic components (APIs). HME services are superior to traditional formulation technologies because they can treat a wide range of ingredients, including inorganic excipients, hydrophilic polymers, and cocrystal formers. In this review study, we explore recent advances in enhanced solubility/dissolution of water-insoluble actives utilizing HME and prediction tools for process optimization.
Proprietary Hot-melt extrusion, a well-known method in the polymer industry, is making its way into pharmaceutical manufacture. HME enables novel solid oral dosage form formulations.
Its primary benefit in pharmaceutical applications is the potential to improve a drug's bioavailability by producing solid dispersions of the dynamic pharmaceutical ingredient (API) in a polymer matrix. The formulator's primary focus is achieving the right release profile (immediate or prolonged release) or increased API bioavailability.
HME services have shown unique processing technology for creating molecular dispersions of active pharmaceutical ingredients (APIs) into the various polymer or lipid matrices, allowing for time-controlled, extended, modified and targeted drug supply.
HME has received significant attention from both the pharmaceutical industry and academia in various submissions for pharmaceutical dosage forms such as tablets, capsules, films, and implants for drug delivery via oral, transdermal and transmucosal routes since the industrial application of the extrusion process in the 1930s.
As a result, HME service is an excellent alternative to other often-used processes like roll spinning and spray drying.
HME fits the purpose of the US Food and Drug Administration's (FDA) process analytical technology (PAT) system for designing, analyzing, and controlling the manufacturing process via quality control measures during the active extrusion process, in addition to being a proven manufacturing method. The hot-melt extrusion technique is discussed from a holistic standpoint, including its numerous components, processing technologies, materials, and innovative formulation design and developments in its various applications in oral drug delivery systems.
Advantages of HME
There are specific issues with HME. Thermal process (drug/polymer stability), usage of a restricted number of polymers, high flow characteristics of polymers, and excipients required are the main disadvantages of HME, which make it unsuitable for relatively high heat-sensitive molecules like microbial species and proteins. However, HME has several advantages over currently existing pharmaceutical processing procedures, including the following:
(a) Improved solubility and bio-availability of liquid-insoluble compounds;
(b) Solvent-free-non-ambient process;
(c) A cost-effective process with condensed production time, fewer processing steps, and constant operation;
(d) Sustained, modified, and targeted release capabilities;
(e) Better content uniformity in extrudates;
(f) No necessities for active ingredient compressibility;
(g) Uniform dispersion of fine particles;
(h) better steadiness at altering pH and moisture levels and safe application in mankind;
(i) Fewer unit procedures and the manufacture of a diverse variety of performance dosage forms
(j) Various screw geometries.
Conclusion
HME has proven to be a reliable way of manufacturing a variety of drug delivery systems; therefore, it has been adopted by the pharmaceutical industry, with the scope expanded to include a variety of polymers and APIs that can be processed with or without plasticizers. HME has also been demonstrated to be a solvent-free, robust, fast, and cost-effective manufacturing process for various medicinal dosage forms.
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