Functional Excipients

FUNCTIONAL EXCIPIENTS – Improving the Water Solubility of Oral Drugs With Amorphous Solid Dispersions (ASDs)

Liliana Miinea, PhD, says with certain polymers, it is possible for drug formulators to take full advantage of the benefits of ASDs, enabling them to overcome formulation challenges to deliver more effective novel drug products capable of transforming the lives of patients.

FORMULATION FORUM – Lipid Nanoparticles: Tackling Solubility Challenges With Lipid-Based Technologies for Oral & Injectable Formulations

Jim Huang, PhD, and Shaukat Ali, PhD, believe as more hydrophobic or brick dust and/or lipophilic or waxy molecules come out of discovery, amorphous solid dispersions (ASDs) and lipid based self-emulsifying microemulsions, nanoemulsions, liposomes, and nanoparticles are ideal for oral and injectable formulations.

TOP SPRAY GRANULATION – POLYOX™: Producing Lightweight Metformin Hydrochloride Extended-Release Tablets for Patient Adherence & Cost-Effective Manufacturing

Atul Lohade, PhD, Vinay Muley, and Tejas Gunjikar, PhD, explain how understanding the challenges associated with developing smaller extended-release tablets, and the excipient-based solutions to these challenges, will empower formulators to develop robust, stable drug formulations with high patient adherence while cutting manufacturing costs.




What are functional excipients?

The global pharmaceutical excipients market was valued at $7.7 billion in 2020 and is expected to reach $11.2 billion by 2026. Functional excipients are witnessing a strong demand as companies supply a wide range of functional excipients that help manufacturers produce cost-effective, high-quality, finished pharmaceutical product. Many industry experts point to a widening demand and use of organic pharmaceutical excipients. These organic excipients include oleochemicals, petrochemicals, proteins, carbohydrates, and others. Additionally, binders and functional excipients are witnessing a strong demand. Regarding delivery route, it is the topical segment that is witnessing fast growth in the global pharmaceutical excipients market, as topical drug delivery is witnessing a significantly stronger progression be­cause of its ability to surpass the metabolism pathways of the stomach and liver.

However, the high cost associated with the drug development process will impede the growth rate of the pharma­ceutical excipients market. Additionally, strict government regulations have hindered the pharmaceutical excipients market growth. Safety, quality concerns, and lack of awareness will further challenge the market in the forecast period mentioned above.

This is particularly true for novel excipients, which do have technical, therapeutic, and commercial benefits in oral drug delivery. Despite their formulation-enhancing benefits, novel excipients are sacrificed early in development because of a lack of prece­dence of use.

Without an independent path­way to allow new excipients or new uses for existing excipients into drug products, except when associated with a drug filing, there are limited tools available for pharmaceutical compa­nies to formulate better performing, and in many cases, life-saving drugs. Meanwhile, drug manufacturers are reluctant to use new excipients and take on the additional layer of scrutiny from regulatory agencies to demonstrate full excipient characterization, safety, quality, func­tion, and appropriateness of use.

Functional Excipients and the FDA

The Food & Drug Administration (FDA) has acknowledged that the lack of novel excipients is indeed a prob­lem. In September 2021, the Agency announced the Novel Excipient Review Pilot Program, which will select and re­view four novel excipients in the next two years using a new pathway. This will allow manufacturers to obtain an FDA review prior to the use of the novel excipient in a drug formulation.

The FDA’s recent stance and accept­ance that the novel excipients are crit­ical in development of new drug candidates, the perceptions around the novel excipients are being changed as the Agency continues to embrace the facts that the pharma in­dustry is in dire need of new excipients for bringing the innovative drugs to the market faster. This is the first time in history that the agency is opening doors for novel ex­cipients to be freely evaluated and used in the innovative formulations for NCEs.

Note, though, that this is not an excipient approval process; the novel excipient would still be evaluated as part of the overall drug product ap­proval. In the next 3 to 5 years, we can expect to see an accel­eration in the examination of the com­position and purity of excipients.