Formulation

Solid oral drug products are one of the oldest of all manufactured dosage forms (1). Today, the development of an appropriate formulation of drug and excipients and of an effective manufacturing process to create a tablet or capsule is slowly transforming from a practice of applied art to one of applied science. The US Food and Drug Administration supports this change by expecting sponsors of new drug applications to understand, describe, and control materials and processes as well as the risks associated with drug product manufacturing (2). These steps will ensure the consistent production of products that meet their specifications and remain safe and effective during their shelf life.

New technology for improved absorption of certain proteins and macromolecules...

Formulators currently face numerous challenges in nanosuspension development in terms of ensuring safety, efficacy, and stability. Presenters at Wednesday's AAPS symposium offered strategies for addressing these challenges, including setting meaningful particle-size specifications, selecting the method to measure particles in nanosuspensions (especially for nonspherical particles), gaining a meaningful particle-size distribution, and determining the particle size from such distributions.

As a pharmaceutical formulation tool, molecular simulation is currently in its early infancy. Nonetheless, presenters at Wednesday?s AAPS Annual Meeting and Exposition demonstrated that the technology is beginning to attract some interest. The topic was discussed in a presentation titled "Application of Molecular Simulations to Formulation Development and Stability Prediction."

After outlining the results of extensive studies on drug-silicate interactions, Robin H. Bogner, PhD, concluded, "We're just scratching the surface." She might have added, "pardon the pun": the effect of silicates' heterogeneous surface chemistry is one of the points of study.

Artium Technologies' (Sunnyvale, CA, www.artium.com) new diode-pumped phase Doppler interferometry systems use solid-state lasers incorporated into transmitting optics, eliminating losses that can result from fiber coupling, alignment, and degradation. According to Atrium, the advantage of this approach to optical design is improved precision and a larger dynamic range, with higher resolution over the entire range.

In the spirit that a good review of the fundamentals is always beneficial, the American Association of Pharmaceutical Scientists' Annual Meeting and Exposition featured an early morning discussion about the basic aspects of dissolution testing, including common sources of errors and deviations. The well-attended session proved that dissolution testing remains a topic of interest, especially as the industry continues to extend its application to media other than solid dosage forms, most notably soft gels.

The International Organization for Standardization (ISO, www.iso.org) has approved the use of the photometric method for liquid delivery performance verification. Artel (Westbrook, ME, www.artel-usa.com), a manufacturer of precision testing and calibration systems for liquid handling instruments, uses the photometric method to calibrate pipettes and automated liquid handlers.

Extending the life cycle of a drug product has paved the way for "the new pharmaceutical industry" according a Tuesday AAPS Annual Meeting session, "Formulation Approaches to Life Cycle Management."

Generally, tablet and capsule film coatings are applied as aqueous or organic-based polymer solutions or dispersions, graduate student Sagarika Bose (University of Connecticut) explained during her Tuesday AAPS Graduate Student Symposium presentation, "Development and Evaluation of Solventless Photocurable Pharmaceutical Film Coating." However, organic film coatings can be flammable, toxic, and must comply with strict environmental regulations. Aqueous film coating can lead to the degradation of certain drugs by heat and water.

When it comes to developing a robust lyophilization process, formulators can "pay now or pay later," says Jeff Schwegman, PhD, founder and chief scientific officer for BioConvergence. Because 30% of new drugs in clinical trials are biotech-based therapeutics (compared with 7% 10 years ago), more than ever, the US Food and Drug Administration is paying close attention to lyophilization data and questioning pharmaceutical companies about their development cycles, especially cycle development transfer, shelf-temperature mapping, dryer-to-dryer comparison studies, formulation time, process validation, and cycle deviation. Consequently, this is pushing formulators to optimize formulation variables, conduct additional testing during early-stage development, and understanding critical process parameters, equipment qualifications, and manufacturing conditions that can influence formulation behavior at a large scale. Not taking the time or effort to achieve these goals during early development could lead to redundancies in formulation work - a reality observed too often in today's practices.

"We must add our light to the sum of lights," declared Ron Reagan in his Nov. 6 keynote address to the 2005 Annual Meeting of the American Association of Pharmaceutical Scientists. He was quoting Billy Kwan, the half-Indonesian, half-Australian photojournalist of divided loyalties in the 1982 film, "The Year of Living Dangerously," a character who redeems himself by taking bold action in the face of moral crisis. Reagan encouraged the audience to take similar action to defend science, which he said is currently subordinated to political convenience.

The common crystal form of ibuprofen was changed to optimize processing and manufacturing properties. Six modified crystal forms were prepared and assessed for dissolution, morphology, particle size, density, thermal characteristics, powder x-ray diffractometry, flow properties, and tabletability.

Recent advances in transdermal technologies challenge the paradigm that only a few drugs can be delivered transdermally.

Industry, FDA, and World Health Agencies Boost Pandemic Preparedness

New Room Temperature Ionic Liquids Offer Better Viscosity

Collaboration Targets Single-Shot Japanese Encephalitis Vaccine

A radiotracer technique is a simple, fast, and sensitive technique for analyzing the integrity of clinical supply packages to water.

Although agitation improves drying efficiency and ensures uniformity of the final dry material, it can also affect the physical properties of the product as it dries. This study evaluates the effect of scale up and equipment selection on an active ingredient undergoing granulation during the drying process.

A polymer excipient that reportedly reduces spray time has received its first registration in a finished drug product.

Poly(ethylene oxide) is gaining the attention of research and development organizations and its application is extending into a wide range of drug delivery systems.

Rapidly increasing cell-culture yields have thrown an increasing burden on downstream processes just as price pressures are pushing process developers to look for economies in every purification protocol. The time-honored, effective, and expensive war-horse, Protein A, is beginning to feel some competition from small-molecule mimetics.

IAdvances in pressurized metered-dose inhalers (pMDIs) in terms of formulation capability and the performance of the container closure system enable products to be developed faster and with less technical risk. Despite new delivery devices for new molecules breaking into the pMDI market, pMDIs have the ability to gain regulatory approval significantly faster than a novel device, which could save a company many hundreds of millions of pounds.

Being the first to gain the most is a fundamental principle in the generics business because several companies compete to create generics of successful products going off patent. For a generics company to maintain revenue growth in a market in which product prices continue to fall, it must secure a continuous flow of new products, with quality and speed to market being key drivers. Thus, generics companies must be highly skilled in product and process development (1), the generics business, and achieving bioequivalence-the most critical development area.

By forming strategic collaborative partnerships with contract research organizations, pharmaceutical companies can take advantage of several strategies for accelerating drug development, maximizing profitability, and extending patent exclusivity.

The aim of this study was to analyse the process of tablet formation and the properties of the final tablets for six different carrageenans. The carrageenans used were based on the basic types of ?-, ?- and ?-carrageenan. Microcrystalline cellulose was used for comparison. Determination of material properties, compression analysis and tablet properties were described. Water content, particle size and morphology, glass transition temperature, and crystallinity were studied. The results show that the carrageenans are predominantly amorphous fibres, which are in the rubbery state during tabletting.

First Contraceptive Spray Offers Advantages over the Pill

A stepwise, process risk-assessment approach can facilitate the identification and understanding of critical process parameters, quality attributes, and in-process controls. This approach can lead to more use of science- and risk-based regulatory practices to simplify the regulatory requirements for changes to synthetic processes and to support the underlying quality systems that ensure compliance.

Molding Technique Improves Nanoparticle Production

Development Collaboration for Ophthalmic Drugs Could Eliminate Injections