What is freeze drying in pharmaceuticals?

What is freeze drying in pharmaceuticals?

Freeze drying pharmaceuticals uses a process called lyophilization to lower the temperature of the product to below freezing, and then a high-pressure vacuum is applied to extract the water in the form of vapour. The vapour collects on a condenser, turns back to ice and is removed.

What is the difference between freeze drying and lyophilization?

Freeze drying, also known as lyophilisation or cryodesiccation, is a low temperature dehydration process that involves freezing the product, lowering pressure, then removing the ice by sublimation. This is in contrast to dehydration by most conventional methods that evaporate water using heat.

What are the advantages and disadvantages of freeze drying?

Freeze-dried foods tend to retain most of their nutritional quality, taste, shape and size. Freeze-dried foods don’t require refrigeration. Freeze-dried foods can last for months or years. Freeze-dried foods can also be rehydrated very quickly, unlike dehydrated foods.

What is freeze drying in microbiology?

Lyophilization, also known as freeze-drying, is a process used for preserving biological material by removing the water from the sample, which involves first freezing the sample and then drying it, under a vacuum, at very low temperatures.

What is the process of freeze drying?

Freeze Drying is a process in which a completely frozen sample is placed under a vacuum in order to remove water or other solvents from the sample, allowing the ice to change directly from a solid to a vapor without passing through a liquid phase.

What is the purpose of lyophilization?

Lyophilization is a water removal process typically used to preserve perishable materials, to extend shelf life or make the material more convenient for transport. Lyophilization works by freezing the material, then reducing the pressure and adding heat to allow the frozen water in the material to sublimate.

What is the benefit of lyophilization?

Some of the advantages of lyophilization, according to the FDA, include: Processing a liquid with ease (and thereby simplifying aseptic handling) Enhancing the stability of a dry powder as well as the product stability in a dry state. Removing water without having to heat the product excessively.

What are the benefits of freeze drying?

Freeze-drying retains nutritional value better than other drying methods, further supporting consumers’ desire for nutrition from whole foods. The process also preserves the actual color and shape of the original raw material, reassuring consumers they are actually getting real fruits and vegetables in their diets.

What are the cons of freeze drying?


  • Water required for reconstitution (except for simple snacks)
  • Slow process — average cycle is 24+ hours.
  • Some dislike the dry, styrofoam texture.
  • Not all foods can be freeze dried.
  • Airtight containers are required for long-term storage.
  • No space savings — the food’s cellular structure is mostly retained.

What are the 3 main steps involved in freeze drying?

Freeze-drying processes consist of the three steps: freezing, primary drying ,and secondary drying. The freezing step is best done in a very-low-temperature freezer in a short time to keep the size of ice crystals as small as possible, thereby causing less physical damage to the structure of the product.

What process is freeze drying?

What is lyophilization and how is it used in pharmaceutical industry?

Lyophilization has been used in many different research projects in the pharmaceutical industry. As has been mentioned, the process provides excellent retention of the three-dimensional structures of biological samples, which aids in the accuracy of drug developmental research.

What is secondary drying in lyophilizer?

Secondary Drying (Desorption): During this step, the shelf temperature in the lyophilizer is gradually raised under low pressure to drive off residual water or solvent.

Why choose cdcdmos for lyophilization?

CDMOs like Lubrizol Life Science Health (LLS Health) have the equipment and personnel in place to both develop and scale-up sterile lyophilization processes. As the number of complex molecules in the drug development pipeline increases, more and more products stand to benefit from lyophilization.

What is pharmaceutical freeze-drying used for?

Commonly applied to the production of injectable dosage forms of drugs, pharmaceutical freeze-drying is also used to produce diagnostics. Less commonly, it is used to produce solid oral dosage forms that require a very fast dissolution rate.