Why Aseptic Fill Finish is Essential to the Pharmaceutical Industry

 

Why Aseptic Fill Finish is Essential to the Pharmaceutical Industry

An aseptic fill finish, also known as sterile filling of drugs, is the last and one of the most challenging stages in the drug creation processes. This process is so complex because it requires careful planning, thoroughly trained workers, and specialized facilities/ equipment to pull it off. It also requires close coordination and complex interactions between the persons operating the systems, sterilized products, clean room, and sterilized filling equipment.

This process of fill finish manufacturing is a process that relies significantly on a perfect technique, and slight errors can have a significant impact on the end-users. Considering that these sterile drugs are to be used on already compromised patients, it is important that they relieve and not further complicate the situation.

Many complex biochemical, pharmaceutical, and biotechnology drugs products wouldn't be able to undergo terminal sterilization rigors, which has resulted in the demand for the aseptic fill finish method.

Drug products delivered via parental, ophthalmic, inhaled, or optic paths present a unique challenge for drug manufacturers because they bypass many of the body's natural defenses. This increases the risk of infection if such drugs aren't sterilized properly. This is also why the FDA pays close attention and rules governing sterile aseptic fill finish to ensure patient safety.

How are sterile drugs manufactured?

In general, there are two ways to manufacture sterile drug fill finish products, namely:

•Terminal Sterilization: This is a process where drug containers are filled and sealed under high-quality environmental conditions. This subjects the drugs in their final container to a sterilization process such as heat and irradiation.

•Aseptic Manufacturing and Sterile Fill Finish: this is a process where the drug products, its container, and closure are all sterilized separately and appropriately. After doing this, they are put together (aseptic manufacturing) to form the final form. Because it would be harmful to sterilize the products in its final container, it is better each item is sterilized individually and then put seal together in an extremely sterilized environment (sterile fill finish). Meeting all these conditions is what makes aseptic fill finish very challenging.

Considerations for aseptic processing and a medical fill finish

•Drug products component: Regardless of the form in which the drug comes, each drug product component must be sterilized before aseptic processing. These include active pharmaceutical ingredients (APIs), water for injection (WFI), and any other drug formula component. There are several FDA-recommended sterilization methods.

•Heat sterilization: This is the most common type of sterilization used in the pharmaceutical fill finish. In this method, the components are exposed to dry heat or moist heat.

•Radiation sterilization: This is a method where the components are exposed to electromagnetic radiation to kill microorganisms. 

•Filter sterilization: Here, a component is dissolved in WFI or another suitable vehicle and is passed through a membrane with 0.2 microns or a smaller pour size. This removes microorganisms such as bacterias, but this method can't be used if formulation components have large particles.

•Ethylene Oxide Gass Sterilization: This method is majorly used to sterilize bulk API powder and container system by exposing them to ethylene oxide (EtO) over some time. This method serves as the best option for sterilizing heat sensitive and moisture sensitive components.

The need for reliable fill finish manufacturing will continue to grow. This is because we will continue to develop more complex parenteral, ophthalmic, and otic drug products.