Immediate Release Tablets and Parenterals

In the world of pharmaceuticals, the development and research of new drug delivery systems are continually evolving. Among the various forms of drug delivery, immediate release tablets and parenteral formulations have been at the forefront of innovation. In this comprehensive article, we will explore the intricacies of immediate release tablets, particularly film-coated, chewable, and bi-layered tablets, as well as delve into the fascinating world of parenterals, including form-fill-seal (FFS) technology, bags, and emulsions.

Immediate Release Tablets

Immediate release tablets are a crucial category of pharmaceutical formulations designed for the rapid delivery of medication into the bloodstream. They offer a quick onset of action, making them particularly useful for medications that require fast absorption. Let’s take a closer look at some subcategories of immediate release tablets:

Film Coated Tablets

Film-coated tablets are a popular choice in pharmaceuticals. This process involves covering a tablet, capsule, or pellet with a thin layer of film. This film serves multiple purposes, such as protecting the tablet from environmental factors and making it easier to swallow. The film can also mask the taste of the medication, enhancing patient compliance.

Chewable Tablets

Chewable tablets, as the name suggests, are meant to be chewed and then swallowed by the patient. They are often used for medications that are unpalatable or difficult to swallow in their regular form. This form of medication is especially beneficial for children and the elderly, who may have difficulty swallowing conventional tablets.

Bi-Layered Tablets

Bi-layer tablets are an innovative approach to immediate release formulations. They consist of two layers, with the first layer designed for immediate drug release and the second layer intended to release the drug later, either as a second dose or in an extended-release form. This provides precise control over drug release, making it suitable for medications that require a dual-action effect.


Capsules are another versatile form of drug delivery, and they come in various types to cater to different pharmaceutical needs. Two notable subcategories are powder-filled capsules and tablets in capsules:

Powder Filled Capsules

Powder-filled capsules are a popular solid dosage form used to simplify the delivery of medication. They are often preferred over tablets because they are easier to swallow, especially for patients who have difficulty with large tablets. These capsules are made from gelatin or similar materials and can hold various forms of medication, including powders and granules.

Tablet in Capsules

Tablets in capsules represent a multifunctional and multiple-unit system. These capsules contain versatile mini-tablets within a hard gelatin capsule. This approach offers flexibility in drug formulation and dosing. It’s particularly useful for combination therapies or when different release profiles are needed for various components of the medication.


Parenteral formulations are those that are administered outside the digestive tract, directly into the bloodstream. They play a critical role in emergency situations and when oral administration is not feasible. Let’s delve into the world of parenterals, exploring FFS technology, bags, and emulsions:

Form Fill Seal (FFS) Technology

Form fill seal (FFS) technology is a remarkable advancement in pharmaceutical manufacturing. It is an automated, computer-operated process used to prepare sterile products, often applied to I.V. infusion bottles. FFS technology sequentially, consistently, and automatically forms the container, fills it with the desired content, and seals it within a closed sterile chamber of the machine. This ensures the utmost sterility in the final product, making it ideal for critical care situations.


Bags used for injectable products are a crucial part of the pharmaceutical industry. These bags have two sides, each made from a complex film and shaped to have a flat-bottomed, dish-shaped part. They are commonly used for intravenous solutions and other sterile liquids. Bags are preferred for their flexibility, allowing easy storage and administration of a wide range of medications.


Emulsions are a unique category of parenteral formulations. They are essentially mixtures of liquids that do not naturally mix together, such as oil and water. In pharmaceuticals, emulsions are used for drugs that are not water-soluble. The emulsification process breaks down these substances into tiny droplets, improving their bioavailability and ensuring an even distribution of the drug in the body.

In the ever-evolving landscape of pharmaceuticals, immediate release tablets and parenteral formulations play a pivotal role in ensuring the efficient delivery of medications. From film-coated tablets to form fill seal technology, these drug delivery systems are the result of continuous research and innovation. Their impact on patient care, especially in emergency situations, cannot be overstated.

In this article, we’ve explored the various subcategories within immediate release tablets and delved into the world of parenterals, uncovering their unique features and applications. As the pharmaceutical industry continues to evolve, these research topics will remain at the forefront of innovation and scientific inquiry.


1. What is the primary purpose of film-coated tablets in pharmaceuticals?

Film-coated tablets are primarily used to protect the medication from environmental factors and make it easier to swallow. They can also mask the taste of the medication.

2. How do bi-layered tablets differ from conventional immediate release tablets?

Bi-layered tablets consist of two layers, with the first layer designed for immediate drug release and the second layer intended to release the drug later. This allows for precise control over drug release.

3. Why are chewable tablets popular, especially among certain patient groups?

Chewable tablets are popular because they are easier to swallow, making them suitable for children and the elderly who may have difficulty swallowing conventional tablets.

4. What is the key advantage of form-fill-seal (FFS) technology in pharmaceutical manufacturing?

Form-fill-seal (FFS) technology offers an automated, computer-operated process that ensures the preparation of sterile products, making it ideal for I.V. infusion bottles and critical care situations.

5. How do emulsions improve the bioavailability of certain drugs?

Emulsions are used for drugs that are not water-soluble. The emulsification process breaks down these substances into tiny droplets, improving their bioavailability and ensuring even drug distribution in the body.