Oral medicines are available in several dosage forms, with tablets and capsules being among the most widely recognized. Although both are designed to deliver pharmaceutical ingredients through oral administration, their formulation and manufacturing processes can differ significantly.
Understanding these dosage forms provides useful insight into pharmaceutical product development and manufacturing.
What Are Tablets?
Tablets are solid dosage forms produced by processing pharmaceutical ingredients into a defined shape and size.
Depending on the formulation, tablet manufacturing may involve:
- Dispensing
- Blending
- Granulation
- Compression
- Coating
- Packaging
The manufacturing process must be carefully controlled to achieve consistent tablet characteristics.
What Are Capsules?
Capsules generally consist of a shell containing a pharmaceutical formulation.
The contents may include powders, granules, pellets, or other suitable materials depending on the product design.
Capsule manufacturing can involve:
- Powder or granule preparation
- Blending
- Capsule filling
- Closing or sealing
- Inspection
- Packaging
Why Are Different Dosage Forms Used?
Different dosage forms can be developed to meet different formulation and product requirements.
Considerations may include:
- Stability
- Drug release
- Manufacturing characteristics
- Patient convenience
- Ingredient properties
- Packaging requirements
Tablet Coating
Some tablets are coated to provide specific functional or protective characteristics.
Coating may help improve product appearance, protect ingredients, or support a particular release profile depending on the formulation.
Modified-Release Products
Some pharmaceutical products are designed to release their active ingredients over a specific period or under particular conditions.
Such formulations require carefully designed manufacturing processes and appropriate quality controls.
Quality Considerations
Both tablets and capsules require appropriate controls throughout manufacturing.
Manufacturers need to ensure that the finished product consistently meets applicable specifications for identity, strength, quality, purity, and other relevant characteristics.
FDA’s dosage-form resources recognize numerous pharmaceutical dosage forms, including different types of tablets and capsules.
Conclusion
Tablets and capsules may appear simple from a patient’s perspective, but their development and manufacturing involve multiple scientific and quality considerations.
From formulation development to production, testing, packaging, and storage, each stage contributes to producing a consistent oral dosage form.
