THE EMERGENCE OF FAST MELT TABLETS: A BOON FOR PATIENTS
Fast melt tablets, also known as orally disintegrating tablets, are tablet formulations that dissolve or disintegrate quickly in the mouth without need of water. When placed on the tongue, these special formulations disintegrate within seconds to minutes, allowing easy administration of medication for patients who have difficulty in swallowing conventional tablets. Not only do they dissolve rapidly in the mouth, but they also have a pleasant taste that does not leave an unpleasant sensation after dissolving.
Benefits of Fast Melt Tablets
Fast melt tablets offer several advantages over conventional tablets for various patient groups, making them a preferred dosage form:
Convenience of Administration
As they dissolve rapidly in saliva, fast melt tablets can be administered easily without water. This makes them very convenient to take for patients who have problems swallowing tablets or capsules, including pediatric, geriatric and dysphagic patients.
Rapid Onset of Action
Since they dissolve/disintegrate in the mouth, drugs from these formulations get absorbed via buccal, sublingual or gastrointestinal routes and show faster onset of action compared to conventionally formulated tablets.
Non-Invasive Drug Administration
Fast melt tablets who cannot swallow or are unable to take drugs orally due to nausea, vomiting or other reasons, fast melt tablets provide a non-invasive mode of administration without requiring help from others.
Patient Compliance
The ease of administration leads to improved patient compliance especially in pediatric, geriatric and psychiatric patients who may forget or refuse to take medications in the absence of water.
Technologies Used for Developing Fast Melt Tablets
Several technologies have been developed for preparing fast melt tablets with the desired rapid melt properties:
Freeze Drying/Lyophilization: This process involves freezing the formulation and then drying under vacuum which allows tablets to dissolve or disintegrate in the mouth rapidly. However, it is a costly method.
Molding: It involves molding of formulation containing specific excipients including sugar alcohols to impart properties of fast melting. Technologies used are direct compression and tablet molding. Tablets produced have an elegant finish but the process is mechanically complex and costly.
Sublimation or Crystallization: Using this technology, ingredients like camphor, fine crystals of sugars etc. are allowed tosublime inside a mold resulting in a porous structure which facilitates fast melt characteristics. But again the process dynamics is complex.
Compressed Tablet Using Diluents: Polymers, sugars like Mannitol, Sorbitol etc. are directly compressed along with active drug and other excipients into tablets. Being highly water soluble/porous, these tablets have inherent fast melt properties. This simple compression process is economical and suitable for commercial production.
Classification Based on Melting Time
Fast melt tablets are typically classified based on the time they take to dissolve/disintegrate in the mouth as:
Very Fast Dissolving/Disintegrating Tablets (less than 30 seconds): e.g. ODT OraSolv technology
Fast Dissolving Tablets (30-60 seconds): e.g. Zydis technology
Rapidly Disintegrating Tablets (under 1 minute): e.g. Flashtab, Quicksolv, Durasolv technologies
These classification ranges indicates the type of excipients and processing technology used during manufacturing.
Formulating Challenges
While fast melt technologies overcome the problem of swallowing, formulating these specialty tablets comes with certain challenges:
Stability Issues: Moisture absorption makes these dosage forms prone to caking/aggregation issues on storage. Proper packaging and low moisture content is critical.
Taste Masking: Most active ingredients have a bitter or unpleasant taste that needs masking to provide acceptable mouthfeel.
Mechanical Strength: Being highly porous and soluble, enough mechanical integrity is required to withstand handling/packaging without crumbling.
Process Scale-up: Optimizing parameters to scale-up lab processes for commercial production with consistent results is a challenge.
Fast melt drug delivery systems are a boon for dysphagic patients and address the needs of special populations with swallowing difficulties. The availability of various techniques to impart rapid dissolution properties allows development of these user-friendly drug formulations. With continued product and process innovations to overcome stability and taste issues, fast melt tablets promise to revolutionize drug therapy by providing truly convenient dosage forms for improved patient compliance and therapeutics.
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Priya Pandey is a dynamic and passionate editor with over three years of expertise in content editing and proofreading. Holding a bachelor's degree in biotechnology, Priya has a knack for making the content engaging. Her diverse portfolio includes editing documents across different industries, including food and beverages, information and technology, healthcare, chemical and materials, etc. Priya's meticulous attention to detail and commitment to excellence make her an invaluable asset in the world of content creation and refinement.
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