Turning Medicine into a Piece of Paper That Dissolves on the Tongue in 5 Seconds: We Experienced This Groundbreaking New Dosage Form

Oral dosage forms are often the preferred route of administration for both doctors and patients due to their convenience. Common solid oral dosage forms mainly include tablets and capsules. However, these typically require high patient compliance and often pose swallowing difficulties due to their shape, size, or taste, severely impacting medication adherence. This issue is particularly prominent among pediatric patients, where swallowing solid formulations can easily lead to spitting out the medication or even choking risks. Similarly, administering supplements to pets is challenging, often requiring mixing with palatable food, which greatly affects the absorption of active ingredients and results in significant waste. Furthermore, patients with neurological system disorders or limited behavioral control also face medication difficulties and safety challenges.

To further optimize dosage forms, improve stability and applicability, oral thin films have been developed, gradually becoming a more promising novel oral drug delivery system.

I. Definition of Oral Soluble Films

Oral Dissolving Films (ODF), also known as orally disintegrating films, oral dispersible films, orodispersible films, sublingual films, etc., are ultra-thin film dosage forms where the active ingredient (drug, nutrient, etc.) is embedded within a water-soluble polymer matrix. Their size, shape, and thickness are similar to a postage stamp. Placed on the tongue, they dissolve rapidly in saliva without the need for water, releasing the drug. Their innovation stems not from new molecular entities, but from a fundamental reshaping of the delivery system. Due to advantages like easy portability and rapid dissolution in the mouth, oral films have developed rapidly, with several marketed products available both domestically and internationally.

II. Mechanism of Action of Oral Soluble Films

When placed in the mouth without water or chewing, ODFs can disintegrate or dissolve within one minute. The film is placed on the patient's tongue or other oral mucosal tissue. Due to the presence of hydrophilic polymers and other excipients in the film, it is immediately moistened by saliva, rapidly hydrates, adheres to the application site, and dissolves quickly to release the drug, allowing for rapid action via absorption through the mucosal bloodstream.

III. Advantages of Oral Soluble Films

1. Waterless Disintegration, a Revolution in Convenience: Placed on the tongue, no water needed, begins dissolving within tens of seconds. This perfectly solves the swallowing challenges of traditional tablets/capsules, directly targeting key demographics like infants, the elderly, patients with dysphagia, and pets.

2. Excellent Taste Masking, Improved Compliance: Utilizing advanced taste-masking technologies like microencapsulation and ion-exchange resins, ODFs can effectively block strong bitter tastes and unpleasant odors of drugs, supplemented with flavoring agents (e.g., fruit, mint), greatly improving patient (especially children) medication adherence.

3. Rapid Onset, High Bioavailability: Drugs can be absorbed directly through the rich vasculature of the oral mucosa, bypassing gastrointestinal degradation and the hepatic "first-pass effect," increasing bioavailability and enabling rapid onset of action. This is particularly suitable for emergency situations (e.g., stopping seizures) and anti-emetic scenarios.

4. Accurate Dosing & Portability/Privacy: Precise manufacturing ensures uniform content and accurate dosage in each film. Their thin, lightweight nature makes them portable, and the discreet administration process protects the privacy of patients with conditions like mental health disorders or HIV.

5. Industry Value Proposition: ODF technology isn't merely a substitute for tablets; it creates a new category of dosage forms, targeting the "patient compliance pain point market" and enabling differentiation.

IV. Global Perspective: Industry Maturity and Leadership

Currently, the United States, Canada, the UK, and India remain the primary global markets for such products. Presently, major ODF products in pharmaceutics are largely concentrated in areas like mental illness, severe pain, acute episodic diseases, and basic nutritional supplementation, along with some smoking cessation products and traditional Chinese medicine products requiring rapid onset.

In European and American markets, this technology is very mature, product lines are diverse, and new drugs continue to adopt this form. It has become an indispensable and rapidly growing part of modern pharmaceutical formulations.

• High Technological Maturity: Presence of technology platform companies like Aquestive (PharmFilm® technology), Indivior, LTS Lohmann, etc., which master core technologies from formulation design to large-scale production and packaging.

• Rich Product Pipeline: Numerous well-known marketed products, covering various fields from prescription (Rx) to over-the-counter (OTC) drugs.

V. Chinese Perspective: The Rise and Challenges of the Domestic Industry

The Chinese market is currently in a phase of rapid transition from introduction to growth, full of both opportunities and challenges. China's vast aging and child-rearing populations, coupled with its rapidly developing pet industry, constitute a huge potential market. Policies strongly encourage innovative dosage forms, leading key pharmaceutical companies to prioritize development in this area. The industrial chain and market awareness are gradually being established, with oral films being highly favored as a key direction.

According to reports from Pharmaceutical Integration Research Institute, the development of ODFs in China accelerated from 2020, with 8 approved varieties. Involved enterprises mainly include Qilu Pharmaceutical, Hengrui Medicine, Jiangsu Hansoh Pharmaceutical, and CR Zizhu Pharmaceutical, with Qilu Pharmaceutical having 5 related marketed drugs.

Conclusion: The Ultimate Insight from an Industry Perspective

From an industry standpoint, oral soluble films are not just a product, but a strategic choice. For the entire industry, they represent the tangible implementation of the "patient-centric" R&D philosophy, signaling that future drug development will increasingly focus on the precise efficacy delivered through a positive medication experience. As research deepens, oral films are expected to see broader development in medical fields such as Parkinson's disease, depression, schizophrenia, Alzheimer's disease, and analgesia, as well as in health foods like daily vitamins and nutrient supplements. Furthermore, breakthroughs are anticipated in research on vaccines, peptides, and protein drugs.

It is believed that in the future, as the industrial chain matures and technology disseminates, the application of oral soluble films will flourish.