Are Gelatin Empty Capsules Classified As Medicines?

Gelatin empty capsules are not therapeutic drugs. Instead, they fall under the category of pharmaceutical excipients, primarily used to encapsulate medicinal powders, granules or liquids. Below is a detailed breakdown of their core functions and classification criteria:

I. Core Functions: Encapsulation & Drug Protection

1. Physical Stabilization

Manufactured from pharmaceutical-grade gelatin (protein extracted from animal skins and bones), the rigid capsule shell isolates encapsulated drugs from external factors including light, oxygen and moisture. This prevents oxidation, deliquescence and volatilization to maintain drug stability.

For light-sensitive formulations, opacifiers like titanium dioxide are added to produce opaque capsules and extend shelf life.

2. Mask Unpleasant Tastes & Odors

Capsule shells effectively conceal bitter or foul-tasting active ingredients (such as certain antibiotics and herbal extracts), greatly improving swallowing experience-especially for children and patients sensitive to bad flavors.

3. Targeted Drug Release

Enteric-coated gelatin capsules are engineered to deliver active ingredients specifically in the intestinal tract. This protects drugs from degradation by gastric acid and boosts bioavailability, as seen in formulations like enteric-coated metformin hydrochloride capsules.

II. Classification Standard: Definition of Pharmaceutical Excipients

Global & Domestic Regulatory Standards

Per the Chinese Pharmacopoeia and international ICH guidelines, gelatin empty capsules are formally defined as pharmaceutical excipients, not active pharmaceutical ingredients (APIs).

Their sole purpose is to aid formulation shaping, stabilize actives or regulate drug release; they exert no direct therapeutic effects.

Key Distinction Between Drugs and Excipients

Medicinal Drugs: Contain APIs (e.g., aspirin, penicillin) for the diagnosis, treatment or prevention of illnesses.

Pharmaceutical Excipients: Inactive carriers or formulating agents with no curative properties, including capsule shells, tablet coatings and solvents. Gelatin empty capsules belong to this group and must comply with strict pharmaceutical quality standards covering microbial limits, heavy metal content and more.

III. Clarification of Common Misconceptions

Misconception 1: Gelatin capsules are Traditional Chinese Medicine (TCM)

This misunderstanding arises because capsules are widely used to hold TCM powders and extracts. However, authentic TCM preparations rely on bioactive herbal ingredients; the capsule shell itself carries no medicinal efficacy and merely acts as a delivery container.

Misconception 2: Additives change its classification

Even with auxiliary additives such as glycerin (plasticizer) and ethylparaben (preservative), the finished capsule remains an excipient. These additives only optimize physical performance without delivering therapeutic effects.

IV. Main Industrial Applications

1. Encapsulation of Solid Pharmaceuticals

They are universally adopted to hold antibiotics, vitamins, herbal extracts and other solid medications to resolve poor taste and swallowing difficulties. Typical examples include amoxicillin capsules and vitamin C capsules.

2. Customized Brand & Dosing Solutions

Capsules can be printed with logos, brand names or dosage markings for brand differentiation. Multiple standard sizes (Size 000 to Size 5) are available to match different drug dosages.

3. Specialized Formulation Support

Enteric-modified gelatin capsules enable intestinal-specific drug release, reducing gastric irritation for sensitive medicines such as enteric-coated aspirin tablets.