Is there any alternative capsule for pharmaceutical hard gelatin empty capsule?

Yes, there are several common substitutes for pharmaceutical hard gelatin empty capsules, which may be based on factors such as materials, characteristics, and uses. Some of the main alternatives include:
Plant based capsules (plant cellulose capsules): These capsules are made from plant cellulose or cellulose derivatives, making them suitable for vegetarians and individuals with specific religious or cultural backgrounds. They are similar in performance to hard gelatin empty capsules, but do not contain animal components.
Thin film coated capsules: Thin film coated capsules are usually made of gelatin or plant cellulose, and their surface is covered by a thin film. Colors or other coatings can be added to the surface to achieve specific release characteristics or protect drug components.
HPMC (Hydroxypropyl Methylcellulose) Capsules: This type of capsule is similar to hard gelatin capsules, but made from hydroxypropyl methylcellulose and is a synthetic material suitable for vegetarians and specific religious or cultural backgrounds.
Soft capsules (soft shell capsules): Soft capsules are usually made of gelatin or plant cellulose, but their outer shell is relatively soft and can accommodate liquid or semi-solid fillers inside. Soft capsules may be more suitable for certain types of drugs or special production needs in certain situations.
Hard shell capsules (hard shell hollow capsules): This type of capsule is similar to hard gelatin empty capsules, but is usually made of different types of polymers, such as polyethylene or polypropylene. They can be used for special drug formulations or special production needs.
These alternatives offer multiple options to meet different formulation needs, production requirements, and consumer preferences. When selecting substitutes, consideration should be given to the characteristics of the drug ingredients, the needs of the target audience, and the technical and regulatory requirements during the manufacturing process.