A capsule whose shell uses hypromellose, also called hydroxypropyl methylcellulose, a cellulose derivative.
Also called: hypromellose capsule; hydroxypropyl methylcellulose; vegetarian capsule.
Are hypromellose and HPMC different capsule materials?
They name the same polymer: hydroxypropyl methylcellulose is commonly abbreviated HPMC and called hypromellose. The polymer name does not describe the complete shell formulation. Depending on the grade, a shell can also contain gelling-system ingredients such as carrageenan and potassium chloride.
When comparing offers, ask for the exact grade and its ingredient statement. “Vegetarian capsule” is a broader description than one named HPMC formulation. Neither a material nickname nor a plant-origin claim establishes that two offered shells have the same composition, dimensions or operating behavior.
No. HPMC capsule grades can have different release designs, including immediate-release and acid-resistant applications. The material name alone does not establish release behaviour for a filled supplement. Use evidence for the actual shell grade and formulation.
The same caution applies to processing. Shells can differ in shape, pre-closing force and dimensional tolerances. A change from gelatin to HPMC needs assessment with the proposed shell and line; it is not a promise of identical settings or rejection rates.