Question:
Coating of Eudragit NE40D on tablets is done to prepare:
Coating of Eudragit NE40D on tablets is done to prepare:
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For sustained or controlled release formulations, polymers like Eudragit are used to modify the release rate of the drug from the tablet.
Updated On: Jul 14, 2026
- Sublingual tablets
- IR tablets
- CR tablets
- Buccal tablets
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The Correct Option is C
Approach Solution - 1
Eudragit NE40D is a polymer used in the preparation of controlled-release (CR) tablets. It provides a controlled release of the active pharmaceutical ingredient, ensuring sustained drug delivery over a longer period.
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Approach Solution -2
Eudragit is a family of acrylic polymers used in tablet coating, and each grade is designed for a different release profile. Matching Eudragit NE40D to its intended tablet type:
- Sublingual tablets: Sublingual tablets are meant to dissolve quickly under the tongue for fast drug absorption, so they are formulated to disintegrate rapidly rather than being coated with a film that slows release. A controlled-release polymer coating would work against this fast-dissolving design.
- IR tablets: Immediate release, or IR, tablets are also designed to release their drug quickly after swallowing, often uncoated or coated only with a thin, quickly dissolving film for taste masking. Eudragit NE40D's job is the opposite of this, since it forms a water-insoluble but permeable film that slows drug release rather than speeding it up.
- CR tablets: Eudragit NE40D is a neutral copolymer of ethyl acrylate and methyl methacrylate that forms a flexible, water-insoluble film once it dries on the tablet surface. This film is permeable enough to let drug molecules diffuse out slowly and steadily, which is exactly the mechanism used to build controlled-release, or CR, tablets that release their drug over an extended period.
- Buccal tablets: Buccal tablets are designed to stick to the inside of the cheek and release drug through the buccal mucosa, and this usually calls for mucoadhesive polymers rather than the insoluble, diffusion-controlling film that Eudragit NE40D provides.
Since Eudragit NE40D forms an insoluble but drug-permeable film that slows and steadies release rather than speeding it up or making a tablet adhere to a mucosal surface, it fits the controlled-release category best.
So the correct answer is CR tablets.
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