The monograph outlines several "mandatory" tests that tablets must pass to be compliant. These include: Uniformity of Dosage Units

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Often colloquially referred to as "hardness" testing, this evaluates the diametral force required to crush the tablet. While the monograph requires manufacturers to measure this property to ensure structural integrity, specific numerical limits are usually defined in the individual substance monographs rather than the general 0478 text. 4. Specific Requirements by Tablet Type

: To facilitate the manufacturing process.

: It does not naturally apply to lozenges, oral pastes, oral gums, or tablets modified for alternate cavities. Separate general monographs regulate those specific pathways, such as Rectal Preparations (1145) , Vaginal Preparations (1164) , and Oromucosal Preparations (1807) . 2. Production and Mechanical Strength Requirements

| Parameter | Ph. Eur. 0478 | USP <701>/<711> | JP (General Tests) | | :--- | :--- | :--- | :--- | | Disintegration time (uncoated) | 15 min | 15 min (but often 30 min for large tabs) | 15 min | | Dissolution vessel volume | 900 mL (preferred) | 500, 900, or 1000 mL | 900 mL | | Friability acceptance | 1.0% (uncoated) | 1.0% (but 0.8% for high-use) | 1.0% | | Uniformity of dosage units | AV ≤ 15.0 (2.9.40) | AV ≤ 15.0 (identical via ICH Q4B) | AV ≤ 15.0 |

Tablets must be examined visually to ensure they are not broken, have a smooth surface (unless scored), and are free from obvious defects like cracks or spots.

: Uncoated tablets containing acid substances and carbonates/hydrogen carbonates. They react rapidly in water to release carbon dioxide, dissolving or dispersing the drug for consumption.