A method of producing a coatable core for a modified release drug formulation for oral administration. The coatable core has a high drug load of at least 70 wt % based on the total weight of the coatable core. The method comprises the steps of granulating a composition comprising a drug and at least one binder to form granules； blending the granules with a pharmacologically acceptable disintegrant and optionally one or more additional pharmacologically acceptable excipients to form a compression blend, wherein the disintegrant is present in an amount from about 0.5 wt % to about 5 wt %, based on the total weight of the coatable core； and compressing the compression blend using an external lubrication compression method to form a coatable core.
