THIS INVENTION PROVIDES A SOLID PHARMACEUTICAL FORMULATION HAVING HIGH PHYSICAL STRENGTH AND FURTHER HAVING EXCELLENT DRUG RELEASE PROPERTIES AND DIGESTIBILITY OF EXCIPIENTS WHEN ADMINISTERED, WHICH COMPRISES (A) AN ACTIVE MEDICAL INGREDIENT AND (B) A PRE-GELATINIZED STARCH IN AN AMOUNT OF 10 TO 90% BY WEIGHT, SAID PRE-GELATINIZED STARCH BEING PREPARED BY PRE-GELATINIZING A CHEAP AND STABLE USUAL STARCH DURING THE PROCEDURE FOR FORMULATION. THIS INVENTION ALSO PROVIDES A METHOD FOR PREPARING THE SOLID PHARMACEUTICAL FORMULATION.