The present disclosure relates generally to rapid-release pharmaceutical dosage unit tablets containing a drug that is an inhibitor of the mitogen-activated protein kinase enzyme, a filler and a disintegrant, and to processes for forming the tablets. More specifically, the present disclosure relates to pharmaceutical dosage unit tablets containing cobimetinib, a least one filler, at least one lubricant and at least one disintegrant, and to methods for preparing the tablets from granules formed by dry granulation.