Ki seems to be a quite useful value. If Km describes the likelihood for a reaction proceed forward, then Ki can help predict competitive inhibition. The higher the Ki, the greater the inhibition. The Ki values for isoniazid, fluconazole, and diltiazem are 73, 15, and 2 respectively. This might lead one to expect that a patient taking diltiazem for high blood pressure might experience hypotensive episodes when initiating isoniazid therapy since isoniazid has a higher Ki, binds more readily and prevents the metabolism of diltiazem, thus raising its levels.