Telmisartan With or Without Hydrochlorothiazide in Patients With Mild-to-moderate Hypertension

An Eight Week Randomized, Double-Blind Study Comparing a Fixed Dose Combination of Telmisartan 80 mg Plus Hydrochlorothiazide 12.5 mg to Telmisartan 80 mg in Patients Who Fail to Respond Adequately to Treatment With Telmisartan 80 mg.