An Eight-week Randomized,Double-blind Study to Evaluate the Efficacy and Safety of Fixed-dose Combinations of T80+A5 Versus A5 Monotherapy in Patients With Hypertension Who Fail to Respond Adequately to Treatment With A5 Monotherapy

8 Week Randomised Double-blind Study to Compare the Efficacy and Safety of Telmisartan 80mg+ Amlodipine 5 mg vs. Amlodipine 5mg Monotherapy in Patients With Hypertension Who Fail to Respond Adequately to Treatment With Amlodipine 5mg Monotherapy

The primary objectives of this trial is to demonstrate that the fixed-dose combination of telmisartan 80mg plus amlodipine 5mg (T80/A5) is superior to amlodipine 5mg (A5) in reducing seated trough diastolic blood pressure (DBP) at 8 weeks.

Inclusion criteria:

1. diagnosis of essential hypertension
2. failure to respond adequately to six weeks treatment with amlodipine 5 mg monotherapy
3. provision of written informed consent

Exclusion criteria:

1. clinical conditions which, in the opinion of the investigator, would not allow safe completion of the protocol and safe administration of telmisartan and amlodipine for the planned duration of this trial (e.g. populations where labeling of either product recommends against its utilization)