The objective of this trial is to demonstrate that the fixed dose combination of telmisartan 40 mg and HCTZ 12.5 mg is superior to the monocomponent of telmisartan (Micardis, Gliosartan, Kinzal, Kinzalmono, Predxal, Pritor, Samertan, Telmisartan) 40 mg in patients with essential hypertension who fail to respond adequately to telmisartan monotherapy.
This is a multi-centre, randomised, double-blind, double-dummy, active-controlled, parallel-group study in patients with essential hypertension who fail to respond adequately to telmisartan (Micardis) 40 mg monotherapy. After a screening and a 2-week washout period (screening period), the patients will enter 4-week open-label run-in period with telmisartan (Micardis) 40 mg monotherapy to assess eligibility. The study will be terminated for those who have responded to telmisartan (Micardis) 40 mg monotherapy at the end of 4-week open-label run-in period with telmisartan (Micardis) 40 mg monotherapy (mean seated DBP \< 90 mmHg). About 200 patients not responding adequately to telmisartan (Micardis) 40 mg monotherapy will be randomised and treated for 8 weeks with once-daily administration of either telmisartan (Micardis) 40 mg or a fixed dose combination of telmisartan 40 mg and HCTZ 12.5 mg (double-blind treatment period). Study Hypothesis: The hypothesis is that the fixed dose combination of telmisartan 40 mg and HCTZ 12.5 mg is superior to the monocomponent of telmisartan (Micardis) 40 mg in pat ient with essential hypertension who fail to respond adequately to telmisartan monotherapy. Comparison(s): For the primary comparison the change from baseline in mean stated trough DBP at the end of the 8-week double-blind treatment will be expressed.
Study Type
INTERVENTIONAL
Allocation
RANDOMIZED
Purpose
TREATMENT
Masking
DOUBLE
Enrollment
218
Boehringer Ingelheim Investigational Site
Sapporo, Hokkaido, Japan
Boehringer Ingelheim Investigational Site
Shinjuku-ku, Tokyo, Japan
Change in mean seated trough DBP after eight weeks of the double-blind treatment period
Time frame: after 8 weeks
Change in seated trough SBP
Time frame: after 8 weeks
Seated DBP control rate (seated trough DBP < 90 mmHg)
Time frame: after 8 weeks
Seated DBP response rate V2 (seated trough DBP < 90 mmHg and/or reduction from pseudo-baseline in seated trough DBP ≥ 10 mmHg)
Time frame: after 8 weeks
Seated DBP response rate V3 (seated trough DBP < 90 mmHg and/or reduction from pseudo-baseline in seated trough DBP ≥ 10 mmHg)
Time frame: after 8 weeks
Seated SBP response rate V2 (seated trough SBP < 140 mmHg and/or reduction from pseudo-baseline in seated trough SBP ≥ 10 mmHg)
Time frame: after 8 weeks
Seated SBP response rate V3 (seated trough SBP ≥ 140 mmHg at baseline and seated trough SBP < 140 mmHg and/or reduction from baseline in seated trough SBP ≥ 10 mmHg)
Time frame: after 8 weeks
Change in trough pulse pressure
Time frame: after 8 weeks
Plasma concentrations of Telmisartan and HCTZ
Time frame: Day 56
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