The Effects on Blood Pressure Control, Pulse Wave Velocity, as Well as Safety and Tolerability of Felodipine Sustained Release in Chinese Patients.
Condition: Hypertension
MeSH terms: Hypertension
Study type: Interventional

Summary: 
      The purpose of this study is to evaluate the effects on blood pressure control, pulse wave
      velocity, as well as safety and tolerability of felodipine single or combine with other drugs
      in Chinese Hypertension patients.
    

Detailed description: 
      In this study, investigators will choose male and female subjects aged between 35 and 79
      years old with mild to moderate essential hypertension. At first 2 weeks, all patients will
      use felodipine 5mg daily. If the blood pressure dosen't meet the target (140/90mmHg), they
      will be randomized into metoprolol, lisinopril or hydrochlorothiazide combination groups for
      another 4 weeks therapy. After that, if the blood pressure has still not met the target,
      up-titrate the felodipine into 10mg, followed by a 4 weeks therapy. And if the blood pressure
      is still not met the target after that, up-titrate the combine drugs into maximum dosage. The
      whole treatment duration is 14 weeks.

      The primary outcome is to evaluate the percentage of subjects reaching blood pressure target
      (defined as < 140 / 90 mmHg) after 14 weeks treatment with felodipine sustained release in
      combination with metoprolol, lisinopril or hydrochlorothiazide.
    

Intervention name(s): Felodipine tablet (Plendil) alone; Felodipine tablet (Plendil)+Hydrochlorothiazide; Felodipine tablet (Plendil)+Metoprolol tablet (Betaloc ZOK); Felodipine tablets (Plendil)+Lisinopril (Zestril)
Intervention type(s): Drug; Drug; Drug; Drug
Intervention description(s): Felodipine sustained release tablet single drug therapy (1st week- 2nd week) Eligible subjects will first take felodipine tablet 5mg, once daily, orally for 2 weeks. If blood pressure is controlled after 2 weeks, then the subjects will continue the treatment until the end of primary therapy stage (14th week).; Step 1: Eligible subjects will first take felodipine tablet 5mg, once daily, orally for 2 weeks.
If blood pressure is not controlled after 2 weeks, then the subjects will go to Step 2: Felodipine sustained release tablet 5mg once daily combined with hydrochlorothiazide 12.5mg, once daily. If blood pressure is not controlled after 4 weeks, then the subjects will go to Step 3: The dosage of felodipine sustained release tablet will be escalated to 10mg, once daily, while the dosage of the combined drug remains the same. If blood pressure is not controlled after 4 weeks, then the subjects will go to Step 4: The dosage of felodipine sustained release tablet keeps 10mg, once daily, while the dosage of different combined drug is doubled.; Step 1: Eligible subjects will first take felodipine tablet 5mg, once daily, orally for 2 weeks.
If blood pressure is not controlled after 2 weeks, then the subjects will go to Step 2: Felodipine sustained release tablet 5mg once daily combined with metoprolol succinate prolonged-release tablet (Betaloc ZOK) 47.5mg , once daily. If blood pressure is not controlled after 4 weeks, then the subjects will go to Step 3: The dosage of felodipine sustained release tablet will be escalated to 10mg, once daily, while the dosage of the combined drug remains the same. If blood pressure is not controlled after 4 weeks, then the subjects will go to Step 4: The dosage of felodipine sustained release tablet keeps 10mg, once daily, while the dosage of different combined drug is doubled.; Step 1: Eligible subjects will first take felodipine tablet 5mg, once daily, orally for 2 weeks.
If blood pressure is not controlled after 2 weeks, then the subjects will go to Step 2: Felodipine sustained release tablet 5mg once daily combined with Lisinopril (Zestril) 10mg, once daily. If blood pressure is not controlled after 4 weeks, then the subjects will go to Step 3: The dosage of felodipine sustained release tablet will be escalated to 10mg, once daily, while the dosage of the combined drug remains the same. If blood pressure is not controlled after 4 weeks, then the subjects will go to Step 4: The dosage of felodipine sustained release tablet keeps 10mg, once daily, while the dosage of different combined drug is doubled.
Intervention MeSH terms: Metoprolol; Felodipine; Hydrochlorothiazide; Lisinopril
Allocation: Randomized
Intervention model: Parallel Assignment
Masking: None (Open Label)