Here is the design of a clinical trial:

Official Title: Treatment of Early Hypertension Among Persons Living With HIV in Haiti

Included conditions:
- HIV/AIDS
- Pre Hypertension

Study Armgroups:
- {'label': 'Intervention (Early hypertension)', 'type': 'EXPERIMENTAL', 'description': 'Participants randomized to the early HTN treatment arm will initiate 5mg daily of amlodipine immediately, increasing to 10 mg if SBP \\>130 mmHg after 1 month.', 'interventionNames': ['Drug: Amlodipine 5mg']}
- {'label': 'Standard of Care', 'type': 'NO_INTERVENTION', 'description': 'Participants randomized to the SOC arm will not be initiated on any medications initially. They may be initiated on amlodipine only if they develop HTN (SBP ≥140 or DBP ≥90 mm Hg).'}

Interventions:
- {'type': 'DRUG', 'name': 'Amlodipine 5mg', 'description': "Amlodipine, Haiti's first-line antihypertensive medication, will be administered to the intervention group.", 'armGroupLabels': ['Intervention (Early hypertension)'], 'otherNames': ['Norvasc']}

Primary Outcomes:
- {'measure': 'Change in Mean Systolic Blood Pressure (SBP)', 'timeFrame': 'Baseline, 12 months'}

Please estimate the sample size based on the assumption: 
80% power with alpha 0.05, conservative correlation among measurement of 0.95, standard deviation of BP at each time point = 25 mmHg
Power and sample size calculations
        With a sample of 250 participants across both arms and 8 time points for BP measurements for each participant, we have 80% power with alpha 0.05 to detect a difference in change in SBP of 4 mmHg or more between the study arms at 12 months (assuming consistent difference across time and a conservative correlation among measurement of 0.95, standard deviation of BP at each time point = 25 mmHg) [30]. We will present summary statistics (e.g., mean and SD of pre, post, and difference within and between arms).