Eligibility Module
The Eligibility Module contains detailed information about who can participate in the clinical trial. This includes eligibility criteria, age restrictions, gender requirements, healthy volunteer status, and study population descriptions, helping researchers understand who is eligible to participate in the study.
Eligibility Module path is as follows:
Study -> Protocol Section -> Eligibility Module
Eligibility Module
Ignite Creation Date:
2025-12-26 @ 10:57 AM
Ignite Modification Date:
2025-12-26 @ 10:57 AM
NCT ID:
NCT03472508
Eligibility Criteria:
Inclusion Criteria for run-in period:
* （1）≥ 45 years old;
* （2）A diagnosis or previous diagnosis of essential hypertension, including anyone currently taking antihypertensive drugs; or for those who have not taken antihypertensive drugs within the last 2 weeks, two consecutive examinations were conducted at least one day apart, and both sitting blood pressure (mean value of 3 measurements) met the following criteria: diastolic blood pressure (DBP) ≥90 mmHg or systolic blood pressure (SBP) ≥140 mmHg (the second blood pressure was measured at V1);
* （3）If a study participant is a woman of childbearing age, she agrees to use a reliable contraceptive method during the trial;
* （4）Voluntarily participates and has signed an informed consent form.
Inclusion Criteria for Double-Blind Treatment Period:
* （1）Completed MTHFR C677T gene polymorphism detection in run-in period or MTHFR C677T genotype already known in advance;
* （2）Exhibited good tolerance to enalapril and good overall medication compliance (\>80%) in run-in period or previously exhibited good tolerance and adherence to ACEI drugs in previous medication history.
* （3）Voluntarily continues to participate in this study.
Exclusion Criteria:
Participants meeting any of the following criteria may not participate in this study:
* （1）Women who are pregnant and/or lactating; or women who intend to conceive within a year;
* （2）History of allergies to enalapril, folic acid or other components of the compound drug;
* （3）History of adverse reactions or intolerance to enalapril or other ACE inhibitors, or drugs or supplements containing folic acid;
* （4）Diagnosis or suspicion of secondary hypertension;
* （5）Known serious medical conditions, including: Cardiovascular: patients with clinically diagnosed cardiac dysfunction (NYHA class III and above), hypertrophic obstructive cardiomyopathy, clinically significant valvular heart disease, acute coronary syndrome within the last 3 months, or percutaneous coronary intervention (PCI), or coronary artery bypass graft (CABG); or abnormal pre-enrollment ECG test results with clinically significant arrhythmias (atrial flutter, atrial fibrillation, grade II-III atrioventricular block, etc.); Digestive: a previous diagnosis of various types of viral hepatitis that are still in the active phase; abnormal pre-enrollment liver function test results (ALT, AST, GGT, TBIL, or DBIL 3 times higher than normal, ALB ≤ 30g/L); gastrectomy and/or gastrojejunostomy; gastrointestinal dysfunction; Urinary: pre-enrollment serum creatinine greater than 200μmol/L; clinical diagnosis of renal artery stenosis, isolated kidney, kidney transplantation and/or other diseases; Endocrine: type 1 diabetes or uncontrolled type 2 diabetes (fasting blood glucose above 11.1 mmol/L at pre-enrollment); previous diagnosis of hyperthyroidism and failure to correct; Respiratory: pulmonary heart disease; chronic obstructive pulmonary disease; Neuropsychiatric: recent transient ischemic attack or stroke (within the last 3 months); peripheral or severe autonomic dysfunction; mental or nervous system dysfunction, inability to express desire; known drug or alcohol dependence; Malignancy, malnutrition, hematopoietic disorders and other serious diseases.
* （6）Significant signs of abnormalities as seen in laboratory tests or physical characteristics, which, at the discretion of the investigators, indicates that the patient is experiencing a serious illness or, may affect the observation and evaluation of the drug's efficacy or adverse events, or renders the patient unsuitable for participating in this study;
* （7）Patients currently taking folate, B12, or B6, or any compounds containing them, who express an inability or a refusal to stop usage;
* （8）Regular usage of folic acid supplements or compounds containing folic acid in the past 3 months;
* （9）Participation in a clinical trial for a drug that has not yet been officially approved for marketing within one month prior to the first visit.
Healthy Volunteers:
False
Sex:
ALL
Minimum Age:
45 Years
Study:
NCT03472508
Study Brief:
Protocol Section:
NCT03472508