Could a single pill replace two for high blood pressure?

Copied word for word from the study's registry entry, so the wording is the study team's rather than ours.

Inclusion Criteria: * Study participants aged 18 to 60 years (inclusive of 18 and 60 years), both male and female * Body weight not less than 50 kg. Body Mass Index (BMI) = weight (kg) / height\^2 (m\^2). BMI must be within the range of 19 to 26 kg/m\^2 (inclusive of the limit values) * The study participant is able to communicate well with the research staff, fully understand the purpose and requirements of this trial, voluntarily participate in the clinical trial, and sign a written informed consent form * The study participant or their partner has no plans for pregnancy, sperm donation, or egg donation during the study period and for 3 months after drug administration, and must agree to use at least one acceptable effective contraceptive method * During the screening period: 110 mmHg ≤ seated systolic blood pressure (SBP) \< 140 mmHg, 65 mmHg ≤ seated diastolic blood pressure (DBP) \< 90 mmHg, and no orthostatic hypotension. Exclusion Criteria: * Those who smoked more than 5 cigarettes per day on average in the 3 months prior to the trial and are unable to quit smoking during the trial period. * Pregnant or breastfeeding women, or female study participants of childbearing potential with a positive blood pregnancy screening. * Known allergic reaction to angiotensin II receptor antagonists (such as sacubitril/valsartan sodium, alisartan ester, losartan, valsartan) and calcium channel blockers (such as nifedipine, amlodipine), or their excipients; or allergic constitution (multiple drug and food allergies). * Alcoholics or those who frequently consumed alcohol within the 3 months prior to screening, i.e., consuming more than 14 standard alcohol units per week (1 unit alcohol = 360 mL beer or 45 mL spirits with 40% alcohol content or 150 mL wine), or those with a positive alcohol breath test, or those unable to stop using any alcohol-containing products during the trial period. * Those who donated blood or experienced significant blood loss (\>400 mL), used blood products, or received a blood transfusion within the three months prior to screening. * Those who have undergone surgery within 3 months prior to screening or plan to undergo surgery during the study period, or subjects with a history of surgery affecting drug absorption, distribution, metabolism, or excretion. * Those who have been vaccinated within 3 months prior to screening. * History of hypotension, syncope, needle fainting, swallowing difficulties, any gastrointestinal disease affecting drug absorption, or any history of conditions increasing hemorrhagic risk, such as acute gastritis or gastroduodenal ulcers. * Use of any drug that alters hepatic enzyme (CYP3A4) activity or inhibitors of transporters (OAT1/3, OATP1B1/3) within 28 days prior to screening. * Use of any prescription drugs, over-the-counter medications, vitamin products, or herbal remedies within 14 days prior to screening. * Participation in any drug clinical trial and administration of any other investigational drug, or use of investigational products, within 3 months prior to taking the study drug. * Clinically significant abnormalities in vital signs, physical examination, 12-lead electrocardiogram (ECG), or laboratory tests (including complete blood count, urinalysis, blood biochemistry, coagulation profile, and four infectious disease markers) at screening. * Any other disease or medical history considered by the investigator as unsuitable for participation in this study, such as disorders of the central nervous, cardiovascular, digestive, respiratory, urinary, hematopoietic, immune systems, psychiatric conditions, or metabolic abnormalities. * Consumption of chocolate, any caffeine-containing, or xanthine-rich foods or beverages within 48 hours prior to taking the study drug. * History of drug abuse or substance abuse, or a positive urine drug screen at screening. * Those with special dietary habits who cannot comply with the unified dietary requirements, or those with lactose intolerance (e.g., history of diarrhea after drinking milk). * Any other reason considered by the investigator as unsuitable for enrollment.