Effect of the Traditional Chinese Medicine Yufeng Ningxin in Patients With Hypertension

Secondary hypertension (including, but not limited to, renovascular hypertension, pheochromocytoma, primary aldosteronism, Cushing syndrome, aortic coarctation, or due to known history of moderate-to-severe obstructive sleep apnea);

Orthostatic hypotension (symptomatic or asymptomatic);

Participation in another hypertension-related clinical trial at enrollment or within 6 months prior;

Currently taking, taken within 30 days prior to randomization, or anticipated to receive during the study treatment period any medication or herbal supplement known to significantly affect blood pressure (with the exception of medications for the treatment of essential hypertension). These drugs include, but are not limited to: organic nitrates, glucocorticoids (excluding topical or inhaled corticosteroids), central nervous system stimulants (e.g., methylphenidate, dexmethylphenidate, amphetamines), estrogens, monoamine oxidase inhibitors, digitalis preparations, Chinese proprietary medicines (such as Tianma Gouteng Granules, Songling Xuemaikang Capsules, Yangxue Qingnao Granules), and herbal medicines (including Salvia miltiorrhiza, Uncaria rhynchophylla, Ginkgo biloba leaves, Prunella vulgaris, etc.);