Mosonidine has antihypertensive properties and works to treat mild to moderate essential hypertension. Mosonidine is a new type of central antihypertensive drug, selective agonist with high affinity for imidazoline II receptor, and exerts antihypertensive effect after binding to central imidazoline II receptor in vivo. Clinically, this drug is commonly used for mild to moderate essential hypertension. Taking this drug may cause symptoms such as dry mouth, tiredness, headache, dizziness, insomnia, weakness and weakness, rarely produce gastrointestinal discomfort, and individually have skin allergic reactions. Attention to allergic to this product, pregnant and lactating women, children under 16 years of age, patients with severe cardiac insufficiency, patients with unstable angina pectoris, patients suffering from severe liver disease, patients with epilepsy, patients with glaucoma, patients with depression is prohibited. This drug needs to be taken under the guidance of a professional doctor to take the drug, not unauthorized use of the drug to avoid adverse consequences.