As a common cardiovascular drug, the main effect of Danshen Drops is to dilate blood vessels, and most people can take it without any obvious side effects. If the blood pressure is low or severely hypotensive, the cardiovascular system of the patient will be significantly dilated after taking Danshen Drops. The small venous system around the body will also be dilated, so a large amount of blood will be retained, and the patient’s arterial blood pressure will thus drop significantly, and there is even a risk of shock. Therefore, it is not the case that patients with chest distress can take salvia drops. In patients with low basal blood pressure, taking salvia drops can aggravate the distress and even coma. In addition, patients who have frequent throbbing headaches or tension headaches are also not suitable for taking Salvia Drops, because Salvia Drops dilates the arteries of the brain while dilating the blood vessels of the heart. Dilating the arteries in the brain will aggravate the severity and frequency of throbbing headache and tension headache attacks, and therefore such patients are not suitable for taking Salvia Drops.