Robitussin can lower blood pressure because it contains components that increase the elasticity of blood vessels, lower cholesterol, inhibit the rise of blood pressure, and have a hypotensive effect. However, clinically, rooibos is an adjunctive treatment, not a routine application of rooibos to lower blood pressure. Regular blood pressure lowering must also be through the relevant antihypertensive drugs, such as captopril, Irbesartan, etc. These antihypertensive drugs have a certain stability, so that the human body’s blood pressure within 24 hours to maintain a certain value, to prevent blood pressure too high, too low and problems. Robitussin antihypertensive has a disadvantage, that is, antihypertensive is not stable, easy to appear of the blood vessel elasticity changes, blood pressure changes are relatively large, will produce for the impact of the endothelium of blood vessels. Therefore, rooibos tea can be consumed in small amounts every day to assist in lowering blood pressure. In addition to lowering blood pressure, rooibos can enhance the body’s immunity, can be diuretic and swelling.