Cardiovascular health: it has been used historically to treat heart conditions, including as a treatment for heart failure, irregular heartbeat, and hypertension. diuretic properties: it is sometimes used to promote urination, which can help in cases of water retention. anti-inflammatory: apocynum is believed to have anti-inflammatory properties and may be helpful in treating conditions like arthritis. other uses: it has also been used as a general tonic and to support the respiratory system.