Treatment of coronary heart disease, including:- chronic stable angina pectoris (effort angina), - unstable angina pectoris: - aggravated angina, resting angina, vasospastic angina (Prinzmetal angina) - post heart-attack angina in patients without heart failure, when adrenergic beta-blockers are contraindicated. Prevention of ventricular fast heart rate disorders not controlled by tonic-cardiac glycosides or beta-blockers (for example supraventricular paroxysmal tachycardia, atrial fibrillation/ flutter with rapid ventricular response, except for Wolff-Parkinson-White syndrome.) Moderate to mild essential hypertension