Hypersensitivity to Ivabradine or to any excipients; resting heart rate of <70 bpm prior to treatment; cardiogenic shock; acute myocardial infarction; severe hypotension (<90/50 mmHg); severe hepatic insufficiency; sick sinus syndrome; sino-atrial block; pacemaker-dependent; unstable angina; AV block of 3rd degree, heart failure which has recently become worse. Combination with strong cytochrome P450 3A4 inhibitors e.g., azole antifungals (ketoconazole, itraconazole), macrolide antibiotics (clarithromycin, oral erythromycin, josamycin, telithromycin), HIV protease inhibitors (nelfinavir, ritonavir) and nefazodone (see Pharmacokinetics under Actions and Interactions). Combination with verapamil or diltiazem which are moderate CYP3A4 inhibitors with heart reducing properties (see Interactions).