Continued treatment with large doses of calcium may produce response. An overdose of Calan can cause fluid buildup in the lungs, kidney problems, seizures, dangerously low blood pressure, and life-threatening heart problems such as slow or irregular heartbeat. When used concomitantly, inhalation anesthetics and calcium antagonists, gunstig isoptin kein rezept such as verapamil, should each be titrated carefully to avoid excessive cardiovascular depression. The material on this site is for informational purposes only, and is not substitute for medical advice, diagnosis or treatment provided by qualified health care provider.