Patients with diagnosed with an enlarged heart (cardiomyopathy) should stay away from antihistamines as they can cause heart rhythm problems. Patients who have been prescribed warfarin for treatment of their cardiomyopathy should also avoid taking aspirin and other drugs containing aspirin unless under a doctor's order.
Mayo Clinic advices that patients who have a pacemaker or an Implantable Cardioverter Defibrillator (ICD) device as a result of their cardiomyopathy should avoid medical treatments that emit radio, magnet, and electrical waves such as MRIs, shock wave lithotripsy, or therapeutic radiation.
Patients with enlarged hearts should maintain a healthy diet, control their blood pressure and stay away from abusing alcohol, cocaine tobacco to reduce the chances of developing heart failure, according to Drugs.com. Patients should also avoid caffeine, the Cardiomyopathy Association notes, since caffeine may cause rapid heart rhythms.
The Cardiomyopathy Association explains that there are a number of medication types are safe for patients diagnosed with an enlarged heart, including flu shots, iron supplements and cholesterol lowering drugs.
To check if specific prescriptions are in direct conflict, WebMD provides a drug interaction checker so that patients can double check that medications do not conflict with one another or with other existing conditions.