A dry cough in heart patients is frequently a side effect of common heart medications, particularly ACE inhibitors (like lisinopril). Additionally, a cough can sometimes signal fluid buildup in the lungs from worsening heart failure. Do not take over-the-counter cough remedies without approval; many contain decongestants that can dangerously elevate blood pressure or strain your heart. Please contact your doctor so they can review your medications, examine your lungs, and safely prescribe the correct treatment.