The bloodshot appearance is due to the irritation and dilation of the surface blood vessel in the eye. Other symptoms can accompany the red appearance, like itching, soreness, discharge and even blurred vision. These symptoms could indicate a more serious problem.
The list of possible medications or substances mentioned in sources as possibe causes of Heart block includes: 1  Beta-adrenergic blockers. 2  Digitalis. 3  Flecainide. Flecatab. 4  Flumadine. Quinidine. 5  Rimantidine. Tambocor.
Common types of drugs used to treat heart failure include: 1  Aldosterone inhibitors. 2  Angiotensin converting enzyme (ACE) inhibitors. 3  Angiotensin II receptor blockers (ARBs). 4  Angiotensin Receptor-Neprilysin Inhibitors (ARNIs). 5  Beta-blockers. 6  Blood vessel dilators. 7  Calcium channel blockers. 8  Digoxin. 9  Diuretics.