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.
Warfarin, digoxin, asprin and statins. In addition to the triple combination of diuretics, ACE inhibitors and beta-blockers (see 'Beta-blockers, ACE inhibitors, diuretics and aldosterone antagonists') several drugs are commonly prescribed to help relieve symptoms of heart failure.