In high doses, digoxin increases sympathetic outflow from the central nervous system CNS. Furthermore, caution should be exercised when combining digoxin with any drug that may cause significant deterioration in renal function, since decline in glomerular filtration or tubular secretion may impair the excretion of digoxin. Due to farmacia acquistare lanoxin the considerable variability of these interactions, the dosage of digoxin should be individualized when patients receive these medications concurrently. Call your doctor at once if you have serious side effect such as: fast, slow, or uneven heart bloody or black, tarry blurred vision, yellowed or confusion, hallucinations, unusual thoughts or behavior. 48-year-old man with rheumatic mitral valve disease and atrial flutter fibrillation developed profound diaphoresis and malaise associated with serum digoxin level of. The beneficial effects of digoxin result from direct actions on cardiac muscle, as well as indirect actions on the cardiovascular system mediated by effects on the autonomic nervous system. Digoxin alleviates these symptoms by blocking the electrical conduction between the atria and ventricles, thus slowing ventricular contractions.