Digoxin toxicity is increased by all except:
Renal impairment
Hyperkalemia
Hypercalcemia
Hypomagnesemia
Hypokalemia increases the binding of digoxin to Na-k ATPase and enhances its toxicity. Hypokalemia decreases digoxin toxicity Diuretics also interfere with the action of digoxin (REF. Essentials of medical pharmacology KD TRIPATHI 8th Edition)
Cardiovascular system