This is a real-world medical entrance exam question, please give the true answer based on the question and selection. Topic name: All India exam, Subject name: Microbiology
The maintenance dose of digoxin 
Select and explain. 
A. 0.25 mg/day, B. 2.5 mg/day, C. 25 mg/day, D. 250 mg/day
A: 0.25 mg/day
Answer: A: 0.25 mg/day 
Explanation: Slow digitalization: Here maintenance dose of Digoxin (average 0.25 mg/day) is given from the beginning. Full response takes 5-7 days to develop, but the procedure is much safer. In case an adequate response is not seen after I week, increase the dose to 0.375 and then to 0.5 mg after another week.Rapid oral digitalization: Here Digoxin 0.5 - 1.0 mg stat dose given followed by 0.25 mg every 6 hours with careful monitoring and watch for toxicity till response occurs - generally takes 6-24 hours (total dose 0.75 - 1.5 mg). This is seldom practised now.Emergency digitalization: It is practised rarely now, only as a desperate measure in CHF or in atrial fibrillation. Digoxin 0.25 mg followed 0.1 mg hourly is given by slow IV. Injection with close ECG, BP and CVP monitoring till response occurs (2-6 hours, total dose 0.5 - 1.0 mg)