On the  long scale , one billion is 1 million million, or 1 and 12 zeroes (1,000,000,000,000). The long scale is still used in some European countries (France, for example). The UK switched to the short scale in 1970/71. On the  short scale , one billion is 1,000 million, or 1 and 9 zeroes (1,000,000,000).
The amount of vitamin K in your diet can affect the amount (dose) of. warfarin you need to take. Your medicine dose must be balanced with your. diet to allow the drug to work correctly. A few things to remember when taking warfarin: You want a medium or moderate amount of vitamin K in the foods you. eat.
Initiate therapy with the estimated daily maintenance dose (2-5 mg.). Elderly or debilitated patients often require low daily doses of warfarin (2-4 mg.). Patients are confused by alternating daily doses (e.g. 7.5 and 5.0 mg). Significant changes in INR can usually be achieved by small changes in dose (15% or less).