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.
Identified metabolites of warfarin include dehydrowarfarin, two diastereoisomer alcohols, and 4'-, 6-, 7-, 8-, and 10-hydroxywarfarin. The CYP450 isozymes involved in the metabolism of warfarin include CYP2C9, 2C19, 2C8, 2C18, 1A2, and 3A4.