Hello! Tell or Say please, whether necessarily priniamt postinor at once...

[alina]

Hello!
Tell or Say please, whether necessarily priniamt postinor at once after. Whether It is possible to accept "up to"?
And more a question. As quickly start to operate or work (COOK). I never used (COOK) and I do not know when it is possible to be uverenoj that tablets already I operate or work. At once or it is necessary to wait.

[Maljarskaja M.M.]

postinor - the first tablet within 72 hours after (up to it is not necessary), the second through 12 chsov after peraoj. If to start to accept the COOK from first day of a menses they start to operate or work in this cycle, but 2 more weeks it is necessary to be protected by a condom.