What is a good way to take plan b pill ?

Emergency bc: Plan b and other generic brands of emergency bc are intended to be taken as directed within 72hr of condom breaking/slipping off or unplanned sex or other bc failure. May have slight nausea/occasional vomiting/delayed period.

Right away.: Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregnancy by up to 95% if used within 24 hours. It continues to reduce the risk of pregnancy up to 120 hours (5 days) after unprotected sex, but is less effective as time passes.