plan b is to prevent implantation of the fertilized egg into the uterine wall. in order for this to work effectively it must be taken within 72 hours of the unprotected intercourse. if you are purchasing more than one pack of plan b to use more than once per month then you should consider using another form of contraception or consider taking birth control pills which many pharmacies have on their discounted program lists.
can i safely take the plan b one step pill two times in one week?