To prevent having a period, can I use ordinary birth control pills or do I need special pills?

There are birth control pill regimens designed to prevent bleeding for three months at a time or for as long as a year. But it's possible to prevent your period with continuous use of monophasic birth control pills — pills with the same hormone dose in the three weeks of active pills. To prevent your period with these pills, don't take the inactive pills and start right away on a new pack.