The only safe methods of ending your monthly period are by birth control. There are any shot type birth controls which stop the period as well as pills that are taken all 4 weeks of the month instead of 3 with a week of placebo or iron pills. You doctor may also recommend starting a new pack of pills on the 4th week of a pill pack instead of taking that last placebo/iron week of pills. Be sure to speak with your doctor before you attempt to alter your menstrual cycle.
Menstruation is an involuntary action by the body; it cannot be stopped once it has started. However, if there is a reasonable cause to stop the menstruation, your doctor can give you medication for this purpose.
The only way a menstrual period can be stopped is by using hormones. These hormones can be found in birth control pills. You can stop or delay your period by using birth control medication. For example, if you don’t want to get your period, skip the placebo pills and start taking the Day 1 pill of your next pack. Of course, this isn’t recommended, and you should always talk to your doctor before using medication for off-label purposes.
To stop your period after it has started, you need to see your doctor. Your doctor can give you a pill that will help to stop your period. You can also try taking aspirin, which will cause you to bleed for a few more hours, but should substantially slow your period fairly quickly.