How Long Till Birth Control Is Effective. When used properly birth control shots like Depo are extremely effective. The progestin-only pill takes 48 hours to become effective and the combination pills around 7 days at the most. It contains copper. How long after starting the pill for the first time does it take for it to become 99 effective in your body.
1 doctor answer 3 doctors weighed in 90000 US. It depends on the type of pill you take and when you start taking it in your cycle. You can start the combination pill at any time. When first starting the birth control shot you will want to wait seven days for the hormones to kick in. What birth control methods take the shortest and longest time to work. This way protection from pregnancy starts right away.
It depends on whether youre taking combination pills or progestin-only pills.
It contains copper. You can start the combination pill at any time. If implanted within the first 5 days of your period it takes effect right away. The second method can start anytime within the first 7 days after you start your menstrual period. It depends on the type of pill you take and when you start taking it in your cycle. If you have the shot administered during the first half of your menstrual cycle which is within the first five days the shot may be effectively immediately.