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Does plan b work every time?

You can take Plan B more than once in a cycle if needed, or multiple times a year without worry. There are no health risks to taking this commonly used hormone more than once. The effectiveness may be reduced with multiple uses; however, it is still better to use Plan B than not in case of a contraceptive failure.

How reliable is Plan B? 1 doctor agreed: Very: Plan b taken within 1 hours is going to have an effectiveness rate of around 80-85%. That is if a woman were ovulating at that time, she would have 80-85% chance of preventing pregnancy.

What are the side effects of Plan B? Common side effects of Plan B include: nausea, vomiting, abdominal or stomach pain, tiredness, dizziness, changes in menstrual periods, breast pain or tenderness, diarrhea, or headache.

How effective is Plan B? If taken within 72 hours of unprotected sex, Plan B is 89 percent effective at preventing pregnancy, according to Planned Parenthood. The drug is less effective after three days, but can work up to five days after unprotected sex.

How often does Plan B work? Plan B will usually work if it is taken within 72 hours after unprotected intercourse. Women can also boost its efficacy by taking another pill twelve hours later the first dose they took. However, the effect of Plan B will greatly depend on how early you took the first dose.

How bad is Plan B?

How bad is Plan B? Short answer. Plan B is safe for most. Only in rare cases – in which a person may be allergic, hypersensitive, or have overdosed – is the pill harmful. Plan B should also be used only in emergency situations, as it is not a form of birth control.

How effective is Plan B one-step? Plan B OneStep is most effective the sooner it is started. When taken as directed (within 72 hours of unprotected sex or contraceptive failure), Plan B OneStep is about 89% effective in reducing the chance of pregnancy.

How well does Plan B work? If taken within 72 hours of unprotected sex, Plan B is 89 percent effective at preventing pregnancy, according to Planned Parenthood. The drug is less effective after three days, but can work up to five days after unprotected sex.

How effective are Plan B pills? Plan B is typically effective in the first 72 hours and is 95% effective if taken within the first 24 hours of unprotected sex. If taken between 48 to 72 hours the effectiveness rate drops to 61%.