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A 40-year-old member asked:

how long after taking plan b until the side effects start?

1 doctor answer1 doctor weighed in
Dr. Yash Khanna
Family Medicine 57 years experience
Within 24 hours: Some side effects may start as early as 1 hour like vomiting and headache, and allergic reaction to the medicine and others may come within 24 hours and mestrual changes if any at next period but not every one who takes Plan B gets the all or some of the side effects.

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A 47-year-old member asked:

Is Plan B safe?

2 doctor answers13 doctors weighed in
Dr. Dennis Higginbotham
Obstetrics and Gynecology 30 years experience
Yes: Plan b is safe and effective - it works over 85% of the time if used within 72 hours (3 days) of unprotected sex and about 80% if used within 120 hours (5 days). There are few complications, but there are side effects occasionally, like nausea and headache.
A 31-year-old member asked:

Could you describe how do you use plan b?

2 doctor answers6 doctors weighed in
Dr. Meena Khandelwal
Obstetrics and Gynecology 35 years experience
Just take the 1 pill: Soon after unprotected sex, take the 1 pill. Do not use this as the method of birth control - it is only for emergency in case of an oopsy! try to use condoms or birth control pills or iud or injectables etc.
A member asked:

Is it bad to take Plan B once in awhile?

1 doctor answer1 doctor weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
It is far better: to use a consistent form of birth control than to use emergency contraception repeatedly.
A 18-year-old female asked:

How long you should wait to take plan b?

2 doctor answers2 doctors weighed in
Dr. Meena Khandelwal
Obstetrics and Gynecology 35 years experience
As soon as possible: If you do not want to get pregnant, take it as soon as possible after unprotected sex but definitely within 3days or is useless.
Edgewater, NJ
A 18-year-old male asked:

What medicines should I not be taking in order to take plan b?

1 doctor answer3 doctors weighed in
Dr. Heidi Fowler
Psychiatry 25 years experience
Agree w Dr. Collins: No absolute contraindications. Plan B One-Step is up to 89 % effective when taken within 72 hours (3 days) after unprotected sex. It can reduce chance of pregnancy by up to 95% if used within 24 hours. It continues to reduce the risk of pregnancy up to 120 hours (5 days) after unprotected sex, but is less effective as time passes.

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Last updated Jun 30, 2014

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