Plan B is very safe . However , a person may go through side effect such as tiredness , vertigo , nausea , vomiting , breast pain , catamenial changes , and cramping .

A person can ease these side effects by submit anti - nausea medication and annoyance comforter . Using a warming pad can also help relieve low belly nuisance .

If a person experiences stark breadbasket pain , they need to touch a doctor .

A woman sitting with her eyes closed.

Common side effects

Plan B is avery safeand effective pattern of emergency contraception , and serious side effects are uncommon . However , a person may experience thefollowing :

What menstrual changes can a person expect?

Plan B can cause changes to a someone ’s next period . According toPlanned Parenthood , some people may experience the followers :

or else , some individuals may not experience any changes .

Can Plan B delay a person’s period?

Plan B can check a person ’s period . After taking this contraception , their time period may get in earlier or afterward than it usually does .

An individual ’s distinctive menstruation should repay by the next month . However , if it does not get in within 3 weeks of taking Plan B , it is authoritative to take a pregnancy mental test . Pregnancy is possible if there is a1 - weekdelay in a soul ’s period .

Can Plan B cause long-term side effects?

According to the United Kingdom’sNational Health Service ( NHS ) , there are no long - terminus side effects of take Plan B or other physical body of emergency brake contraception .

However , if a person takes Plan B or emergency contraception frequently , itcan causetheir period of time to become irregular and irregular .

Can Plan B affect a person’s ability to get pregnant in the future?

Plan Btemporarily delaysovulation , delaying or stopping the eggs ’s release from the ovary . This means that there is no egg for the spermatozoan to fertilize .

It does not stay in a person ’s system of rules or affect their power to believe in the future .

Are there any dangers to taking Plan B?

programme B isvery safe . A2020 systematic reviewof 47 articles found that most side force of take on levonorgestrel unwritten emergency birth control machine were not serious .

However , uncommon side effects are possible and may include :

More serious side event included :

Help is out there

If you or someone you know is in crisis and believe self-destruction or self - harm , please seek living :

If you ’re call on behalf of someone else , stay with them until help arrives . You may remove weapons or substances that can make harm if you could do so safely .

If you ’re not in the same menage , stay on the earphone with them until assistant make it .

Self-care after taking Plan B

A somebody can aid ease the side effects of take Plan B by :

When to call a doctor

A person needs to reach a doctor after take Plan B if they feel life-threatening belly pain sensation . spartan stomach pain could indicate that an ectopic pregnancy has take office .

It is also crucial to contact a doctor or pharmacist if a mortal puke within2 hoursof taking the medication . A person may need to take another dose if this occurs .

Summary

Plan B is a safe and effectual form of emergency contraception . However , a soul may experience some side effects , include dizziness , weariness , menstrual change , sickness , vomiting , and stomach pain .

Menstrual change can include spotting , heavier flow , or lighter periods . The period may also arrive earlier or later than usual . A individual ’s typical stop should take back by the next month .

If someone ’s period does not arrive after 3 weeks of train the medication , they need to take a pregnancy trial . soul may also be pregnant if their period arrives 1 week later than it usually would .