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Plan B One-Step and Bloating: What Users Say

Bloating: mentioned by 205 users (7.3%)

Based on user experiences from 2,799 Plan B One-Step reviews, the following table shows the most commonly mentioned side effects.

All user comments are moderated by Drugs.com. Each review is verified for relevance and screened for inappropriate content. Side effects are user-reported and not clinically verified.

cramps 30.3%
nausea 22.7%
sore breasts 14.3%
headaches 10.6%
spotting 9.1%
bleeding 8.3%
bloating 7.3%
fatigue 6.9%
tiredness 6.6%
dizziness 5.9%

Reviews for Plan B One-Step

Commonly mentioned side effects
  • Aan...
  • October 11, 2020

For Emergency Contraception "I was very dumb and was not using condoms or BC. On my day of ovulation, I was convinced he didn't pull out efficiently. The next morning, I took Plan B. The initial effects were not bad at all. My stomach felt a little off but barely noticeable. 5 days later, I started spotting brown which then turned red for about 6 days. I knew this was not my period and apparently this is common. My stomach was bloated all month, and I had really weird cramping all month. This pill creates similar side effects as if you were pregnant, so really try not to think about it because it's going to freak you out. After 2 weeks of not getting my period, I got a negative pregnancy test but my period still wasn't there. My period ended up coming 21 DAYS LATE. My best advice is to trust this pill and try not to google anything. Your mind will really get the best of you and convince you you're pregnant."

9 / 10
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  • Anonymous
  • September 11, 2020

For Emergency Contraception "Okay, so like other people, I promised I’d write a review if this worked. I’m 19. I’ve taken Plan B about 6 times total, and it has worked every time. I had unprotected sex multiple times on the night of the 13th of August and was fertile, supposed to ovulate on the 14th. I took Plan B on the 14th around 1 pm. For the rest of August, I was insanely moody, bloated, crampy, fatigued, had frequent urination, was acne-prone, and EXTREMELY NAUSEOUS. So basically every pregnancy symptom. I was expected to get my period on the 31st of August, but it didn’t come till today, September 11th, so almost 12 days late. I had freaked myself out and made myself so anxious thinking I was pregnant that I delayed my period even more. I also spent $60 on taking pregnancy tests. I know it’s so hard not to stress, but the more you do, the later you make it. Also, Plan B can make it late on its own. STAY STRONG GIRLS. Everything will work out fine. Reading these reviews really helped me. Just breathe. Good luck!"

10 / 10
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  • Anonymous
  • May 8, 2021

For Emergency Contraception "I promised that I’d write a review if it worked so here I am. GIRLS, PLEASE DON'T STRESS OUT! I was on the same boat as all of you, I was stressing out for so long and tried searching everything up, and all that came back to me was pregnancy. I took 4 pregnancy tests & a blood test, and they all came back negative. I got my period 12 days late! The whole month after I took Plan B, I was so moody, cramping for almost the entire month. I was crying every day for no reason, bloating, feeling gassy, and frequent urination, but just because PMS and pregnancy symptoms feel exactly the same DOES NOT MEAN YOU'RE PREGNANT. PLEASE, don’t search anything up on the internet because you’re going to get more anxious thinking you’re pregnant, and trust me, it’s not worth it. The pill works beautifully, girls, as long as you took it within 1-48 hours of having sex, you are okay ❤️❤️❤️ Stay safe and stay off the internet xxxx"

10 / 10
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Frequently asked questions

  • Anonymous
  • April 14, 2021

For Emergency Contraception "I'm going to start off by saying I’m young enough to still be living at home and getting my mama to buy me food and clothes. So I had sex on ovulation day, me being young, I didn’t know it’s easy to get pregnant on that day. So I was scared and took the Plan B about 26-28 hours later. I did research on Plan B and it said it’s best to take it within the 24-hour range, and it’s not effective on ovulation day. So I freaked out, didn’t know how I would tell my mama if I became pregnant. Anyway, I found this website and saw all the amazing reviews. I read at least the same reviews 4 times a day. I didn’t get symptoms days later like everyone else, a week later, I had cramps, lower back pain, constipation, I was bloated, and I got no bleeding in between, but it all happened at once. I looked on the internet and saw PREGNANCY. I decided to wait and relax my mind, and my period came a day early. I prayed, but these cramps are ironic. That’s better than being pregnant. Ladies, IT WORKS EVEN DURING OVULATION."

10 / 10
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  • Anonymous
  • July 29, 2020

For Emergency Contraception "Okay, so I know many females might be scared and paranoid - accidents happen. BUT please trust the Plan B pill! It really works! The last thing you should do is start googling! That was my biggest mistake. They say it doesn’t work during ovulation, but I had sex the DAY I was ovulating. Just trust the pill, ladies! So, I wanted to put my story out here because it was my first time taking Plan B. Me and my boyfriend had unprotected sex, and he didn’t pull out immediately. We were both scared, and we agreed that he would buy the Plan B. Again, I’m young, so I didn’t know what was going to happen. I took the pill within 10 hours, and I was nauseous, and I had cramps every other day come and go for 2 weeks. It’s a waiting game. I felt bloated, I used the restroom frequently, and I was stressing. I got my period today (after 2 weeks), and it's the worst, but hey, I’m not pregnant :)"

10 / 10
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  • Meg...
  • December 15, 2020

For Emergency Contraception "I am leaving a review because two weeks ago I was on here reading reviews just to ease my mind. On December 3rd, went on a second date with a guy, and got a little too drunk. Had sex a couple of times and didn't realize the condom broke and he came inside. It was 2 am so I went first thing the next morning to get Plan B. I took it at 9 am, I checked my period tracker, realized we had sex ON THE DAY I WAS OVULATING. I was panicked as my period is regular, I always get my period on the predicted day, the ovulation predictor is spot on. Next I'm on the internet finding sites that say Plan B doesn't work when you are already ovulating. I decided to trust the pill and wait. I experienced EXTREME fatigue, breast tenderness, dizziness, bloating, food cravings, minor cramping, more stressing, etc. Fast forward to December 15th, lo and behold, Aunt Flo showed up a day early! Trust the process, even a woman who has a very regular cycle was saved by Plan B during ovulation. Good luck!"

10 / 10
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  • Ann...
  • July 8, 2021

For Emergency Contraception "Let me just tell y'all that these past two months have been a roller coaster of a ride for me. So babe and I did the deed on May 22nd, the day after my period. Honestly, I don't know if he came in me or not, but to give me peace of mind, I went and bought Plan B on May 23rd, approximately 26-28 hours after the deed was done. I was beating myself up because I didn't use any contraceptive and I felt really silly. The day after I took the pill, I had a slight headache. Four days later, I began to have spotting. I spotted starting on May 28th and ended on June 3rd. My due date for my cycle was on June 14th. I have been bloated, nauseous, constipated, had headaches, felt fatigued, and been very moody. I began to stress and panic. My anxiety got the best of me and I went into depression. Honestly, if I had never found this website, I would be more of a mess than I am now. PLEASE. DON'T. GOOGLE. ANYTHING. Trust the pill. After 23 days, I finally got my period today on July 7th."

10 / 10
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More FAQ

  • Anonymous
  • July 21, 2021

For Emergency Contraception "Okay girls, I promised myself that if this pill worked for me, I would come back and comment on this and share my story. So I’m 20 years old and am already a mom of two. I met up with some old friends this summer and stupidly had unprotected sex with a guy I used to date years ago. He pulled out and didn’t finish in me, but I’m the paranoid type, so I went and bought a Plan B two days later. I was also in my fertile window according to my app. I was SO bloated for weeks and anxiously awaited my period, but it didn’t come on the expected day, so then I really freaked out. My period ended up being two weeks late! The worst two weeks of anxiety I’ve ever had. I’ve only used the pill about maybe 4 or 5 times in my life, and it’s worked every time. Girlies, try to relax. I’ve been in your shoes before, I promise. I’m never putting myself through that again, but I am so thankful the pill came through. The best of luck to everyone reading through these comments. Xoxo"

9 / 10
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  • Big...
  • February 14, 2020

For Emergency Contraception "My boyfriend and I had unprotected sex and he finished fully inside me - no pullout or anything. I’m also not on birth control. AND it was THE ovulation day. My period tracking app said it was the most fertile day of my cycle. I took it within 30 mins of him doing that, and I just started my period 5 days before it was scheduled to arrive. I spent so much money on pregnancy tests while checking this past week and a half. I had all of the symptoms: nausea, vomiting, bloating, mood swings, sore breasts, extreme fatigue. This pill can cause those things. The odds really are in your favor and don’t let any other apps or pills say that this one doesn’t work while ovulating. Tons of girls take it on their ovulation and they’re fine. Just take this pill immediately (within an hour) and try to relax! Keep living life — don’t let stress take over ❤️"

10 / 10
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  • Ano...
  • September 5, 2020

For Emergency Contraception "I promised myself I would share my experience! And guess what, it did work for me and I was close to ovulation! My period was supposed to be here by August 21, and it didn’t. I panicked a lot, like a lot! My period came after 14 days late, it started on Sept. 3rd! The side effects to me were terrible! I had anxiety attacks, I was always nervous, nausea, bloated. But it worked! I never plan on using it again though! Take a deep breath, you will be fine! Just don’t stress so much like I did. I know it’s impossible, but just try❤️"

10 / 10
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  • Que...
  • Taken for less than 1 month
  • June 7, 2020

For Emergency Contraception "I had unprotected sex last month on the 26th at 12 AM and according to my period app I was ovulating. I should’ve told him I wasn’t on birth control. The same day he brought me Plan B, and I took it right away. I was really anxious. I had a few symptoms. The first day it made me really sleepy. A week after I took it, the symptoms continued. I had mild cramps, felt bloated, and had mood swings. The waiting game was hard, seeing if my period was going to show up on time. Now today, my period started a day early, I was supposed to get my period on June 8th. I've never been so happy to see blood! I’ve seen a lot of people say the pill won’t work if you’re ovulating but that’s not true, so don't stress yourself out, the pill will work."

10 / 10
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  • Ano...
  • Taken for less than 1 month
  • November 26, 2019

For Emergency Contraception "I told myself I would share my experience if it worked because these reviews were the only thing keeping me sane. I had unprotected sex with my boyfriend on the 14th, which was when I was ovulating. Keep in mind I’m not on any birth control, nor did we use a condom. I know, dumb. We bought a Plan B, and I took it an hour after we finished. For two weeks, I was a mess. Especially when I found out it doesn't work during ovulation. I had extreme nausea, my boobs hurt, I had chills, lower back pain, bloating. I was convinced I was pregnant. But I got my period today, a day late. It’s heavier than usual, and the cramps are unbearable, but now I can relax. So please, for the girl reading this, take a deep breath. This pill really works."

10 / 10
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  • kay...
  • January 16, 2021

For Emergency Contraception "To the girl who is reading this, calm down and know that everything will be okay! I promised myself that if it worked for me, I would leave a review. I had unprotected sex on Dec 7 and bought the pill 30 minutes later. My last period was Nov 7. Fast forward to the end of December, and my period was nowhere in sight. I ignored my stress until I got VERY worried when my period was almost 3 weeks late. My nipples were more sensitive, my boobs were sore, I was moody, and I was bloated but still no period. I had been scrolling through pages and pages of reviews trying to bring myself comfort, and I kept seeing women saying it didn’t work and they were pregnant. I was starting to panic, so I decided to take a pregnancy test. I took two tests, and they were both negative. The day after I took the tests, my period came! (20 days late) Remember that the pill can mimic pregnancy symptoms, and everyone’s body is different. Not everyone’s body will react the same. You will be okay!"

10 / 10
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  • jbu...
  • July 28, 2014

For Emergency Contraception "I took this approximately 48 hours after unprotected sex while I was ovulating. I felt fine after taking the pill. A few days before my period was due, I experienced major mood swings, bloating, cramps, and sore breasts. These symptoms lasted for the few days before I was due, and then the symptoms stopped on the actual day I was due. But no period. Needless to say, I was freaking out! (This is why I am writing this to help others from freaking) -- I was supposed to start on a Friday. Then Saturday rolls around, then Sunday and no period... Just really, really sore breasts on Sunday. That Monday evening, I finally started and had breast tenderness, cramps, headache, tiredness... But at least I started - 3 (longest days of my life) days late."

10 / 10
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  • YYH...
  • December 20, 2020

For Emergency Contraception "I had sex on November 23, it wasn't until after we realized the condom had broken. I went to the pharmacy and managed to take Plan B about an hour and a half after sex. I realized after that I was about 3 days before ovulating, so I was at a high chance of getting pregnant. And of course, I had read that Plan B doesn't work if you have already ovulated. On November 30, I started bleeding, this went on for 5 days. I thought it was implantation bleeding because my nipples were also sore and sensitive. But it was a very light flow compared to my regular period, with few blood clots. My period was not due for another 2 weeks as well. A week after this, I had a thick, white, creamy discharge. I had to wear a pad for this. This went on for a week. My period was meant to be due on the 12th of December. I experienced breakouts, cravings, mood swings, extreme bloating, and mild cramps. I was convinced I was pregnant. I got my period today on December 20, eight days late, and I couldn't be happier."

10 / 10
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  • luv...
  • May 31, 2020

For Emergency Contraception "Okay, so like let me just start off by saying this: DON'T FREAK OUT, CALM DOWN, BREATHE!!! If you’re probably reading this because you think you’re pregnant and you just took Plan B. Anyways, I had unprotected sex, but he pulled out, but of course, being an overthinker, I bought Plan B and took it after 4 hours. I was getting bloated, and Google scared the life out of me. Anyways, it turns out I was on my fertile week, and I was supposed to ovulate in two days, and I read that it doesn’t work during your ovulation week. So of course, I started stressing, and let me tell you, that does NOT HELP YOU, OKAY. Also, my period wasn’t supposed to come until two more weeks, so I was even more stressed. But after reading a bunch of these reviews, I was fine, and honestly, try your best to NOT think about it, or else it’s gonna delay it even more. Anyways, so I took it on the 25th, and I got my period 5 days later."

10 / 10
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  • hug...
  • June 5, 2014

For Emergency Contraception "Alright ladies.. This pill is a lifesaver! Me and my boyfriend had an incident when the condom broke. At the time, I was ovulating and I took the Plan B pill within 24 hours. I didn't have any symptoms for about a week, and then I got ALL of them. Tender breasts, abdominal pain, bloating, very weird stomach noises, bad headaches, and very tired. My biggest symptom was being worried though! I am only 16, and I am now not pregnant. This pill works miracles! One relieved lady right here. Good luck to all of you!"

10 / 10
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  • Ary...
  • September 21, 2020

For Emergency Contraception "First of all, my period is irregular, it mostly comes on day 35 to 40. My last period was on August 1-August 7. I lost my virginity with a friend on August 10 (day 10 of my cycle), and my ovulation was due on August 23 (pretty far). The sex was unprotected, but the guy didn’t cum inside of me. I took Plan B about 4-5 hours after what happened. Two days later, I got a urinary infection, and I took antibiotics for 3 days (I read that it doesn’t affect how Plan B works). I started spotting/bleeding brown and red discharge on August 16-August 21. The bleeding covered a whole panty liner, so I used pads some days. My side effects: dizziness, nausea, cramps, and bloating. My period was expected to come on September 7, but I’m two weeks late. I have taken a lot of pregnancy tests, and all are negative. The dizziness, nausea, and cramps haven't gone away till this day. I had also a lot of white/watery discharge till this day. YOU GOT THIS GIRL!!!"

5 / 10
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  • -li...
  • December 17, 2020

For Emergency Contraception "Plan B works! I had sex while I was ovulating, and the condom broke. He pulled out, and he already came. The side effects were intense, I had cramps for three weeks until I got my period. My breasts hurt, I was bloated, I was gassy, and had sleepless nights. Every pregnancy symptom, so I stressed myself out! You will be okay, everybody’s body reacts differently. I was so glad to read the reviews on this page to help me feel less stressed. Now I am having the most painful period of my life!"

10 / 10
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  • Tha...
  • June 20, 2014

For Emergency Contraception "I took this pill about 20 hours after unprotected sex. I had absolutely no side effects for about a week, but then my breasts hurt and became enlarged. I was constantly bloated, constipated, and had horrible back pains and cramping. I was completely stressed out and scared I might be pregnant after freaking myself out reading about pregnancy signs. However, my period came today and I've never been so happy! The flow is normal but with more cramping than usual. Overall, I am very pleased with this product! It is way less expensive than a baby, and I am never having sex without protection again! But don't worry, ladies... It'll be ok!"

10 / 10
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  • not...
  • Taken for less than 1 month
  • August 4, 2014

For Emergency Contraception "This pill works! Trust it. I took it 34 hours after a condom slip. I experienced tiredness, bloating and minor abdominal discomfort, not so much as pain. I started spotting, then it completely stopped for two days, but nonetheless, my period came! Three days earlier than I expected and a lot heavier than normal, but it came! Trust this pill, it is a miracle worker. Take the pill within the 72-hour time frame, relax, and hope for the best! $55 is nothing compared to the cost of getting pregnant! Best of luck, ladies!"

10 / 10
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  • het...
  • November 11, 2013

For Emergency Contraception "I took it just to be sure almost 40 hours after the incident. I did not get pregnant. That said, this was the first time I used any type of oral contraceptive EVER. So I had horrible side effects. Probably not because of the medicine as such but may be because of the high dosage of it. A day after, I was completely exhausted and had spotting a week later. That week was terrible. I had gastric trouble, acidity, bloating, sort of menstrual cramps, pretty much all the symptoms of pregnancy. Turns out these were the side effects for the medication as my body was not used to sudden hormonal changes. So I sincerely suggest just using protection and being on a regular pill. Be cautious if you have never used any type of contraceptive."

3 / 10
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  • Jad...
  • June 20, 2021

For Emergency Contraception "Okay, I had unprotected sex on May 9, a day after my period. So I took Plan B since my boyfriend came in me. I was having spotting for a week. I was scared as anything, no lie. I was supposed to get my period on June 4, and it never came until today, June 19. I was 16 days late. Yo, I was cramping, bloated, craving foods, eating more, going to the bathroom more than usual, and sleeping so much. I was like, damn, I’m pregnant. But I took two tests last week, both were negative. Talked to my doctor, he said the Plan B can make your period late. You can miss a whole month. But if your period doesn’t come the next month, then you might be pregnant. I was freaking out for 2 weeks. I was crying and everything because I’m not ready to have a baby, neither is my boyfriend. I recommend just taking a test and talking to a doctor. The Plan B works, just give it time. Don’t freak out. Your period is coming, but next time get on some regular birth control, be sexual with someone with a strong pull-out, and use condoms."

10 / 10
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  • 243...
  • November 14, 2019

For Emergency Contraception "I took this around September 13. He pulled out, but we were still worried about precum, and I was sure I was also ovulating. I have irregular periods sometimes, but my next period was expected to be on Sept 28. I had withdrawal bleeding from Sept 16-20. I never got a period in October. My stomach was bloated, I was always emotional, I felt nauseous sometimes, and got tired very fast. It was basically every pregnancy symptom, and I freaked out. Finally, on the morning of Nov 13, I thought I would go take a pregnancy test, even though there was almost no chance. My period was 30 days late, and on my way to Target, I felt a really weird cramp, and I went to the restroom to check, and thankfully I had my period. Don’t read reviews and generalize, everyone has different bodies, always test to make sure :)"

7 / 10
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  • Mor...
  • November 16, 2019

For Emergency Contraception "Yes, it does work extremely well. I had sex with a condom on my day of ovulation, but we didn’t know until after that the whole condom split and he came fully into me! So I was freaking out and I raced out and got the off-brand Plan B. They all work the same, it’s the same medication and dosage! Afterwards, I spotted brown blood and felt bloated for about a week. I was also moody and got the feeling that I had to throw up. But don’t worry, this is a completely normal side effect. Symptoms of Plan B and pregnancy are the exact same since the hormone used in Plan B is the one that is produced when a woman is pregnant. Today, I got my period after about a week and a half of nail biting. I was worried since I read that it doesn’t work during ovulation, but it’s almost impossible to know if you are ovulating since there is no way of knowing. I can consider myself extremely lucky and learned my lesson! Good luck and trust the medication, it wouldn’t be on the market if it didn’t work!"

10 / 10
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