Did you know that antibiotics could affect the menstrual cycle? Indeed, most of them can have an effect on menstrual periods, with some reporting delays. Find out more about the connections between antibiotics and the menstrual cycle below. Your Regular Cycle During the first 14 days of a 28-day menstrual cycle, your follicle will start to grow and kick-start the initial production of additional estrogen. It will start to make the endometrium lining thicker. When ovulation commences, the estrogen hormone will be joined by the progesterone hormone from the corpus luteum to make the endometrium mature and thicker. How Antibiotics
Antibiotics and menstrual cycle
Hi, I’m 5 days late on my period I took Postinor 2 after having sex with my bf earlier this month and then went for another birth control pills (antibiotics) during the middle of the month I bleed for five days and now I have not seen my period, I ran a home pregnancy test but negative. Is it possible that I’m pregnant?
Hi there Amarachi, the antibiotics might very likely be the reason why your period is delayed.
My period was supoosed to be on 20 of july but up to now i havent. Before that i took antibiotics like Doxcyline and other names of antibiotics i forgot now. And i also did do pregnacy test twice it was negative. Should still worry? Pls help.
Hello Sarah, the antibiotics might be the reason why your period is delayed.
Maureen
I took some antibiotics when I had my periods early this month..I had some slight bleeding and some effects that made me stop taking the antibiotics.I had unprotected sex where he pulled out.. According to my timer..i was supposed to have my periods yesterday but nothing…can the antibiotics cause the delay…
Hello Lilly, yes antibiotics can cause a delay in your period.
I was diagnosed with BV and currently taking metronidazole vaginal suppository for 4days now. This is my first time to exprience delay period. I had unprotected sex july 14 supposedly my fertility period. Is it because of the antibiotic that im taking or possible that i am pregnant?
Hello Maggie, the menstrual delay you are experiencing might be as a result of the antibiotics taken.
I wish I found this article sooner!! I was on a 10 day course of penicillin which delayed my period by 5 days. My period started about 20 hours after I finished the last antibiotic (today). Thanks for the article!
Hello every one my period flow started yesterday, I took ampiclox that evening, today I did not see any flow, what could be the cause?
Hi Sophie, antibiotics can delay a period. If you haven’t gotten it at this point I would recommend taking a test.
I missed my period and I hv run pregnant test and is positive but am on typhoid and malaria medications …what could be problem?
Hello Gift, congratulations, this means you are pregnant.
I would definitely go see your doctor immediately so they can switch you off of the antibiotics. They can be unsafe for pregnancy, unless they have you on a safe one, but if it’s doxycycline it is not safe to continue while pregnant.
I’m 9 days delay now…our last sex intercourse was on June 24, two days after we have sex I got sick and I drink antibiotic named klacid500 and have injected a serum for my throat because i had flu…11th of july is my period date is it possible that I’m pregnant???
Hello Thessa, the antibiotics might be the cause for the delay in your period.
I normally see my monthly fluid by the middle of the month, at the range of 15, 16, 17, and 18, and today is the 19th, though I have been taking ampiclox since the 16th. Is it the ampiclox that’s delaying my monthly fluid?
Hi Tee, yes, the antibiotic can be the cause of the delayed period.
hello, i took ampiclox antibiotic and when my period came,thick like chese heavy uncontrollable blood keep dropping like an abortion and concerned pls what could be the cause? i did not take any pregnancy test though?
Hi Eunice, could have been the effects from the antibiotics as that can affect your period. However I probably would have taken a pregnancy test and determined if it was a miscarriage also.
I had a really bad strep throat so I took penicillin for a month. My period is usually pretty on time but this time I’m already 5 days late. I have taken a birth control pill once for my acne but now I’m no longer taking it. I had a protected sex with my bf (used condom) 2 days before my ovulation date. I stopped taking penicillin 3 days ago since my strep got a bit better. I felt cramps left side on my stomach. Idk if it because I was on antibiotics too long or my period is coming but still no period. Should I worry about pregnancy?
Hi Keke, if you had protected sex, you shouldn’t have to worry about getting pregnant. However antibiotics can delay your period as well. Cramping could have been ovulation cramping too depending on when that fell in your cycle. I would take a pregnancy test if your period is late but again if you were using protection that’s not something that I would necessarily worry about unless that method (condoms) failed.
I stopped menstruating June 12th and I was sick like 10days after… Took drugs (antibiotics) and injection for malaria and typhoid… I dry humped with my boyfriend without clothes on and my period is 7 days late… Can I be pregnant
Hello Oyin, the antibiotics might be the cause for the delay with your period.
I’ve been on Doxycycline, Doxepine &Fluconanazole (generic brand for Diflucan )and my cycle started slow and now it’s gone over 7 days..I completely just stopped taking ALL medication, it’s for a skin bacteria ..this is why I hate taking medication..
Hi Dee, did they recommend you stopping the medications or did you just stop on your own? If so I would discuss with your doctor the ramifications of that. Otherwise, it could be normal for your body to be later than usual. Although I would also take a pregnancy test if there is any chance you could be pregnant.
PLS what can stop or help to control a prolong period????
Hi, it depends. If you naturally have heavier periods and are open to the option of hormonal birth control you can go that route.
I am now 17 days late for my period. I had sex between those days but he pulled out. I took a pt, but it says negative. I am so anxious about this. I was sick 3 weeks ago and took meds and antibitiotics. And now I am more than 2 weeks late for my period. Please help me. Oh yes, my previous period was 2 weeks early than the usual. I am thinkingvthat my became irregular. Is that normal?
HI Anne, the illness and antibiotics can cause a shift in your period. Our bodies are pretty sensitive honestly. If your pregnancy test is negative then you most likely are not pregnant. However if you are not trying to start a family, unless you are regular, the pull out method is one of the least reliable ones and I would recommend a regular form of protection.
My periods normally last 6-7 days. I got my period Sunday and it’s now tuesday night. I haven’t had my period since this afternoon. Can doxycycline shorten a period? Should I be concerned?
Hello Christy, the use of an antibiotic can delay or affect the regular flow of your cycle.