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
Hey I took antibiotics only 3 times in November my last period was Oct 25 never came on in November my period was due the 22 But I took a pregnancy test the yesterday the 4 of December it was neg. could it be the antibiotics
Hi there Ke, yes the antibiotics could be the cause for your delayed period.
Hi, I took cipro and metro pills hoping they will cure my vaginal yeast infection and I started taking them from 10 Nov to 18 Nov and I had protected sex on 10 Nov. Since then I haven’t been on my periods of which I was supposed to go around 24 Nov. I’m getting worried now, can you tell me what’s wrong?
Hello Claire, you took antibiotics which might be responsible for your currently delayed period.
Hello Alison! I started taking antibiotics for skin infection on Nov 9 and I had anal sex on nov 11, I had a pad and I think it leaked but I don’t know if the pad protected it. 3 weeks now My period is 2 days late and I have breast cyst, headache and super bloated stomach and gut problems as well as intense nausea all day. I have extreme anxiety and stress and I’m always shaking and worrying. I don’t know if my late period and symptoms are because of antibiotics, pms or pregnancy. Please help, thank you
Hello Ana, the delay in your period could be as a result of you taking the antibiotics.
I last had my period OCT 12th and I took antibiotics twice on to separate days two weeks after. I did have unprotected sex on NOV 13th and again on NOV 28th. I then experienced a light flow off and on starting on NOV 30th and lasting until Dec. 2nd. Is this just result of the antibiotics?
Hello Lex, this might not be solely because of you taking antibiotics, you mentioned that you had unprotected sex. It could be as a result of this. Please take a pregnancy test 7 days after a missed period.
Hello Alison, I had my period 31st of October then had sex unprotected sex twice while ovulating and once after…but I took antibiotics in all 3 of them…but I was supposed to.get my period on the 1st of December but it’s 2nd now and I still haven’t gotten it though I have signs of my period like my breasts hurt.
Hello Tessy, please take a pregnancy test 7 days after a missed period.
Started amoxicillin 875mg Tuesday my period is 6 days early and I always track my periods and they are always the same. Is it the antibiotic?
Hello Anonymous, yes this could be as a result of the antibiotics.
I took antibiotics for 10 days for strep and 3 days after my last dose my period started which was slightly early. It has been over a week and it still isn’t stopping, what is going on??
Hello Ericka, the antibiotics is more than likely the reason for this.
I had my period on 26th Oct and I have regular cycle now it’s 28th of November and am still not Getting my period. I had lots of injection and antibiotics and lots of antacid due to my gastric problem..during my period days in the previous month and was even on a antibiotic coarse for a week. Is this the reason that is delaying my period? I even had protected sex fr a couple of days. I am very tensed whether some semen got leaked THROUGH the shaft and can make me pregnant or not!( though it is highly unlikely to happen still I am panicked like hell).
Hello Riya, the antibiotics is more than likely the cause for your delayed period.
I had my menses on the 7 October n had unprotected sex on the 11 to 16 October from there had sex again on 19 but I took contraceptive and now I’m pregnant. Please how come?
Hello Chris, you are pregnant because you had unprotected sex during the 11th to the 16th of October. All the best.
Hey alison;
Thanks for the reply. But I had my antibiotics in the first two weeks of my last period and it’s been 5days I am even having a milky nipple discharge surprisingly. Is this anyway affecting my period? Coz m still not having it!
Will be eagerly waiting for your reply.
Thank you!
Hello Riya, please take a pregnancy test 7 days after a missed period.
Hi misty my last period is Oct. 19 we had sex in Nov. 1 and ive been sick on Nov 13to 15 due to difficulty of breathing they gave me antibiotics ceferoxime and salbutamol my next period is Nov 19 but im still not seen my period..
Hello Mary, the use of antibiotic might be the cause of your delayed period.
Hi Alison,
I was on a strong antibiotics the second and third week after my last period. I was supposed to be on my period this week, but it hasn’t come. I’m supposed to start a new BC package tomorrow. I’m wondering if I should just wait to start my BC because I haven’t had my period. Super stressed about it not coming right now.
Thanks!
Hello Annie, the antibiotics may be the reason for your delayed period.
After the delay of not seeing your period because of taking antibiotic ,,,what can someone do to bring it back please??about 5days now am having the symptom but yet to come
Hello Gracy,it will come naturally, just give it some time.
I had sex on the 7th of october and had my period on the 15th of october. Now 3 weeks ago I got chicken pox and I was on a bunch of antibiotics and now I am a week late..
Hello Micah, the anitbiotics might be the cause of this.
I track my ovulation with a well known method, and I recently ended a week long course of amoxicillin. I had unprotected sex a week after I was supposed to be ovulating, and on Sunday (when I was supposed to start my period) it was very light. It’s now Tuesday, and the bleeding is still light, and it’s not like my regular flow at all. I took a pregnancy test today, and it was negative. Could the light period be from the antibiotics? When should I retest for possible pregnancy?
Hello MO, yes the light flow is likely happening because of the anti-biotics.
Hi I last had sex sept 30 but I’m taking the lady pill, I got my period oct.9 then I took antibiotic in 7 days.. now my menstruation has not yet come. It is 3 days delayed.
Hello there Lyn, the antibiotic might be the cause for this.
Hi Alison, I had my period on the 6th last month(October) due to taking the morning after pill…it usually comes on the 17th though.. now November 6 I had sex with withdrawal method but still took the morning after pill for safety reasons and due to a uti I had to start antibiotics (ciprofloxacin) today(11 November) …I’ve still not seen my period… I’m scared to bits…
Hello Mariam, the antibiotics might be the reason for your delay.