you probably cant do anything about it if you are on your period now , but i would suggest taking a different birth control if you dont want to have children in the near future, i was the same as you and had very heavy periods and very painfull too, i started to take the depo injection as a form of contraceptive and after my first. Do aspirin and acetaminophen affect total menstrual loss? Pendergrass PB, Ream LJ, Scott JN, Agna MA. Two commonly taken over-the-counter analgesics, aspirin and acetaminophen, were compared for: effect on total menstrual loss, effect on total days of menstruation, and effect in reduction of pain due to headaches and/or menstrual cramps. Success rates: More than 80% of women will have a significant reduction in bleeding—in fact, the average length of a period dropped from 8 to 5 days with a lighter flow during that time. From stress to diet to your contraception, there are so many factors that can affect your flow - but lots of us don’t realise that the medication we take could actually be one of them. Hormones in your cycle cause your uterus to contract, and when it contracts too strongly, blood and oxygen flow decrease which cause that all-too-familiar pain. Just know that this is normal: your muscles help your body squeeze out the uterine lining (or blood) every month when you get your period. Officially, flow of more than 80 ml (or 16 soaked sanitary products) per menstrual period is considered menorrhagia. Most women bleeding this heavily will have a low blood count ( anemia ) or evidence of iron deficiency ( 1 ). Using an NSAID at the time of a period can decrease the amount of bleeding by 20-40%, and sometimes by even more if a woman normally has very heavy periods. NSAIDs also work great for relieving menstrual cramps. Best Answer: I always take Tylenol when I get my period and I don't think it makes your period go slower. It helps get rid of the pain but not the bloating. Most periods are heavier the first 2 days and then the blood flow tends to slow down after that, regardless of whether you take tylenol or not. If you. Ibuprofen can inhibit prostaglandin from doing its job, and the result will sometimes mean that if you take ibuprofen while on your period, the flow may be stopped completely. This can sometimes be true of tylenol as well. I took Tylenol twice yesterday (Second day of period). I took two 500MG extra strength in the morning and in the afternoon. This morning when I woke up, I had never experienced a period this heavy.