Ibuprofen Dosing and Administration. Ibuprofen is not used during pregnancy. But out of pregnancy - you are welcome. Two to four pills in a single dose of the day are prescribed during which it is advised to take three times a day, up to 4 times. Ibuprofen, commonly known by the brand names Motrin and Advil, is a great pain reliever and fever reducer. But it’s best to stay away from it right now. Here’s why: While ibuprofen is actually pretty safe in the early parts of pregnancy, it can cause some serious problems for baby if you take it It's unlikely that one dose will harm your baby, but taking ibuprofen (Advil and Motrin) is generally not recommended when you're pregnant, especially during the third trimester. Ibuprofen and pregnancy Ideally, pregnant women shouldn't take ibuprofen unless a doctor recommends and prescribes it. It's best to tell your GP, pharmacist or health visitor about any medicines you're taking. Ibuprofen is commonly available in the United States up to the FDA's 1984 dose limit OTC, rarely used higher by prescription. In 2009, the first injectable formulation of ibuprofen was approved in the United States, under the trade name Caldolor. I too get bad migraines/headaches during pregnancy. I drink a cup of coffee a day and tylenol as needed. All at the advice of my doc. I was/am a big coffee drinker so its detrimental for me to cut it out entirely. Ibuprofen Pregnancy Warnings Not recommended during last trimester of pregnancy. Prior to 30 weeks gestation: Use only if potential benefit justifies the potential risk to the fetus. Detailed Ibuprofen dosage information for adults and children. Includes dosages for Pain, Osteoarthritis, Rheumatoid Arthritis and more; plus renal, liver and dialysis adjustments. Ibuprofen shouldn't be used when you're 30 or more weeks pregnant, unless it's on the advice of a doctor. This is because taking ibuprofen at this stage of pregnancy is associated with an increased risk of complications, including a heart problem in your baby and a reduced amount of amniotic Ibuprofen prematurely closes the heart’s ductus arteriosus, increases reactive oxygen species, and inhibits placenta vascularization. Ibuprofen use late in pregnancy can reduce the production of the prostaglandins responsible for maintaining a patent ductus arteriosus.