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According to Hospice, ibuprofen begins to relieve pain one to two hours after it is taken. Its effects usually last for five to 10 hours. Ibuprofen provides the highest level of pain relief if it is taken regularly for two to three days.


The effects of ibuprofen last between five and 10 hours, according to Hospicenet.org. Ibuprofen typically begins working within one to two hours of ingestion. The recommended dosage for ibuprofen is one 200 milligram tablet every four to six hours. Adults should not tak...


To use ibuprofen safely, it is recommended you not increase the dosage set forth by your doctor, according to Mayo Clinic. It is further advised that the drug not be taken any more often or for any longer than what is prescribed by the doctor.


Ibuprofen is not typically prescribed to dogs and can actually be poisonous to them, according to the Pet Poison Helpline. Common signs that a dog has consumed ibuprofen include behavior changes, reduced dietary intake, redness of skin and tarry stool.


Ibuprofen is completely eliminated from the body in 24 hours after taking the final dose. Peak concentrations of the medication affect the body within 1 to 2 hours, according to National Center for Biotechnology Information.


A person can safely take ibuprofen while drinking alcohol, according to Everyday Health; however, taking too much of both can cause stomach irritation and related problems. Alcohol irritates a person's stomach and intestinal tract, and extended use of ibuprofen can irri...


The long-term effects of ibuprofen include an increased risk of heart attack and stroke, particularly if dosage is high. Women can experience a loss or reduction in fertility with long-term use, although it is possible to reverse that by stopping the medicine, according...