Ibuprofen is effective for mild to moderate pain and is often recommended for short-term use. Intravenous ibuprofen has also shown benefits for severe pain, such as after surgery, with studies indicating lower pain scores compared to other NSAIDs like acetaminophen.[1]
How Does Ibuprofen Work?
Ibuprofen works by reducing hormones that cause pain and inflammation. It inhibits the cyclooxygenase (COX-1 and COX-2) enzymes, which are involved in the production of prostaglandins—chemicals that promote inflammation, pain, and fever.[2] [3] [4]
By blocking these pathways, ibuprofen reduces swelling, pain, and fever, providing its analgesic, anti-inflammatory, and antipyretic effects. Ibuprofen has a greater affinity for COX-1 than COX-2, which influences its side effect profile.
How Can Ibuprofen Be Administered?
Ibuprofen is available as oral tablets, liquids, chewable tablets, topical gels, sprays, and intravenous solutions. Oral tablets should be taken with food to reduce stomach upset. IV ibuprofen is reserved for hospital use.[5]
Ibuprofen can be given to children aged 3 months or older (and at least 5kg) for pain and fever, but always follow dosing instructions and consult a healthcare professional for children.
How Long Does Ibuprofen Take to Work?
According to the NHS, over-the-counter ibuprofen starts to work within 20 to 30 minutes. Maximum blood concentration is reached in 1–2 hours, when pain relief is usually at its peak.[6]
The speed of onset can vary depending on the formulation, dosage, individual metabolism, and whether it is taken with food. Anti-inflammatory effects may take a few days to a few weeks to become fully apparent. The plasma half-life is 1–3 hours, so repeated doses may be needed for ongoing pain.[7]
For chronic pain, ibuprofen may be combined with other medications (such as amitriptyline) for enhanced relief. Always consult your healthcare provider for personalized pain management.
Common Side Effects of Ibuprofen
Ibuprofen is generally safe when used as directed, but side effects can occur, especially at higher doses or with long-term use. People with heart, kidney, or liver problems, high blood pressure, or those who are pregnant or breastfeeding should use ibuprofen with caution.
- Stomach pain, heartburn, indigestion, nausea
- Stomach ulcers or bleeding (especially with long-term use)
- Edema (fluid retention), increased blood pressure
- Allergic reactions (rash, shortness of breath)
- Kidney or liver injury (rare but serious, especially in children)
- Constipation, bloating
Elderly individuals and those on other medications (e.g., diuretics, warfarin, phenytoin) are at higher risk for complications. Always use the lowest effective dose for the shortest possible time.[8] [9]
How Long Do The Effects of Ibuprofen Last?
The effects of ibuprofen typically last 4–6 hours. The half-life of ibuprofen is about 2 hours, meaning its concentration in the body decreases by half every two hours. It may take up to 24 hours for ibuprofen to be fully eliminated from your system.[10]
For ongoing pain, you may need to take ibuprofen every 4–6 hours, but always follow your doctor’s or pharmacist’s instructions and never exceed the recommended daily dose.
Prolotherapy: An Alternative Way to Treat Pain and Swelling
In recent years, Prolotherapy has built its reputation within the medical community for its clinically proven ability to treat pain.
Published research has proven its pain-relieving, anti-inflammatory, and regenerative benefits.[11]
Prolotherapy involves injecting a natural regenerative solution with tiny needles. This stimulates the production of collagen cells, which are needed to help with pain and tissue repair.
As prolotherapy helps to treat the root cause of pain, it is considered a permanent fix, preventing symptoms from returning.
Storage and Disposal
Keep ibuprofen in its original container, tightly closed, and out of reach of children. Store at room temperature, away from excess heat and moisture (not in the bathroom).
Dispose of unused or expired ibuprofen safely. Do not flush it down the toilet. Use a take-back program or consult your pharmacist or local waste disposal authority for guidance. For more information, visit the Safe Disposal of Medicines program.
Other Important Information
Do not share your ibuprofen with others. Keep a list of all prescription and nonprescription medicines, vitamins, and supplements you take, and bring it to all medical appointments. This helps prevent harmful drug interactions and ensures safe care in emergencies.
Frequently Asked Questions
How quickly does ibuprofen work for pain?
Ibuprofen usually starts to relieve pain within 20–30 minutes after oral administration, with peak effects at 1–2 hours.
How long do the effects of ibuprofen last?
The effects typically last 4–6 hours. For ongoing pain, doses may be repeated as directed by your healthcare provider.
Can I take ibuprofen on an empty stomach?
It is best to take ibuprofen with food or milk to reduce the risk of stomach upset or irritation.
What are the risks of long-term ibuprofen use?
Long-term use increases the risk of stomach ulcers, bleeding, kidney or liver problems, and cardiovascular issues. Always use the lowest effective dose for the shortest time.
Is ibuprofen safe for children?
Ibuprofen can be given to children over 3 months old and weighing at least 5kg, but always use the correct dose and consult a healthcare professional.
Contact ProHealth Clinic Today for Your FREE 15-Minute Discovery Call
Don’t let pain control your life any longer. Join the thousands of patients who have found lasting relief through prolotherapy at ProHealth Clinic.
Get in Touch
- Phone: +441234380345
- Email: info@prohealthclinic.co.uk
Our Clinic Locations
- London: 104 Harley Street, Marylebone, W1G 7JD
- Manchester: The Hadley Clinic, 64 Bridge Street, M3 3BN
- Bedford: The Village Medical Centre, Kingswood Way, MK40 4GH
All clinics offer the same award-winning prolotherapy treatment with convenient appointment times, including evenings and weekends.
Author Bio
Having performed over 10,000 procedures, Mr Eaton is one of the UK’s leading practitioners in the field of treating pain, with patients travelling to see him from across the UK, Europe, and the Middle East.
With over 12 years of clinical experience, Oliver is dedicated to helping patients understand their symptoms associated with pain and providing effective treatment options to alleviate them.
He qualified in Prolozone Therapy and Prolotherapy in America with the American Academy of Ozonotherapy. He continued on to complete further qualifications at the Royal Society of Medicine, Charing Cross Hospital in London, Keele University’s Anatomy & Surgical Training Centre, and the medical department of Heidelberg University in Germany.
Over the years he has had the privilege of treating many elite-level athletes, including both Olympic and Commonwealth medallists.
LinkedIn profile
References
- Ekinci, M., et al. (2020). “A Randomized, Placebo-Controlled, Double-Blind Study that Evaluates Efficacy of Intravenous Ibuprofen and Acetaminophen for Postoperative Pain Treatment.” Journal of Gastrointestinal Surgery, 24(4), 780–785. Read study
- Hiľovská, L., et al. (2015). “The potency of the nonsteroidal anti-inflammatory drug in chemotherapy.” Molecular and Clinical Oncology, 3(1), 3–12. Read study
- Harizi, H., et al. (2008). “Arachidonic-acid-derived eicosanoids: roles in biology and immunopathology.” Trends in Molecular Medicine, 14(10), 461–469. Read study
- Schwier, N., & Tran, N. (2016). “Nonsteroidal Anti-Inflammatory Drugs and Aspirin Therapy for the Treatment of Acute and Recurrent Idiopathic Pericarditis.” Pharmaceuticals (Basel), 9(2), 17. Read study
- Ferguson, J. M. (2019). “Pharmacotherapy for patent ductus arteriosus closure.” Congenital Heart Disease, 14(1), 52–56. Read study
- Evans, A. M., et al. (1990). “The relationship between the pharmacokinetics of ibuprofen enantiomers and the dose of racemic Ibuprofen in humans.” Biopharmaceutics & Drug Disposition, 11(6), 507–518. Read study
- Davies, N. M. (1998). “Clinical pharmacokinetics of ibuprofen. The first 30 years.” Clinical Pharmacokinetics, 34(2), 101–154. Read study
- Norman, H., et al. (2014). “Also ibuprofen, not just paracetamol, can cause serious liver damage in children.” Lakartidningen, 111(40), 1709–1711.
- Aljadhey, H., et al. (2012). “Comparative effects of non-steroidal anti-inflammatory drugs (NSAIDs) on blood pressure in patients having hypertension.” BMC Cardiovascular Disorders, 12, 93. Read study
- Mazaleuskaya, L. L., et al. (2015). “PharmGKB summary: ibuprofen pathways.” Pharmacogenetics and Genomics, 25(2), 96–106. Read study
- Hauser, R.A., et al. (2016). “A Systematic Review of Dextrose Prolotherapy for Chronic Musculoskeletal Pain.” Clinical Medicine Insights: Arthritis and Musculoskeletal Disorders, 9, 139–159. <a