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StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2024 Jan-.

StatPearls [Internet].

Ibuprofen

Vincent Trung H. Ngo ; Tushar Bajaj .

Authors

Affiliations

Last Update: August 11, 2024 .

Continuing Education Activity

Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) used to manage various conditions, including inflammatory diseases, rheumatoid disorders, mild to moderate pain, fever, dysmenorrhea, and osteoarthritis. This drug is available over-the-counter and in prescription strength. This activity reviews ibuprofen's mechanism of action, adverse event profiles, dosing considerations, pharmacokinetics, contraindications, box warnings, and monitoring protocols, which are critical areas of focus.

Understanding ibuprofen's pharmacology enables healthcare professionals to optimize dosage regimens and minimize potential adverse effects. This educational activity also discusses the role of the interprofessional healthcare team in providing quality patient care using ibuprofen therapy, improving patient outcomes.

Implement effective collaboration and communication between interprofessional team members to improve care for patients who might benefit from ibuprofen therapy.

Indications

Ibuprofen is FDA-approved to treat inflammatory and rheumatoid disorders. Dr. Stewart Adams, OBE, discovered ibuprofen during his search for an alternative to corticosteroid therapy for patients with rheumatoid arthritis. Initially patented in 1961 by Dr. Adams and John Nicholson as 2-(4-isobutylphenyl) propionic acid, ibuprofen has become one of the most commonly used medications in the world.[1]

Most current research on ibuprofen as a pain treatment focuses on comparing its efficacy against other NSAIDs (particularly COX-2 inhibitors) or novel treatment methods. A study comparing COX-2 inhibitors with ibuprofen after third molar removal procedures showed no statistically significant differences in pain relief after 6, 8, and 12 hours. However, a substantial dose of rescue analgesia was required for the ibuprofen group at 24 hours. Researchers also noted more significant nausea and vomiting in the ibuprofen group.[2]

FDA-Approved Indications

Ibuprofen and other NSAIDs are FDA-approved to treat osteoarthritis, often in conjunction with non-pharmacological measures such as weight loss and strengthening exercises. Adjunct medication usage has been explored; one study showed improved outcomes for patients with chronic knee pain due to osteoarthritis who received combination acupuncture and topical ibuprofen therapy compared to patients receiving topical ibuprofen monotherapy.[4] A comparative study between celecoxib and ibuprofen revealed equal tolerance and efficacy for patients with knee osteoarthritis.[5]

Intravenous injection:

Intravenous ibuprofen lysine:

The FDA has approved intravenous ibuprofen lysine for closing PDA in premature infants, as it is as effective as indomethacin with reduced adverse effects.[6] The American Academy of Pediatrics (AAP) recommends IV ibuprofen for symptomatic infants with hemodynamically significant patent ductus arteriosus (hsPDA).

Clinically significant and refractory PDA in infants with a body weight of 500 to 1500 g and gestational age of no more than 32 weeks should be closed. No beneficial outcomes have been reported for patients who are administered ibuprofen lysine administration late (more than 6 to 14 days after birth), and it may potentially lead to adverse outcomes such as bronchopulmonary dysplasia (BPD) due to prolonged shunting.[7]

Over-the-counter:

Ibuprofen is available as an over-the-counter (OTC) medication and is FDA-approved to treat mild to moderate pain in patients with various conditions, including the following:[8]

Fever: The use of NSAIDs to treat fever is common in pediatric patients and current research is focused on increasing ibuprofen's efficacy for treating pediatric fever. A literature review in 2017 showed little evidence suggesting superior efficacy between ibuprofen and acetaminophen (paracetamol) for treating fever. Six studies evaluated during this review showed a marginal difference in favor of ibuprofen, but this was insufficient to conclude ibuprofen was the superior treatment.[9] In a related study, refractory fevers responded more favorably to alternating acetaminophen and ibuprofen doses compared to monotherapy. However, this was only observed in patients who responded positively to the first treatment cycle.[10]

Musculoskeletal pain: The American College of Physicians (ACP) and the American Academy of Family Physicians (AAFP) recommend oral NSAIDs like ibuprofen to alleviate pain and improve physical function in patients with acute pain from non-lower back musculoskeletal injuries.[11] Based on a network meta-analysis of randomized clinical trials, ibuprofen exhibits superior efficacy and safety compared to other analgesics for patients with episodic tension-type headaches.[12]

Primary dysmenorrhea: This condition typically involves pain during menstruation, which may vary in quality and timing. Dysmenorrhea may be primary, which is usually mediated by prostaglandin production during ovulation, or secondary to another condition, such as endometriosis or pelvic inflammatory disease.[13] NSAIDs are a common therapeutic choice and are FDA-approved to treat primary dysmenorrhea. A study exploring the use of cinnamon as an alternative treatment for primary dysmenorrhea study showed beneficial effects for pain reduction compared to placebo, but these were weaker than the effects mediated by ibuprofen.[14]

Transdermal drug delivery has been a research topic in the context of ibuprofen and primary dysmenorrhea; a study investigated essential oils as penetration enhancers for transdermal delivery of ibuprofen in patients with dysmenorrhea. This study was motivated by the known risk of GI bleeding and ulceration after oral NSAID usage and sought to investigate a potentially efficacious method of delivery that would decrease these risks. The study found that one of the essential oils positively affected permeation and pain alleviation when administered with ibuprofen hydrogel.[15]

Off-Label Uses

Ibuprofen may be administered for various non-FDA-approved conditions, including:

Active arthritis: According to the American College of Rheumatology, a trial of scheduled NSAIDs, including ibuprofen, is conditionally suggested as part of initial therapy for patients with active oligoarthritis and active temporomandibular joint arthritis.[16]

Acute gout: The efficacy of ibuprofen in treating gout attacks or flares has been studied extensively. Schweitz et al demonstrated rapid improvement and symptom resolution in 10 patients with acute gouty arthritis after administering 2400 mg of ibuprofen.[17] NSAIDs are commonly used as monotherapy for mild flares and in combination with colchicine for moderate or severe flares.[18]

Pericarditis: NSAIDs and colchicine are often used to treat pericarditis due to their anti-inflammatory and analgesic properties. Ibuprofen is a well-documented treatment for pericarditis, and researchers have demonstrated its effectiveness in treating and preventing multiple recurrences of idiopathic pericarditis compared to aspirin (CORP and CORP-2 trials) since 2011. The results of these studies showed no significant difference in treatment or prevention of idiopathic pericarditis between the 2 drugs.[19] During a 2014 review, colchicine was found to effectively reduce recurrent pericarditis when used as adjunctive therapy to NSAIDs such as ibuprofen, aspirin, or indomethacin. However, this review also noted limitations in the number of trials and statistical power.[20] The American College of Cardiology guidelines recommend ibuprofen as a treatment for acute pericarditis.[21]

Postoperative pain: In a randomized, double-blind study comparing intravenous ibuprofen and acetaminophen administration to treat postoperative pain in patients who underwent laparoscopic cholecystectomy, IV ibuprofen was associated with lower pain scores and reduced opioid use in the first 24 hours following procedure compared to acetaminophen.[22]

Colorectal cancer prevention: Since 2007, the USPSTF has recommended using aspirin and NSAIDs to prevent colorectal cancer in specific patient populations. In 2016, they updated this and their 2009 statement regarding aspirin and NSAIDs for preventing cardiovascular disease.[23] Although the newer recommendations are not for ibuprofen specifically, they still suggest a strong foundation of research that supports a potentially greater role of NSAIDs in cancer prevention and treatment. Recent studies on the efficacy of NSAIDs as part of cancer therapy have shown promise. A review by Hil'ovska et al outlined the potential of NSAIDs for reducing cancer cell growth, movement, and invasion, for the induction of cancer cell death, and for allowing lower doses of cytotoxic drugs.[24] The studies reviewed primarily focused on COX-2 inhibitors. For ibuprofen specifically, some studies have suggested it has a stronger effect against breast and lung cancer compared to aspirin, in addition to a reduction in breast cancer risk associated with ibuprofen or aspirin administration.[25][26]

Wawro et al found a potential indication for NSAID use (particularly aspirin and ibuprofen) in patients with colorectal cancer undergoing vincristine monotherapy. The purported role involves preventing chemoresistance by inhibiting the proliferation of cancer-associated fibroblast formation. Vincristine stimulates the growth of cancer-associated fibroblasts via the secretion of tumor growth factors β and interleukin-6; the researchers observed inhibition of this process after aspirin and ibuprofen administration. Their research suggests that the likely mechanism behind this involves NSAIDs affecting the microtubule polymerization rate.[27] Current research is directed toward developing an innovative drug therapy for rheumatoid arthritis involving the combination of NSAIDs and carbonic anhydrase inhibitors.[28]

Mechanism of Action

The primary mechanism of ibuprofen involves inhibiting prostaglandin precursors. After a physiological or pathological stimulus, membrane phospholipids release arachidonic acid through the actions of the enzyme phospholipase A2. Arachidonic acid is fed into 1 of 3 enzymatic pathways: cyclooxygenase (COX), lipoxygenase (LOX), and cytochrome P450 (CYP450). The cyclooxygenase pathway converts arachidonic acid to prostaglandins, prostacyclins, and thromboxanes. The lipoxygenase pathway yields hydroxy-eicosatetraenoic acids (HETEs), leukotrienes, and lipoxins. Lastly, the cytochrome P450 pathway converts arachidonic acid to HETEs and epoxyeicosatrienoic acids (EET).[24]

These pathways all create products called eicosanoids. These molecules are involved in the intercellular and intracellular signaling processes of various physiological processes, including smooth muscle tone regulation, vascular permeability, transporter proteins, platelet aggregation, and cell proliferation. Like cyclooxygenase pathway products, eicosanoids also involve autoimmunity, angiogenesis, atopy, inflammation, and cancer.[29]

The cyclooxygenase pathway is significantly involved in the indicated uses of ibuprofen. The COX pathway yields 3 distinct isoforms: COX-1 (PGH synthase), COX-2, and COX-3. COX-1 is a constitutionally expressed isoform, with levels relatively stable in response to most physiologic or pathologic stimuli. In contrast, COX-2 expression is highly inducible by mitogenic and inflammatory stimuli. The more well-known stimuli include transforming growth factors, fibroblast growth factors, vascular endothelial growth factors, and tumor necrosis factors. The function of the COX-3 isoform remains unknown and is currently under study.[24][30] Acetaminophen is known to inhibit the activity of COX-3.[31][24]

Inhibition of the COX-1 and COX-2 pathways reduces the expression of prostaglandin precursors; this, in turn, lessens the degree of cellular response to pathologic or physiologic stimuli. Through this mechanism, non-selective NSAIDs such as ibuprofen derive their analgesic, antipyretic, and anti-inflammatory properties.[24] For ibuprofen specifically, COX-1 is inhibited approximately 2.5 times more strongly than COX-2, suggesting the need for research on the efficacy of COX-2 selective inhibitors in treating conditions usually treated with ibuprofen.[19]

Aside from its well-known roles in inflammation, COX-2 is also constitutively expressed during early carcinogenesis.[14] Elevated levels of COX-2 are associated with various human cancers, including breast, colorectal, esophageal, lung, and pancreatic.[24] The current findings on COX-2 and its various effects suggest that the anticancer effects of NSAIDs occur due to COX-2 inhibition. The precise mechanism underlying this phenomenon remains a topic of ongoing research. Other pathways may be involved in NSAIDs' anticancer and antitumor effects, as NSAIDs reduce cell survival in overexpressed and deficient COX-2 malignant cells.[32]

The potential involvement of NSAIDs in carcinogenesis has been studied for the other 2 enzymatic pathways, but the information is still limited. LOX isoforms, particularly 5-LOX, 12-LOX, and 15-LOX, have been discussed as potential contributors to tumor development and growth. 5-LOX is normally expressed only in immune cells and has been implicated in the early stages of colon cancer, carcinogenesis in oral cavity tissue, and the expression of chronic myeloid leukemia.[33][34][35] 12-LOX has proangiogenic functions, as it controls G1/S-phase arrest via regulation of Nf-kB and inhibition of Akt and mitogen-activated protein kinases.[4] 15-LOX isoforms promote cell senescence and suppress cell cycle progression.[36]

Pharmacokinetics

Absorption: Ibuprofen is absorbed rapidly and completely after oral administration. However, food intake can affect absorption due to changes in gastric pH, emptying, and motility. When taken with food, ibuprofen's maximum plasma concentration (Cmax) is reduced by 30%–50%, and the time to reach maximum concentration (Tmax) is delayed by 30–60 minutes.

Distribution: Ibuprofen is highly bound to plasma proteins, with approximately 99% bound once absorbed.

Metabolism: Ibuprofen is primarily metabolized into hydroxylated and carboxylated compounds, which are the major forms of its metabolites. CYP2C9 and CYP2C8 are the primary CYP enzymes responsible for ibuprofen clearance.[37][38]

Elimination: Ibuprofen is primarily excreted through urine as metabolites and conjugates. Approximately 1% of the original drug is excreted unchanged.[39]

Administration

Available Dosage Forms and Strengths

Ibuprofen is available over-the-counter in most countries. Typical formulations include oral capsules, oral suspension, oral tablets, chewable tablets, intravenous solutions, topical gels, and combination kits. Ibuprofen with lysine is a commonly used intravenous formulation. Ibuprofen should not be administered simultaneously with total parenteral nutrition. However, it may be administered through the same IV line; total parenteral nutrition should be paused for 15 minutes before and resumed 15 minutes after ibuprofen dosing. Researchers are currently exploring the possibility of simultaneous delivery of ibuprofen with other IV medications or nutrition. A recent study exploring the chemical compatibility of continuous ibuprofen lysine infusion with total parenteral nutrition demonstrated the physical and chemical compatibility of ibuprofen infusion with 2 different total parenteral nutrition formulations in neonates with PDA.[40] Topical ibuprofen is also currently under study as a more efficient therapy for conditions treated with ibuprofen, such as osteoarthritis and dysmenorrhea.[15][41]

Adult Dosage

Oral ibuprofen should be consumed with food or milk. Intravenous administration is often preferred in inpatient settings or when oral delivery is unavailable. Infusion should occur over at least 30 minutes for adults and 10 minutes for pediatric patients.[6][22]

Pain relief: 200 to 400 mg orally every 4 to 6 hours, with a maximum daily limit of 1200 mg unless otherwise instructed by a physician. Physicians may prescribe higher doses of 400 to 800 mg orally every 6 hours, not to exceed 3200 mg daily.[42]

Joint inflammation: 1800 to 2400 mg daily for rheumatoid arthritis, osteoarthritis, and ankylosing spondylitis.[37]

Pericarditis: The American College of Cardiology guidelines recommend 600 to 800 mg of ibuprofen every 8 hours to treat acute pericarditis.[21]

Specific Patient Populations

Hepatic impairment: The product labeling does not include any information regarding dosage modifications. However, drug-induced liver injury (DILI), including steatohepatitis, is associated with NSAID administration. Ibuprofen should be used with caution for patients with preexisting liver disease.[43]

Renal impairment: Stable patients with stage 1 or 2 CKD without significant risk factors may be monitored per standard practice. For patients with stage 3 CKD and minimal risk factors, short-term NSAID use for pain management is acceptable for up to 5 days. Routine laboratory testing and follow-up within 2 to 3 weeks constitute appropriate monitoring. Long-term NSAID use in these patients poses higher risks due to prolonged exposure and the potential for increased toxicity. Therefore, prolonged therapy may be considered with patient education on avoiding high-risk conditions and close medical follow-up. Short-acting NSAIDs are preferred, and dosing intervals should be adjusted for CKD-related reduced drug elimination. NSAIDs should be avoided for patients with conditions dependent on prostaglandin-mediated renal blood flow, such as true extracellular volume depletion, cirrhosis, CHF, or nephrotic syndrome.[44]

Pregnancy considerations: In 2020, the FDA cautioned that using nonsteroidal anti-inflammatory drugs (NSAIDs) after 20 weeks of pregnancy could lead to fetal renal dysfunction, causing oligohydramnios and potentially neonatal renal impairment, limb contractures, and delayed lung development. These effects typically manifest days to weeks after starting NSAID treatment, with rare instances of oligohydramnios appearing within 48 hours. Discontinuing NSAIDs often reverses oligohydramnios. NSAID use from 20 to 30 weeks should be restricted to the lowest effective dose and shortest duration possible. NSAIDs are not recommended after 30 weeks due to the elevated risk of premature closure of the fetal ductus arteriosus. Ultrasound monitoring of amniotic fluid may be required if NSAID treatment exceeds 48 hours.[46]

Pediatric patients: The recommended dose of ibuprofen is 5-10 mg/kg orally every 6-8 hours, with a maximum of 400 mg per dose or 40 mg/kg daily.[49] Intravenous ibuprofen is an effective treatment for patients with patent ductus arteriosus (PDA).[50][51] Ibuprofen lysine is administered in 3 intravenous doses for treating PDA. An initial dose of 10 mg/kg is followed by 2 doses of 5 mg/kg given 24 and 48 hours later. Dosage is determined based on birth weight. If urinary output falls below 0.6 mL/kg/hr at the scheduled time for the second or third dose of ibuprofen, administration should be postponed until laboratory tests confirm normal renal function.

Older patients: According to the American Geriatrics Society (AGS) 2023 guidelines, NSAIDs like ibuprofen should be used long-term only when necessary and in combination with gastroprotective agents (proton pump inhibitor or misoprostol). Short-term use of ibuprofen with corticosteroids, anticoagulants, or antiplatelet agents should be avoided unless alternatives are ineffective and gastroprotection is feasible. High-risk patients, such as those older than 75 or using corticosteroids, anticoagulants, or antiplatelet agents, are more prone to gastrointestinal bleeding or ulcers as a result of NSAID therapy. Proton-pump inhibitors can reduce but not eliminate this risk.[52] In patients with an eGFR ≥90 mL/min/1.73 m², the standard dose of ibuprofen is 1600 mg. However, recommendations for dose adjustments based on renal function vary among eGFR equations. The recommended dose is also 1600 mg for patients with an eGFR ≥60 mL/min/1.73 m². For patients with an eGFR of 30–59 mL/min/1.73 m², the recommended dose falls to 1200 mg. Ibuprofen is contraindicated for patients with an eGFR ≤29 mL/min/1.73 m². The choice of eGFR equation significantly influences these recommendations; equations such as the Cockcroft-Gault (CG), Berlin Initiative Study (BIS), Full Age Spectrum (FAS), and Larsson-Male (LMR) generally recommend lower doses compared to the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation, which tends to estimate higher renal function. This variability highlights the importance of precise GFR estimation for appropriate ibuprofen dosing to ensure safety and efficacy, particularly in patients with hip fractures and varying degrees of renal impairment.[53]

Adverse Effects

Gastrointestinal bleeding is a well-known adverse effect of ibuprofen usage and can lead to gastritis, ulceration, hemorrhage, or perforation. Inhibition of COX isoform production reduces prostaglandin levels, which are involved in gastroprotective mucus secretion.[54] This effect is more pronounced with non-selective NSAIDs; selective COX-2 inhibitors are associated with a lower incidence of gastrointestinal complications, which is of particular concern in children. Ibuprofen is more commonly used than other NSAIDs due to its favorable safety profile. Using ibuprofen over-the-counter without medical consultation increases the risk of high dosage levels and short-term interval dosing that may precipitate gastrointestinal complications.[55]

Reduced renal function is also associated with ibuprofen administration. A recent surveillance study demonstrated the nephrotoxic properties of NSAIDs, including in patients with normal kidney function.[56]

Dehydration is a common risk factor for ibuprofen-induced renal injury. Various studies have explored the relationship between NSAIDs and kidney function in patients who are predisposed to dehydration, such as children with renal comorbidities or endurance athletes. A double-blind, placebo-controlled trial involving ultramarathon runners showed an increased rate of acute kidney injury in those who took ibuprofen, with a number needed to harm of 5.5.[57] Clinicians must consider a patient's renal function before administering ibuprofen or other NSAIDs.

Rashes are also known to occur in patients receiving ibuprofen therapy, usually due to drug hypersensitivity or skin irritation after topical administration. A rash may also be a component of severe reactions to ibuprofen, such as anaphylaxis or drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome. This condition can manifest as skin, liver, and hematologic abnormalities in patients who have recently taken ibuprofen. The etiology of DRESS syndrome is poorly understood; theories involving human herpesvirus-6 or hypersensitivity to toxic metabolites have been postulated.[58] DRESS syndrome typically occurs in patients taking anticonvulsants, sulfa derivatives, or antimicrobials. Information regarding ibuprofen-induced DRESS syndrome is limited; one case report documented the course of a pediatric patient who presented with DRESS syndrome in 2016. Another report from 2014 described a patient who developed a drug-induced liver injury with multiform exudative erythema after ingesting over-the-counter medication containing ibuprofen for 20 days.[59]

NSAID administration is also associated with hypertension. A 1993 cross-sectional study involving older adults revealed NSAID use to be an independent risk factor for developing hypertension in this age group.[60] Researchers have since begun investigating the effect of anti-inflammatory medications on hypertension development, including the comparative differences between NSAIDs. One retrospective cohort study in 2012 reported mild elevations in systolic blood pressure in patients who took ibuprofen and other NSAIDs compared to patients who received acetaminophen. However, this effect was negligible in patients already taking diuretics or multiple antihypertensives.[61]

Intravenous ibuprofen as a treatment for patent ductus arteriosus (PDA) causes hyperbilirubinemia and bilirubin displacement due to the high protein binding of the medication.[62]

Drug-Drug Interactions

ACE inhibitors: Ibuprofen may reduce the antihypertensive effects of ACE inhibitors. Monitoring is recommended for patients using these medications concurrently.

Aspirin: Ibuprofen can interfere with aspirin's antiplatelet effects, especially if these medications are taken together or if ibuprofen is taken before aspirin. To minimize this interaction, immediate-release low-dose aspirin should be taken at least 2 hours before ibuprofen. Concurrent use is generally not recommended due to increased cardiovascular risks.

Diuretics: Ibuprofen can diminish the natriuretic effect of diuretics such as furosemide and thiazides, potentially reducing their efficacy. Close monitoring is necessary for patients receiving these medications concurrently, as they are at an increased risk of AKI.[63]

Lithium: Ibuprofen can increase plasma lithium levels and reduce renal lithium clearance by inhibiting renal prostaglandin synthesis. When ibuprofen and lithium are administered together, patients should be monitored for signs of lithium toxicity.[64]

Anticoagulants: Ibuprofen increases the risk of gastrointestinal bleeding in patients receiving warfarin therapy.[65] Patients should be monitored closely for signs of bleeding when these medications are used together.

Contraindications

Ibuprofen is contraindicated for patients with a known history of hypersensitivity or allergic reactions to the drug itself, other NSAIDs, or aspirin. Numerous case studies have detailed ibuprofen as a disease precipitant.[58][59] NSAIDs are among the medications most frequently associated with hypersensitivity reactions in adult and pediatric patients. These patients are typically diagnosed with urticaria or angioedema caused by cross-intolerance to other drug classes, particularly quinolones and amoxicillin-clavulanic acid.[66]

NSAID-induced hypersensitivity reactions in pediatric patients exhibit a similar prevalence to adult reactions but differ in clinical phenotype. Oral provocation testing remains the gold standard for diagnosing NSAID hypersensitivity, and safe alternatives for cross-intolerant children and adolescents include tolmetin, etoricoxib, paracetamol, and nimesulide.[67]

Ibuprofen lysine IV formulation is contraindicated for preterm neonates with congenital heart disease requiring PDA patency, active bleeding, thrombocytopenia, renal impairment, coagulation defects, and documented or suspected necrotizing enterocolitis. Outside of these scenarios, ibuprofen is not associated with an increased risk of adverse reactions when administered to infants younger than 6 months and remains indicated for pediatric patients without these contraindications.[66]

In Canada, ibuprofen's drug labels list additional contraindications, including active GI or cerebrovascular bleeding, uncontrolled heart failure, lupus, renal impairment, and hepatic impairment or disease.

Box Warnings

Cardiovascular thrombotic events: Ibuprofen increases the risk of serious cardiovascular events such as myocardial infarction and stroke.

Coronary artery bypass: Ibuprofen administration is not advised during the perioperative period for patients undergoing coronary artery bypass graft (CABG) surgery.[68]

Gastrointestinal adverse events: NSAIDs such as ibuprofen increase the risk of gastrointestinal complications, including bleeding, perforation, and ulceration. This risk is further elevated in older patients and those with pre-existing gastrointestinal conditions; these patients already have suppressed levels of protective prostaglandins in the gastrointestinal tract.

Warning and Precautions

Ibuprofen and ibuprofen lysine are both available for parenteral use. Ibuprofen lysine is indicated specifically for closing patent ductus arteriosus (PDA) in premature infants; regular ibuprofen is not an appropriate substitute.

Like many widely used medications, there is increasing concern about the presence of ibuprofen in the environment and the long-term effects of environmental ibuprofen exposure. Recent studies have explored potential bioremediation methods of ibuprofen in the atmosphere via bacterial strains, mineral particles, and solar radiation. The toxicity of ibuprofen's metabolites is minimal compared to ibuprofen's toxicity. Furthermore, studies have also demonstrated ibuprofen's low toxicity in tested organisms and no observable mutagenic activity of the drug. Concerns persist regarding the potential indirect effects of ibuprofen on prostaglandin-regulated processes in the environment, including ovulation, menstruation, inflammation, and pain.[69][70]

Monitoring

Appropriate monitoring should minimize the possibility of common and uncommon adverse effects associated with ibuprofen therapy. Pain relief and gastrointestinal symptoms should be documented during a patient’s clinical evaluation, as they may suggest desensitization to the analgesic effect of ibuprofen or emerging gastritis or GI bleeding. Blood pressure should also be monitored, especially in older adults or patients with hypertension.[60][61] Renal function monitoring is also recommended, given NSAIDs nephrotoxic effects in at-risk and healthy patients.[56][57]

Liver function is not typically monitored in patients receiving ibuprofen. However, documented NSAID-induced liver injury in pediatric patients suggests the need for monitoring in individuals with high-risk factors or at-risk populations. NSAID-induced liver damage occurs less frequently than in patients receiving acetaminophen. However, there is no antidote for liver damage resulting from NSAID use.[71] Increasing ibuprofen administration to children suggests the need for further study regarding the effect of NSAIDs on liver function.

Toxicity

Signs and Symptoms of Overdose

Ibuprofen's toxic potential is derived from its inhibition of the cyclooxygenase pathway and the subsequent effects on various cellular processes and multiple organ systems. Prostaglandins and thromboxanes help maintain the gastric mucosal layer and renal blood flow; ibuprofen is associated with a mildly elevated risk of adverse gastrointestinal and renal events, even at therapeutic levels. Ibuprofen is the most common NSAID involved in overdose cases; 29% of overdoses are the result of ibuprofen ingestion alone. Patients can also overdose by ingesting ibuprofen combined with other analgesics.[72] One study created a risk score for improving the risk-benefit ratio of NSAID administration; this score was accurate in categorizing the one-year risk of significant toxicity among NSAID users.[73]

Reye syndrome is an increasingly rare presentation, primarily due to international efforts to curb aspirin usage since the 1980s. Restricted aspirin administration to children in the United Kingdom reduced the incidence of Reye syndrome from 100 cases in 1984 to 3 cases in 2000.[71] NSAIDs damage the mitochondria in hepatocytes, precipitating Reye syndrome.[74] Furthermore, the mechanism of NSAID-induced liver damage remains largely unknown. Due to the increasing use of ibuprofen in children, the possibility of increased rates of drug-induced liver damage and Reye syndrome should be considered.[71]

The maximum recommended daily dose of ibuprofen is 3200 mg. Overdosing on ibuprofen can cause severe toxicity, particularly in children ingesting 400 mg/kg or more. Complications of overdose include seizures, apnea, hypertension, and potential renal and hepatic dysfunction. Chronic administration of high-dose ibuprofen is also associated with increased risks of myocardial infarction.[42]

Management of Overdose

There is no available antidote for ibuprofen. The toxicity resolves with time and supportive care. The management of severe ibuprofen toxicity typically involves supportive care and interventions like continuous renal replacement therapy (CRRT) or hemodialysis (HD). Despite ibuprofen's large molecule size and high protein binding, which typically limits dialysis clearance, CRRT can stabilize metabolic balance and support hemodynamics. In patients with significant metabolic acidosis and hemodynamic instability, CRRT may be initiated to facilitate the gradual elimination of ibuprofen and restore homeostasis, even though it does not acutely remove the drug.[75]

Selective Plasma Adsorption (SPAD) has demonstrated potential as a treatment for severe ibuprofen overdose. This process uses albumin dialysate to eliminate highly protein-bound toxins, improving outcomes for patients with multi-organ failure and shock.[76]

Enhancing Healthcare Team Outcomes

Successful medication-based treatment requires updated clinical knowledge, a thorough understanding of the patient, and realistic treatment goals based on current evidence. The primary clinician, physicians, advanced practice providers (eg, NPs PAs), nursing staff, and pharmacists collaborate to ensure the highest quality of patient care involving ibuprofen therapy by adhering to the following principles:

Providers should only prescribe ibuprofen for the recommended FDA-approved or off-label indications while considering contraindications or factors that increase the risk of adverse effects.

Any patient-reported ibuprofen use should be documented, including the frequency and dosage. Nursing staff may obtain and report this information to the attending physician.

Any patient with suspected gastritis, ulceration, anemia, or thrombocytopenia should be asked about ibuprofen use.

Ibuprofen toxicity should be considered when assessing patients who have overdosed on an unknown substance.

Ibuprofen may be administered for primary diagnosis or mild to moderate symptomatic control in patients experiencing pain.[28][22][14][15][5]

NSAIDs such as ibuprofen have demonstrated potential as anticancer agents and should be considered as components of cancer treatment regimens when appropriate and supported by recent research.

Aspirin and other NSAIDs are recommended for colorectal cancer and cardiovascular disease prevention.

Appropriate monitoring of pain levels, new GI complaints, blood pressure, and renal function reduces the risk of adverse effects associated with NSAID therapy. Nursing staff can contribute significantly to this effort.[57][61]

Alternating acetaminophen and ibuprofen doses for pediatric patients can reduce refractory fever more effectively than ibuprofen monotherapy.[10]

Ibuprofen and indomethacin are equally effective for closing a PDA in neonatal patients. However, ibuprofen is associated with reduced rates of nephrotoxicity and systemic vasoconstriction.[6] Pediatric/neonatal specialty nurses and pharmacists should collaborate to ensure safe administration to these patients.

Intravenous ibuprofen is compatible with some total parenteral nutrition formulations. These combinations can be administered simultaneously to neonates with PDA.[40]

Ibuprofen or aspirin should be administered with colchicine to relieve acute pericarditis and reduce recurrent pericarditis.[19]

Awareness of these evidence-based principles can improve monitoring and outcomes for patients who may benefit from ibuprofen therapy. An interprofessional team approach and communication among clinicians (MDs, DOs, NPs, PAs), pharmacists, and nurses are crucial to preventing adverse reactions and improving outcomes for patients receiving ibuprofen.

Review Questions

References

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Disclosure: Vincent Trung Ngo declares no relevant financial relationships with ineligible companies.

Disclosure: Tushar Bajaj declares no relevant financial relationships with ineligible companies.