CHILDREN'S ADVIL
Clinical safety rating: caution
Comprehensive clinical and safety monograph for CHILDREN'S ADVIL (CHILDREN'S ADVIL).
Ibuprofen is a nonsteroidal anti-inflammatory drug (NSAID) that inhibits cyclooxygenase (COX-1 and COX-2) enzymes, reducing prostaglandin synthesis. This leads to decreased pain, inflammation, and fever through peripheral and central mechanisms.
| Metabolism | Primarily hepatic via CYP2C9 and CYP2C8. Undergoes glucuronidation and renal excretion. Active metabolite (2-hydroxyibuprofen, carboxyibuprofen) is inactive. |
| Excretion | Renal excretion of conjugated metabolites (glucuronide and sulfate) accounts for ~90% of the administered dose. Less than 5% is excreted unchanged in urine. Biliary/fecal elimination is minor (<5%). |
| Half-life | Terminal elimination half-life is 1.9–2.3 hours in children. In neonates, half-life is prolonged (up to 6 hours). Clinical context: Requires dosing every 6–8 hours for sustained antipyresis. |
| Protein binding | Ibuprofen is >99% bound to plasma albumin at therapeutic concentrations. |
| Volume of Distribution | 0.1–0.3 L/kg in children. Clinical meaning: Low Vd indicates limited tissue distribution, primarily confined to extracellular fluid and plasma. |
| Bioavailability | Oral suspension: ~85–100% (well absorbed). Rectal suppository: ~75% relative to oral. |
| Onset of Action | Oral: 15–30 minutes for antipyretic effect; 30–60 minutes for analgesic effect. |
| Duration of Action | 4–6 hours after a single oral dose. Clinical note: Duration may be shorter in children with rapid metabolism; fever reduction typically lasts 6–8 hours. |
Ibuprofen 200-400 mg orally every 4-6 hours as needed; maximum 1200 mg/day without prescription.
| Dosage form | TABLET, CHEWABLE |
| Renal impairment | GFR 30-59 mL/min: use lowest effective dose, monitor renal function. GFR <30 mL/min: contraindicated. |
| Liver impairment | Child-Pugh A: no adjustment. Child-Pugh B: use caution, consider dose reduction. Child-Pugh C: contraindicated. |
| Pediatric use | Based on weight: 5-10 mg/kg/dose every 6-8 hours; maximum 40 mg/kg/day. For fever: 5-10 mg/kg/dose. For pain: 10 mg/kg/dose. Use children's suspension (100 mg/5 mL). |
| Geriatric use | Start at lowest effective dose (200 mg every 6-8 hours), monitor renal function and GI bleeding risk; avoid prolonged use. |
| 1st trimester | Consult provider |
| 2nd trimester | Consult provider |
| 3rd trimester | Consult provider |
Clinical note
Comprehensive clinical and safety monograph for CHILDREN'S ADVIL (CHILDREN'S ADVIL).
| Breastfeeding | Ibuprofen is excreted into breast milk in low levels (M/P ratio approximately 0.6–1.0). Considered compatible with breastfeeding due to minimal infant exposure at standard maternal doses. Monitor infant for potential adverse effects such as gastrointestinal upset or bleeding. |
| Teratogenic Risk | First trimester: Association with increased risk of miscarriage and congenital malformations (cardiac defects, gastroschisis) based on epidemiological studies. Avoid use. Second and third trimesters: Can cause premature closure of the ductus arteriosus, oligohydramnios, and fetal renal dysfunction. Use contraindicated after 30 weeks gestation. |
■ FDA Black Box Warning
Boxed Warning: NSAIDs cause an increased risk of serious cardiovascular thrombotic events, including myocardial infarction and stroke, which can be fatal. Risk is increased with duration of use and in patients with cardiovascular risk factors. Contraindicated for treatment of perioperative pain in the setting of coronary artery bypass graft (CABG) surgery.
| Serious Effects |
["Absolute: Known hypersensitivity to ibuprofen or any NSAID; history of asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs; perioperative pain in CABG surgery; active peptic ulcer disease or GI bleeding; advanced renal disease.","Relative: Cardiovascular disease (use with caution); pregnancy (especially third trimester); concurrent use of anticoagulants or antiplatelet agents; elderly patients; dehydration."]
| Precautions | ["Cardiovascular risk: Avoid in patients with recent MI or stroke; increased risk of thrombosis.","Gastrointestinal risk: Can cause GI bleeding, ulceration, and perforation; use with caution in patients with history of peptic ulcer disease.","Renal effects: Can cause renal impairment, especially in dehydrated patients or those with pre-existing renal disease.","Hepatic effects: Rare hepatotoxicity; monitor LFTs in long-term use.","Anaphylactoid reactions: Can occur in aspirin-sensitive patients.","Fluid retention and edema: Use with caution in patients with hypertension or heart failure.","Pregnancy: Avoid in third trimester (risk of premature closure of ductus arteriosus)."] |
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| Fetal Monitoring | Monitor maternal renal function and blood pressure. Assess amniotic fluid volume via ultrasound with prolonged use. Fetal echocardiogram to evaluate ductus arteriosus patency if used in second trimester. Monitor for signs of bleeding (e.g., vaginal bleeding) in mother and fetus. |
| Fertility Effects | Reversible impairment of ovulation due to prostaglandin synthesis inhibition. Use may delay conception but does not cause permanent fertility damage. Discontinuation restores normal ovulation. |
| Food/Dietary | No specific food restrictions but take with food or milk to minimize GI upset. |
| Clinical Pearls | Onset of analgesia within 20-30 min; duration ~4-6h. Max single dose 10 mg/kg, max daily 40 mg/kg. Use weight-based dosing, not age. Caution in dehydration, renal impairment, bleeding disorders. Not recommended <6 months. Avoid concurrent NSAIDs. Risk of Reye syndrome with varicella or influenza? No, that's aspirin; ibuprofen not associated. |
| Patient Advice | Use weight-based dosing; do not exceed recommended dose. · Do not use with other ibuprofen or NSAIDs. · Take with food or milk to reduce stomach upset. · Shake bottle well before each use. · Use the dosing device provided, not household spoons. · Do not give more than 4 times in 24 hours. · Stop use and consult doctor if pain worsens or lasts >3 days. · Keep out of reach of children. |