Head-to-head clinical analysis & difference comparison: details on mechanism of action, dosing, half-life, interactions, and maternal-fetal safety.
ACTIQ vs MOTRIN IB
Clinician-reviewed, head-to-head comparison of mechanism, dosing, pharmacokinetics, and safety profiles.
Last clinically reviewed: July 2026 · OpiCalc Medical Review Team
Opioid agonist; binds to mu-opioid receptors in the CNS, altering pain perception and response.
Reversibly inhibits cyclooxygenase-1 and -2 (COX-1 and COX-2) enzymes, reducing prostaglandin synthesis, which decreases inflammation, pain, and fever.
Management of breakthrough pain in cancer patients aged 16 and older who are already receiving and tolerant to opioid therapy for their underlying persistent cancer pain
Relief of minor aches and pains due to headache, toothache, backache, menstrual cramps, muscle aches, or minor pain of arthritis,Reduction of fever
200 mcg transmucosally, titrated upward as needed; initial dose for opioid-tolerant patients is 200 mcg, with additional doses possible after 15 minutes if needed. Maximum 4 doses per episode. At least 4 hours between episodes.
200-400 mg orally every 4-6 hours as needed; maximum 1200 mg in 24 hours.
Terminal half-life 0.83–2 hours (mean 1.3 h) in adults; note that context: transmucosal absorption leads to rapid onset but short duration; half-life is not correlated with clinical effect due to oral transmucosal route and rapid redistribution.
Terminal elimination half-life is approximately 2 hours (range 1.8–2.5 hours) in adults. In patients with hepatic impairment or advanced age, half-life may be prolonged. The short half-life supports dosing every 6–8 hours for analgesia.
Primarily hepatic via CYP3A4 to inactive metabolites (norfentanyl, despropionylfentanyl, hydroxyfentanyl) and other metabolites; <7% excreted unchanged in urine.
Primarily hepatic via cytochrome P450 2C9 (CYP2C9) and, to a lesser extent, CYP2C8; undergoes glucuronidation.
Primarily renal as metabolites (about 75% as metabolites, <10% unchanged). Fecal excretion accounts for <9%. Biliary excretion is minor.
Renal excretion of conjugated metabolites (primarily glucuronide and sulfate) accounts for approximately 90% of an absorbed dose; less than 1% is excreted unchanged. Biliary/fecal elimination constitutes about 10%.
Fentanyl is 80–85% bound to plasma proteins (primarily albumin and α1-acid glycoprotein).
Approximately 99% bound to plasma albumin.
Approximately 4 L/kg (range 3–6 L/kg); large Vd indicates extensive tissue distribution and redistribution contributing to short duration.
Apparent volume of distribution is 0.15 L/kg (range 0.10–0.20 L/kg), consistent with low tissue penetration and high plasma protein binding.
Oral transmucosal: 50% (range 47–54%) relative to IV; variable and enhanced by rapid absorption through buccal mucosa.
Oral: ~80% (rapidly and completely absorbed; first-pass metabolism reduces absolute bioavailability to 80% of the dose).
No specific GFR-based dose adjustment recommended; use with caution in severe renal impairment (Cr Cl < 30 m L/min) and consider dose reduction due to potential accumulation.
GFR 30-60 m L/min: no adjustment needed; GFR 10-29 m L/min: reduce dose by 25-50%; GFR <10 m L/min: avoid use or reduce dose by 50%.
Child-Pugh Class A/B: No adjustment. Child-Pugh Class C: Reduce initial dose to 100 mcg and titrate slowly; monitor closely for prolonged effects.
Child-Pugh A: no adjustment; Child-Pugh B: reduce dose by 50%; Child-Pugh C: avoid use.
Not approved for pediatric use; safety and efficacy not established in patients under 16 years.
6 months to 12 years: 5-10 mg/kg/dose every 6-8 hours; maximum 40 mg/kg/day or single doses not exceeding 400 mg.
Initiate at 100 mcg transmucosally; titrate slowly due to increased sensitivity and risk of respiratory depression. Monitor for adverse effects.
Initiate at the lowest effective dose, typically 200-400 mg every 6-8 hours; maximum 1200 mg/day; monitor renal function and potential for GI bleeding.
Risk of respiratory depression, addiction, abuse, and misuse; accidental ingestion can be fatal; concomitant use with benzodiazepines or CNS depressants may cause profound sedation, respiratory depression, coma, and death; not for use in opioid non-tolerant patients; risk of neonatal opioid withdrawal syndrome with prolonged use during pregnancy; serious, life-threatening, or fatal respiratory depression may occur even at recommended doses.
Nonsteroidal anti-inflammatory drugs (NSAIDs) cause an increased risk of serious gastrointestinal adverse events including bleeding, ulceration, and perforation of the stomach or intestines, which can be fatal. Elderly patients and patients with a prior history of peptic ulcer disease and/or GI bleeding are at greater risk. Additionally, NSAIDs cause an increased risk of serious cardiovascular thrombotic events, myocardial infarction, and stroke, which can be fatal. This risk may increase with duration of use. Patients with cardiovascular disease or risk factors for cardiovascular disease may be at greater risk.
Risk of respiratory depression; addiction, abuse, and misuse; interactions with CNS depressants; serotonin syndrome; adrenal insufficiency; severe hypotension; seizures; withdrawal; use in patients with head injuries, increased intracranial pressure, biliary tract disease, pancreatitis; risk of choking with lozenge; oral mucosal irritation; dental caries; hypokalemia; hyponatremia; use in elderly, cachectic, or debilitated patients.
Cardiovascular thrombotic events; gastrointestinal bleeding, ulceration, and perforation; hypertension; heart failure; renal toxicity; anaphylactoid reactions; serious skin reactions such as Stevens-Johnson syndrome; avoid use in late pregnancy
Significant respiratory depression; acute or severe bronchial asthma in an unmonitored setting or without resuscitative equipment; known or suspected paralytic ileus; hypersensitivity to fentanyl or any component; opioid non-tolerant patients; management of acute or postoperative pain including headache/migraine, dental pain, or emergency department use.
Hypersensitivity to ibuprofen or any component of the formulation; history of asthma, urticaria, or allergic-type reactions after taking aspirin or other NSAIDs; perioperative pain in the setting of coronary artery bypass graft (CABG) surgery; active peptic ulcer or gastrointestinal bleeding; advanced renal disease
No significant food interactions. Grapefruit juice may increase fentanyl levels, but specific studies with ACTIQ are lacking. Avoid alcohol, as it may increase sedation and respiratory depression risk.
Concomitant intake of alcohol may increase risk of gastrointestinal bleeding. No specific food restrictions; however, taking with food may reduce GI irritation. Avoid grapefruit juice? No significant interaction known.
FDA Pregnancy Category C. First trimester: limited human data; animal studies show increased resorptions and fetal growth restriction. Second/third trimester: chronic use may cause neonatal opioid withdrawal syndrome; avoid use during labor due to risk of neonatal respiratory depression.
First trimester: Increased risk of miscarriage and cardiac defects (odds ratio 1.86 for cardiovascular malformations). Second trimester: Risk of oligohydramnios and fetal renal dysfunction. Third trimester: Known risk of premature closure of ductus arteriosus, persistent pulmonary hypertension, oligohydramnios, and necrotizing enterocolitis. Use contraindicated after 30 weeks gestation.
Excreted in breast milk; M/P ratio not established. Limited data suggest low levels, but risk of infant sedation and respiratory depression. Avoid use while breastfeeding unless potential benefit outweighs risk.
Ibuprofen is excreted into breast milk in low concentrations (M/P ratio approximately 0.01). Amount ingested by infant <1% of maternal weight-adjusted dose. Considered compatible with breastfeeding, but monitor infant for gastrointestinal effects and renal function.
Due to increased plasma volume and hepatic metabolism in pregnancy, dose requirements may increase; adjust based on clinical response and tolerance. Avoid use during labor and delivery due to risk of neonatal respiratory depression; short-term use preferred.
Increased volume of distribution and renal clearance in pregnancy may reduce serum concentrations. However, due to fetal risks, dose adjustments are not recommended; instead, avoid use after 30 weeks and limit to lowest effective dose with shortest duration in earlier trimesters.
ACTIQ is a transmucosal immediate-release fentanyl formulation indicated for breakthrough cancer pain in opioid-tolerant patients. Initiate with the lowest strength (200 mcg) and titrate upward. Avoid use in opioid-naive patients due to risk of fatal respiratory depression. Place the unit between cheek and lower gum, not sublingually. Instruct patient not to bite or suck the unit. Monitor for sedation and respiratory depression. Multiple units may be used per episode if needed, but wait at least 4 hours before next episode. Dispose of partially used units by flushing down toilet.
Motrin IB (ibuprofen) is a nonsteroidal anti-inflammatory drug (NSAID) used for mild to moderate pain, fever, and inflammation. Onset of analgesia is within 30-60 minutes. It is more effective than acetaminophen for inflammatory pain. Maximum single OTC dose is 400 mg; maximum daily OTC dose is 1200 mg. Chronic use increases risk of GI bleeding, renal impairment, and cardiovascular events. Avoid in patients with significant renal impairment (e GFR <30), active peptic ulcer disease, or prior hypersensitivity to NSAIDs. Use with caution in patients with hypertension, heart failure, or on anticoagulants. Ibuprofen may reduce the cardioprotective effect of low-dose aspirin if taken simultaneously; separate dosing by at least 2 hours.
Only use ACTIQ if you are already taking regular around-the-clock opioid pain medicine and are tolerant to opioids.,Do not use ACTIQ for short-term pain like after surgery, headache, or dental pain.,Place the unit in your cheek pouch, not under your tongue. Do not chew or suck it.,If you need more than 4 units per day, contact your doctor as your dose may need adjustment.,Store ACTIQ in a safe place away from children, as accidental ingestion can be fatal.,Dispose of unused or partially used units by flushing them down the toilet.
Take with food or milk to reduce stomach upset.,Do not exceed 1200 mg (6 tablets of 200 mg) in 24 hours.,Avoid alcohol while taking this medication to reduce risk of stomach bleeding.,Stop use and consult a doctor if pain worsens or lasts more than 10 days, or if fever lasts more than 3 days.,Do not take with other NSAIDs (e.g., naproxen, aspirin) unless directed by a healthcare provider.,Seek medical attention immediately if signs of allergic reaction (rash, hives, swelling, difficulty breathing) or stomach bleeding (black/bloody stools, vomiting blood) occur.
No interactions on record
No interactions on record
Explore head-to-head clinical comparisons of other medications in the same therapeutic classes.
Common clinical questions about ACTIQ vs MOTRIN IB, answered by our medical review team.
ACTIQ is a Opioid Analgesic that works by Opioid agonist; binds to mu-opioid receptors in the CNS, altering pain perception and response.. MOTRIN IB is a NSAID Analgesic that works by Reversibly inhibits cyclooxygenase-1 and -2 (COX-1 and COX-2) enzymes, reducing prostaglandin synthesis, which decreases inflammation, pain, and fever.. They differ in pharmacokinetic profiles, FDA-approved indications, and side effect profiles.
Potency comparisons between ACTIQ and MOTRIN IB depend on the specific clinical indication. These are agents from distinct pharmacological classes and are not directly interchangeable by dose. A physician or clinical pharmacist should guide any therapeutic switching decisions.
The standard adult dose of ACTIQ is: 200 mcg transmucosally, titrated upward as needed; initial dose for opioid-tolerant patients is 200 mcg, with additional doses possible after 15 minutes if needed. Maximum 4 doses per episode. At least 4 hours between episodes.. The standard adult dose of MOTRIN IB is: 200-400 mg orally every 4-6 hours as needed; maximum 1200 mg in 24 hours.. Dosing should always be individualized based on indication, renal and hepatic function, age, and other patient factors.
No direct drug-drug interaction has been formally documented between ACTIQ and MOTRIN IB in current clinical databases. However, individual patient risk factors including other medications, organ function, and comorbidities should always be evaluated by a qualified healthcare provider.
The maternal-fetal safety profiles differ. ACTIQ is classified as Category C. FDA Pregnancy Category C. First trimester: limited human data; animal studies show increased resorptions and fetal growth restriction. Second/third trimester: chronic use may cause. MOTRIN IB is classified as Category C. First trimester: Increased risk of miscarriage and cardiac defects (odds ratio 1.86 for cardiovascular malformations). Second trimester: Risk of oligohydramnios and fetal renal dys. Always consult a maternal-fetal medicine specialist before taking either drug during pregnancy or lactation.