Strength500 mg
Formoral.solid
Adult dose and duration1 g three or four times daily, maximum 4 g in 24 hours - While the pain lasts; not a reason to delay admission by a single hour
Paediatric dose15 mg/kg/dose [child max 500 mg]
(15 mg/kg per dose three or four times daily from 1 month of age, maximum 60 mg/kg per day. Under 1 month, 10 mg/kg per dose three or four times daily, maximum 40 mg/kg per day. In severe acute malnutrition MSF reduces it to 10 mg/kg up to three times in 24 hours. Pancreatitis in a child is uncommon and always an admission.)
Dose by weight| 3kg | 45 mg/dose |
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| 4kg | 60 mg/dose |
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| 5kg | 75 mg/dose |
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| 6kg | 90 mg/dose |
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| 7kg | 105 mg/dose |
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| 8kg | 120 mg/dose |
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| 9kg | 135 mg/dose |
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| 10kg | 150 mg/dose |
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| 11kg | 165 mg/dose |
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| 12kg | 180 mg/dose |
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| 13kg | 195 mg/dose |
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| 14kg | 210 mg/dose |
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| 15kg | 225 mg/dose |
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| 16kg | 240 mg/dose |
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| 17kg | 255 mg/dose |
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| 18kg | 270 mg/dose |
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| 19kg | 285 mg/dose |
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| 20kg | 300 mg/dose |
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| 21kg | 315 mg/dose |
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| 22kg | 330 mg/dose |
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| 23kg | 345 mg/dose |
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| 24kg | 360 mg/dose |
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| 25kg | 375 mg/dose |
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| 26kg | 390 mg/dose |
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| 27kg | 405 mg/dose |
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| 28kg | 420 mg/dose |
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| 29kg | 435 mg/dose |
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| 30kg | 450 mg/dose |
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| 31kg | 465 mg/dose |
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| 32kg | 480 mg/dose |
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| 33kg | 495 mg/dose |
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| 34kg | 500 mg/dose (capped) |
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| 35kg | 500 mg/dose (capped) |
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| 36kg | 500 mg/dose (capped) |
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| 37kg | 500 mg/dose (capped) |
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| 38kg | 500 mg/dose (capped) |
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| 39kg | 500 mg/dose (capped) |
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| 40kg | 500 mg/dose (capped) |
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| 41kg | 500 mg/dose (capped) |
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| 42kg | 500 mg/dose (capped) |
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| 43kg | 500 mg/dose (capped) |
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| 44kg | 500 mg/dose (capped) |
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| 45kg | 500 mg/dose (capped) |
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| 46kg | 500 mg/dose (capped) |
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| 47kg | 500 mg/dose (capped) |
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| 48kg | 500 mg/dose (capped) |
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| 49kg | 500 mg/dose (capped) |
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| 50kg | 500 mg/dose (capped) |
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Dose sourceMSF Essential Drugs 2024 - paracetamol (oral): adult 1 g 3 or 4 times daily, maximum 4 g daily; child 1 month and over 15 mg/kg 3 or 4 times daily, maximum 60 mg/kg daily; child under 1 month 10 mg/kg 3 or 4 times daily, maximum 40 mg/kg daily. The 500 mg per-dose ceiling used in the weight table is MSF's own top paediatric band, one 500 mg tablet three times daily from 30 to under 50 kg.
WhyThe pancreatitis article puts pain management on the World Health Organization's analgesic ladder and names acetaminophen among the non-opioid adjuncts that may add benefit in selected patients. It is the only analgesic on that card that a general practice can give while the admission is arranged, and it does not carry the nephrotoxic and gastric risks that make an NSAID a poor choice in a hypovolaemic patient.
Cautions- AN ADJUNCT ONLY, AND NOT THE MAIN TREATMENT. The article says most patients need step 3 of the analgesic ladder - intravenous opioids, with hydromorphone and fentanyl preferred and meperidine avoided for its neurotoxicity - and it names those agents without stating a dose for any of them, so none is printed here. The opioid is given by the admitting team.
- Emergency admission comes first. Sudden severe epigastric pain boring through to the back, with amylase or lipase three or more times the upper limit of normal, or the imaging, makes the diagnosis; the article warns against waiting for a lipase result in a patient who looks unwell.
- Fluid, not analgesia, is the cornerstone of the first hours, and it is given intravenously in hospital. The article's preferred fluid is lactated Ringer solution, and it now favours moderate individualised resuscitation over the aggressive approach: the WATERFALL trial gave a 10 mL/kg bolus only if the patient was hypovolaemic, then 1.5 mL/kg per hour, against 20 mL/kg then 3 mL/kg per hour, and stopped early because fluid overload reached 20.5% in the aggressive arm against 3.3%, with no clinical benefit. The goal is urine output above 0.5 mL/kg per hour.
- Prophylactic antibiotics are NOT given for sterile necrosis. The article reserves antimicrobials for a confirmed or strongly suspected infection such as cholangitis, infected necrosis, pneumonia or urinary tract infection.
- Check every other product the patient is taking for paracetamol - cold and flu sachets are the usual route to an accidental overdose - and reduce the maximum in liver disease, which matters here because alcohol is one of the two commonest causes of the pancreatitis itself.
- Gallstones and alcohol account for most cases, so the cause has to be pursued after recovery; untreated, it recurs.