Home | Curry International Tuberculosis Center
Provider Fact Sheet
4 months Rifampin (RIF)
Latent TB Infection (LTBI)
Used for improved adherence with shorter regimen, INH-resistant or
INH-intolerant
Overview
While rifampin capsules are more expensive than isoniazid (INH), the improved adherence to the 4-month regimen makes this a very attractive – and ultimately cost-effective – regimen (also great for INH-resistant / RIF-susceptible infections or for kids who don’t tolerate INH).
Adults
Rifampin 10 mg/kg/day in a single daily dose up to 600 mg daily for 4 months.
Children
Rifampin 15 – 20 mg/kg/day in a single daily dose up to 600 mg for 4 months.
General
Rifampin comes as 150 mg and 300 mg orange/red capsules. Some insurance companies cover one, but not the other strength. There is no commercially available suspension, though pharmacists will suspend a poorly homogeneous, unstable liquid upon request. Alternatively, the capsules can be jiggled opened into a dark colored, strongly flavored soft vehicle for children daily. For children, I suggest making a layer of vehicle on the bottom of a spoon, putting a layer of rifampin powder (from opening the capsule) and then topping with more of the yummy vehicle (chocolate whipped cream, syrup, jelly, etc.). If the child can swallow the spoonful without chewing, this trick works pretty well. Try it without the rifampin first to get them used to swallowing without chewing.
You can also buy “simple syrup” or “power shots” flavoring at the local pharmacy and mix RIF in one of these sugary liquids each day.
Rifampin discolors urine and tears. Soft contact lenses will be stained by rifampin.
Rifampin interacts with many prescription drugs including coumadin, oral contraceptives, HIV therapies, methadone, some anti-rejection drugs, clarithromycin and many others.
Review patients’ current medications and advise them to inform other providers that they are taking rifampin.
Toxicity
Potential toxicities include gastrointestinal upset, rash, hepatotoxicity, hypersensitivity and a flu-like syndrome. Routine laboratory monitoring is not indicated unless there are underlying issues or medications.
Pediatric Rifampin daily dosing
|Child's weight |Daily Rifampin dose |
|Kilograms |Pounds |Milligrams |150 mg cap |300 mg cap |
|Up to 5 kg |Up to 11 # |75 mg |1/2 |0 |
|5.1 - 10 |11.1 - 22 |150 mg |1 |0 |
|10.1 - 15 |22.1 - 33 |225 mg |1 1/2 |0 |
|15.1 - 20 |33.1 - 44 |300 mg |0 |1 |
|20.1 - 30 |44.1 - 66 |450 mg |1 |1 |
|> 30 kg |> 66 # |600 mg |0 |2 |
|Maximum daily rifampin dose is 600 mg |
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