Comparative Pharmacology
Head-to-head clinical analysis: RIFAXIMIN versus VIBATIV.
Peer-Reviewed Evidence
Head-to-head clinical analysis: RIFAXIMIN versus VIBATIV.
RIFAXIMIN vs VIBATIV
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Rifaximin is a non-aminoglycoside, semi-synthetic antibiotic derived from rifamycin that inhibits bacterial RNA synthesis by binding to the beta-subunit of bacterial DNA-dependent RNA polymerase, thereby blocking transcription.
Lipoglycopeptide antibiotic that inhibits cell wall synthesis by binding to the D-Ala-D-Ala terminus of peptidoglycan precursors, blocking transglycosylation and transpeptidation. Also disrupts membrane potential and increases membrane permeability.
550 mg orally three times daily for 14 days for travelers' diarrhea; 200 mg orally three times daily for 3 days for irritable bowel syndrome with diarrhea; 400 mg orally three times daily for 7 days for hepatic encephalopathy.
10 mg/kg intravenously once every 24 hours, infused over 60 minutes for 7 to 14 days.
None Documented
None Documented
Clinical Note
moderateRifaximin + Digoxin
"The serum concentration of Digoxin can be increased when it is combined with Rifaximin."
Clinical Note
moderateRifaximin + Levofloxacin
"The serum concentration of Levofloxacin can be increased when it is combined with Rifaximin."
Clinical Note
moderateRifaximin + Estrone sulfate
"The serum concentration of Estrone sulfate can be decreased when it is combined with Rifaximin."
Clinical Note
moderateRifaximin + Tranilast
The terminal elimination half-life is approximately 1.8 to 2.5 hours in patients with normal hepatic function. Due to negligible systemic absorption, the half-life has limited clinical relevance; drug action is largely confined to the gastrointestinal tract.
Terminal elimination half-life is approximately 177 hours (7.4 days), supporting once-daily dosing.
Rifaximin is primarily eliminated in feces as unchanged drug (>96% of an oral dose). Renal excretion is negligible (<0.4%). Biliary excretion is minimal due to poor systemic absorption.
Primarily renal excretion as unchanged drug (approximately 93% of dose recovered in urine; <5% in feces).
Category A/B
Category C
Antibiotic
Antibiotic
"The serum concentration of Tranilast can be decreased when it is combined with Rifaximin."