Comparative Pharmacology
Head-to-head clinical analysis: RIFAXIMIN versus UCEPHAN.
Peer-Reviewed Evidence
Head-to-head clinical analysis: RIFAXIMIN versus UCEPHAN.
RIFAXIMIN vs UCEPHAN
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.
UCEPHAN (eculizumab) is a monoclonal antibody that binds to complement protein C5, inhibiting its cleavage to C5a and C5b, thereby preventing the formation of the membrane attack complex (MAC) and terminal complement-mediated cell lysis.
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.
500 mg orally every 12 hours or 250 mg orally every 8 hours.
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 2.1 ± 0.5 hours in adults with normal renal function; prolonged to 20–50 hours in severe renal impairment (CrCl <10 mL/min).
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.
Approximately 70–80% of an administered dose is eliminated unchanged in urine via glomerular filtration and tubular secretion; the remainder (20–30%) is eliminated via biliary/fecal routes, with <5% as metabolites.
Category A/B
Category C
Antibiotic
Antibiotic, Cephalosporin
"The serum concentration of Tranilast can be decreased when it is combined with Rifaximin."