Comparative Pharmacology
Head-to-head clinical analysis: DIPHENOXYLATE HYDROCHLORIDE AND ATROPINE SULFATE versus LOMANATE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: DIPHENOXYLATE HYDROCHLORIDE AND ATROPINE SULFATE versus LOMANATE.
DIPHENOXYLATE HYDROCHLORIDE AND ATROPINE SULFATE vs LOMANATE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Diphenoxylate is a synthetic opioid agonist that acts on mu-opioid receptors in the gastrointestinal tract to reduce peristalsis and prolong transit time. Atropine is added in subtherapeutic doses to discourage intentional overdose and provides anticholinergic effects.
LOMANATE is a combination of diphenoxylate (a peripheral opioid receptor agonist that slows GI motility) and atropine (an anticholinergic that discourages abuse).
Each tablet contains diphenoxylate HCl 2.5 mg and atropine sulfate 0.025 mg. Adults: 2 tablets orally 4 times daily until diarrhea controlled, then reduce dose. Maximum 8 tablets per day for 2 days.
100 mg orally twice daily
None Documented
None Documented
Diphenoxylate: 2.5-12 hours (parent drug); difenoxin (active metabolite): 12-14 hours. Atropine: 2-4 hours. Clinical context: extended half-life of difenoxin allows twice-daily dosing for antidiarrheal effect.
Terminal elimination half-life is 18-24 hours in adults with normal renal function; prolonged to 40-60 hours in severe renal impairment (CrCl < 30 mL/min), requiring dose adjustment.
Diphenoxylate is primarily excreted in feces via biliary elimination (approx. 50%) and renal excretion (approx. 50% as metabolites); atropine is mainly excreted renally (30-50% unchanged and metabolites).
Primarily renal (80% as unchanged drug and metabolites); biliary/fecal (15%); 5% eliminated via other routes.
Category C
Category C
Antidiarrheal
Antidiarrheal