Comparative Pharmacology
Head-to-head clinical analysis: PEPCID COMPLETE versus ZANTAC.
Peer-Reviewed Evidence
Head-to-head clinical analysis: PEPCID COMPLETE versus ZANTAC.
PEPCID COMPLETE vs ZANTAC
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Famotidine competitively inhibits histamine at H2-receptors of gastric parietal cells, reducing gastric acid secretion. Calcium carbonate and magnesium hydroxide act as antacids to neutralize existing gastric acid.
Competitive antagonist of histamine at H2 receptors on gastric parietal cells, reducing basal and stimulated gastric acid secretion.
One tablet (famotidine 10mg, calcium carbonate 800mg, magnesium hydroxide 165mg) orally once daily, taken 30 minutes before a meal that causes heartburn.
150 mg orally twice daily or 50 mg intravenously every 6-8 hours. Alternatively, 300 mg orally at bedtime.
None Documented
None Documented
2.5-3.5 hours (prolonged to 12-20 hours in severe renal impairment, CrCl <10 mL/min).
2.5-3 hours (normal renal function); prolonged to 4-5 hours in elderly and up to 20 hours in severe renal impairment (CrCl < 30 mL/min).
Renal: 65-70% (famotidine unchanged); fecal: 30-35% (as metabolites). Biliary elimination is minimal (<5%).
Renal: 30% unchanged (tubular secretion); hepatic metabolism to N-oxide, S-oxide, and desmethyl ranitidine; biliary/fecal: minimal.
Category C
Category C
H2 Receptor Antagonist
H2 Receptor Antagonist