Comparative Pharmacology
Head-to-head clinical analysis: AMMONIUM CHLORIDE versus GUAIFENESIN AND DEXTROMETHORPHAN HYDROBROMIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: AMMONIUM CHLORIDE versus GUAIFENESIN AND DEXTROMETHORPHAN HYDROBROMIDE.
AMMONIUM CHLORIDE vs GUAIFENESIN AND DEXTROMETHORPHAN HYDROBROMIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Ammonium chloride is an acidifying agent. It dissociates to ammonium and chloride ions. The ammonium ion is converted to urea in the liver, releasing hydrogen ions, which lower blood and urinary pH. It also increases chloride concentration, promoting excretion of bicarbonate and other bases.
Guaifenesin is an expectorant that increases respiratory tract fluid secretions, reducing mucus viscosity. Dextromethorphan is a centrally acting cough suppressant that binds to NMDA receptors and sigma-1 receptors, elevating the cough threshold.
For metabolic alkalosis: 1-2 g orally 3-4 times daily; or 1 g (as 2 mmol/kg) intravenously over 4-6 hours, repeat as needed based on blood gas analysis.
For adults and children ≥12 years: 10 mL (200 mg guaifenesin, 20 mg dextromethorphan) orally every 4 hours, not to exceed 60 mL (1200 mg guaifenesin, 120 mg dextromethorphan) per 24 hours.
None Documented
None Documented
Clinical Note
moderateAmmonium chloride + Mecamylamine
"The serum concentration of Mecamylamine can be decreased when it is combined with Ammonium chloride."
Clinical Note
moderateAmmonium chloride + Benzphetamine
"The serum concentration of Benzphetamine can be decreased when it is combined with Ammonium chloride."
Clinical Note
moderateAmmonium chloride + Amphetamine
"The serum concentration of Amphetamine can be decreased when it is combined with Ammonium chloride."
Clinical Note
moderateTerminal elimination half-life is approximately 8-12 hours in normal renal function; prolonged in renal impairment (up to 30 hours) due to reliance on renal acid excretion.
Guaifenesin: 1-2 hours; Dextromethorphan: 3-6 hours (extensive metabolizers), 18-24 hours (poor metabolizers due to CYP2D6 polymorphism).
Renal: >99% as ammonium ion (NH4+) and chloride (Cl-), with acid excretion via conversion of NH4+ to urea in liver; minimal biliary/fecal.
Guaifenesin: ~60% renal (metabolites), ~35% fecal; Dextromethorphan: ~70% renal (parent and metabolites, 45% as unchanged dextrorphan), ~20% biliary/fecal.
Category C
Category C
Expectorant/Systemic Acidifier
Expectorant/Antitussive Combination
Ammonium chloride + Mephentermine
"The serum concentration of Mephentermine can be decreased when it is combined with Ammonium chloride."