Comparative Pharmacology
Head-to-head clinical analysis: CHLORTHALIDONE versus METHYCLOTHIAZIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: CHLORTHALIDONE versus METHYCLOTHIAZIDE.
CHLORTHALIDONE vs METHYCLOTHIAZIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Thiazide-like diuretic; inhibits sodium-chloride cotransporter in distal convoluted tubule, increasing excretion of sodium, chloride, and water. Also lowers peripheral vascular resistance.
Thiazide-like diuretic that inhibits sodium-chloride symporter in distal convoluted tubule, increasing excretion of sodium, chloride, and water. Reduces peripheral vascular resistance.
Oral: 25-100 mg once daily; initial dose 25 mg once daily; may increase to 50-100 mg once daily based on response.
2.5-10 mg orally once daily.
MODERATE Risk
MODERATE Risk
Terminal half-life 40-60 hours (range 35-70h); prolonged in renal impairment
Clinical Note
moderateChlorthalidone + Digoxin
"The risk or severity of adverse effects can be increased when Chlorthalidone is combined with Digoxin."
Clinical Note
moderateMethyclothiazide + Digoxin
"The risk or severity of adverse effects can be increased when Methyclothiazide is combined with Digoxin."
Clinical Note
moderateChlorthalidone + Digitoxin
"The risk or severity of adverse effects can be increased when Chlorthalidone is combined with Digitoxin."
Clinical Note
moderateMethyclothiazide + Digitoxin
Terminal elimination half-life: ~40 hours (range 30-50 h); due to extensive tubular reabsorption, half-life is prolonged in renal impairment and elderly, allowing once-daily dosing
Renal: 50-65% unchanged; biliary/fecal: minimal (<5%)
Primarily renal (70-80% as unchanged drug via tubular secretion and glomerular filtration); minor biliary/fecal (<10%)
Category C
Category C
Thiazide Diuretic
Thiazide Diuretic
"The risk or severity of adverse effects can be increased when Methyclothiazide is combined with Digitoxin."