Comparative Pharmacology
Head-to-head clinical analysis: HYDRALAZINE HYDROCHLORIDE W HYDROCHLOROTHIAZIDE 100 50 versus HYDROFLUMETHIAZIDE.
Peer-Reviewed Evidence
Head-to-head clinical analysis: HYDRALAZINE HYDROCHLORIDE W HYDROCHLOROTHIAZIDE 100 50 versus HYDROFLUMETHIAZIDE.
HYDRALAZINE HYDROCHLORIDE W/ HYDROCHLOROTHIAZIDE 100/50 vs HYDROFLUMETHIAZIDE
Comparing the clinical profiles, pharmacokinetic behaviors, and safety indices of these two therapeutic agents.
Hydralazine: Direct vasodilation of arterioles via unknown mechanism, possibly involving nitric oxide. Hydrochlorothiazide: Thiazide diuretic that inhibits the Na+/Cl- cotransporter in the distal convoluted tubule, increasing excretion of sodium and water.
Hydroflumethiazide is a thiazide diuretic that inhibits the sodium-chloride symporter (NCC) in the distal convoluted tubule of the nephron, reducing sodium and chloride reabsorption and promoting diuresis. It also causes vasodilation by reducing peripheral vascular resistance.
1 tablet (hydralazine 100 mg / hydrochlorothiazide 50 mg) orally once daily. Maximum: 1 tablet daily. Titrate from lower doses of individual components.
Oral: 25-50 mg once daily; may increase to 100 mg/day in divided doses if needed.
None Documented
None Documented
Clinical Note
moderateHydroflumethiazide + Digoxin
"The risk or severity of adverse effects can be increased when Hydroflumethiazide is combined with Digoxin."
Clinical Note
moderateHydroflumethiazide + Digitoxin
"The risk or severity of adverse effects can be increased when Hydroflumethiazide is combined with Digitoxin."
Clinical Note
moderateHydroflumethiazide + Deslanoside
"The risk or severity of adverse effects can be increased when Hydroflumethiazide is combined with Deslanoside."
Clinical Note
moderateHydralazine: 2-8 hours (prolonged in renal impairment); Hydrochlorothiazide: 6-15 hours (increased in renal impairment)
Terminal elimination half-life of 6-9 hours in patients with normal renal function; clinically, this supports once-daily dosing in hypertension but may require twice-daily dosing in some patients with impaired renal function
Hydralazine: 90% renal metabolites, 10% feces; Hydrochlorothiazide: >95% renal (tubular secretion) as unchanged drug
Primarily renal (approximately 85% as unchanged drug via glomerular filtration and tubular secretion); minor biliary/fecal elimination (<10%)
Category A/B
Category C
Thiazide Diuretic
Thiazide Diuretic
Hydroflumethiazide + Acetyldigitoxin
"The risk or severity of adverse effects can be increased when Hydroflumethiazide is combined with Acetyldigitoxin."