Terazosin is an alpha-1 adrenergic receptor antagonist used primarily for the treatment of hypertension and benign prostatic hyperplasia (BPH). It relaxes smooth muscle in blood vessels and the bladder neck/prostate, leading to vasodilation and improved urine flow. Terazosin is structurally related to prazosin but has a longer half-life, allowing for once-daily dosing.
It is administered orally in tablet form.
Indications include:
∙ Hypertension (as monotherapy or in combination)
∙ Benign prostatic hyperplasia (BPH) — to relieve urinary symptoms like hesitancy, weak stream, and nocturia
Parent: Alfuzosin / Terazosin / Prazosin / Doxazosin
Parent: Terazosin/ Prazosin
Parent: Terazosin
Parent: Terazosin ,Doxazosin , Prazosin,
Parent: Terazosin / Prazosin
Parent: Terazosin
Parent: Terazosin
Parent: Terazosin
Parent: Terazosin
Parent: Terazosin/ Prazosin
Parent: Terazosin / Prazosin
Parent: Terazosin / Prazosin
Parent: Terazosin
Parent: Terazosin/ Terazosin Hydrochloride Dihydrate
Parent: Prazosin / Terazosin
Impurities in terazosin may arise from its multi-step synthesis, particularly during quinazoline ring formation, side chain alkylation, and hydrochloride salt formation, as well as from degradation under environmental stress. As it is used in chronic conditions, impurity levels must meet ICH Q3A/B and USP/EP standards.
Process-Related Impurities
Degradation Impurities
Elemental Impurities
Analytical Techniques for Impurity Detection
Terazosin is used to treat high blood pressure and urinary symptoms of BPH, helping to lower blood pressure and improve urine flow by relaxing smooth muscle.
It blocks alpha-1 adrenergic receptors in vascular and prostatic smooth muscle, leading to vasodilation and decreased resistance in the urinary tract.
Yes, but it is sensitive to light, moisture, and heat. It should be stored in a cool, dry place, in its original light-protective packaging.
Terazosin is a non-selective alpha-1 blocker (affecting both blood vessels and the prostate), while tamsulosin is more uroselective, with fewer effects on blood pressure.
