Itrin (Terazosin Hydrochloride Dihydrate)

Terazosin selectively blocks alpha‑1 adrenergic receptors on vascular smooth muscle and in the prostate. This blockade prevents norepinephrine‑induced contraction, leading to vasodilation that lowers peripheral resistance and blood pressure, while also relaxing prostatic and bladder neck smooth muscle to ease urinary obstruction.

The appropriate dose of Itrin is determined by the prescribing clinician based on the individual’s medical condition, response, and tolerance. Dosage may be started low and titrated upward, but exact regimens should only be set by a qualified healthcare professional.

Safety data for terazosin in pregnancy and lactation are limited, and the product is generally not recommended for use in pregnant or nursing women unless the potential benefit justifies the potential risk. Physicians should evaluate each case individually.

To request Itrin, submit an enquiry on the product page at gnhindia.com, specifying the required quantity. GNH India works with hospitals, pharmacies and procurement teams worldwide, verifies trade or institutional credentials, and then provides pricing, availability, shipping details (including any cold‑chain requirements) and necessary import documentation.

Itrin (terazosin) shares the class‑wide effect of vasodilation and prostate smooth‑muscle relaxation with drugs such as doxazosin and tamsulosin. Compared with tamsulosin, terazosin has a broader antihypertensive effect, while tamsulosin is more uro‑selective with fewer blood‑pressure changes. Choice depends on the patient’s primary indication and tolerance profile.

Store Itrin tablets at room temperature, preferably below 25 °C, in the original container to protect from moisture and light. Keep the product out of reach of children and do not use if the packaging is damaged or the tablets appear discolored.

Itrin is taken orally, usually with a full glass of water. It can be taken with or without food, but consistent timing each day helps maintain stable blood levels. Patients should follow the prescribing clinician’s instructions regarding the exact time of day and whether to take it on an empty stomach.

The most serious adverse events include severe hypotension, syncope, priapism, and allergic reactions such as angioedema. Patients should seek immediate medical attention if they experience sudden dizziness, fainting, a painful prolonged erection, or signs of a severe allergic response.

Itrin is contraindicated in patients with known hypersensitivity to terazosin or any component of the formulation, and in those with severe hepatic impairment. Caution is also advised for individuals with a history of orthostatic hypotension, recent myocardial infarction, or those taking multiple potent antihypertensives without close monitoring.