Itrin

Terazosin, the active ingredient in Itrin, is a alpha-1 adrenergic receptor antagonist presented as a tablet for oral use. It treats hypertension and benign prostatic hyperplasia in adult patients. GNH USA supplies Itrin as a licensed, GDP-compliant international pharmaceutical supplier serving hospitals, pharmacies and clinics worldwide.

Terazosin is employed in conditions that involve elevated vascular tone or prostatic smooth‑muscle contraction. - Hypertension: lowers systemic blood pressure by reducing peripheral vascular resistance. - Benign prostatic hyperplasia (BPH): relaxes prostate and bladder neck smooth muscle to improve urine flow. - Male lower urinary tract symptoms: alleviates urinary urgency and frequency associated with BPH.

Terazosin may cause a range of adverse reactions, most of which are dose‑related and reversible.

Common Side Effects: - Dizziness or light‑headedness - Headache - Fatigue or weakness - Nasal congestion - Peripheral edema - Nausea or abdominal discomfort

Serious or Rare Side Effects: - Severe hypotension or syncope - Priapism (prolonged erection) - Angioedema or severe allergic reaction - Hepatic dysfunction - Cardiac arrhythmia - Renal impairment exacerbation

Before initiating therapy, clinicians should evaluate patient‑specific factors and monitor for adverse events. - Blood pressure monitoring: check regularly after dose changes. - Orthostatic hypotension: advise patients to rise slowly from sitting or lying positions. - Hepatic impairment: use with caution and consider dose adjustment. - Concomitant antihypertensives: assess for additive blood‑pressure lowering effects. - Renal function: monitor in patients with chronic kidney disease. - Store at room temperature: keep in the original pack, protect from moisture.

Terazosin can interact with several drug classes, influencing its efficacy or safety.

Major Interactions (Avoid): - Potent CYP3A4 inhibitors (e.g., ketoconazole): may increase plasma levels. - Other alpha‑1 blockers: risk of excessive hypotension. - Phosphodiesterase‑5 inhibitors (e.g., sildenafil): can cause severe hypotension.

Moderate Interactions (Monitor Closely):\n- Diuretics: may enhance orthostatic effects. - NSAIDs: can blunt antihypertensive response. - Lithium: may increase serum lithium concentrations. - Beta‑blockers: additive blood‑pressure lowering effect.