Losartan 50mg tablet is indicated for the treatment of hypertension and to reduce the risk of stroke in patients with high blood pressure and left ventricular hypertrophy; it is contraindicated in patients with a history of hypersensitivity to losartan, pregnancy, and severe renal impairment; common side effects include dizziness, fatigue, and hypotension; it may interact with other antihypertensive agents, potassium supplements, and non-steroidal anti-inflammatory drugs (NSAIDs).